title: QCD at high energy (experiments)

abstract:
  Recent measurements of QCD interactions involving large momentum transfers
are reviewed. The status of measurements of the strong coupling constant is
summarised. Recent developments in the measurement and interpretation of deep
inelastic scattering, proton-anti-proton collisions and two-photon processes
are discussed. While QCD at next-to-leading order gives a qualitative
description of many processes, next-to-NLO calculations are now required to
allow quantitative information to be extracted from hadron-initiated multijet
data. This is illustrated by a discussion of recent data on the photoproduction
of dijet events at HERA.


title: Search for the Lepton Number Violating Decay Tau to Mu Gamma

abstract:
  Using data collected with the BaBar detector between 1999 and 2001, we
describe a preliminary search for the neutrinoless decay Tau to Mu Gamma. This
data sample includes data collected both on and off the Upsilon(4S) resonance
and corresponds to 56 million produced tau pair events. The search has an
efficiency of 5.2 +- 0.1(MCstat) +- 0.5(sys) % and an expected background rate
of 7.8 +- 1.4 events. We select 13 events in the final sample. As there is no
evidence for a signal in this data, we set a preliminary upper limit of B(Tau
to Mu Gamma) < 2.0 x 10^-6 @90% CL.


title: A Method for Measuring Emittance in $e^+ e^-$ Colliding Beams

abstract:
  We have developed techniques that allow simultaneous measurement of the
spatial size of the luminous colliding beam region and the angular spread of
beams in collision using e+e- --> mu+mu- events. These are demonstrated at the
CLEO interaction point of the Cornell Electron-Positron Storage Ring, CESR,
taking advantage of the small and well understood resolution of the CLEO
tracking system. These measurements are then used to extract the horizontal
beta, horizontal emittance and the vertical emittance and search for dynamic
effects at CESR.


title: Beam Tests of Ionization Chambers for the NuMI Neutrino Beam

abstract:
  We have conducted tests at the Fermilab Booster of ionization chambers to be
used as monitors of the NuMI neutrino beamline. The chambers were exposed to
proton fluxes of up to 10$^{12}$ particles/cm$^2$/1.56$\mu$s. We studied space
charge effects which can reduce signal collection from the chambers at large
charged particle beam intensities.


title:
Measurement of the B0 meson lifetime with partial reconstruction of B0
  --> D*- pi+ and B0 --> D*- rho+ decays

abstract:
  The neutral $B$ meson lifetime is measured with the data collected by the
BaBar detector at the PEP-II storage ring during the years 1999 and 2000, with
a total integrated luminosity of 20.7 ${\rm fb}^{-1}$. The decays $B^0 \to
D^{*-} \pi^+$ and $B^0 \to D^{*-} \rho^+$ are selected with a
partial-reconstruction technique, yielding samples of $6970 \pm 240$ and $5520
\pm 250$ signal events, respectively. With these events, the $B^0 $ lifetime is
measured to be $ 1.533 \pm 0.034 {\rm (stat.)} \pm 0.038 {\rm (syst.)} {\rm
ps}$. This measurement serves as a test and validation of procedures required
to measure the CP violation parameter $\sin(2\beta + \gamma)$ with partial
reconstruction of these modes.


title: Spin Physics at RHIC

abstract:
  The physics goals that will be addressed by colliding polarized protons at
the Relativistic Heavy Ion Collider (RHIC) are described. The RHIC spin program
provides a new generation of experiments that will unfold the quark, anti-quark
and gluon contributions to the proton's spin. In addition to these longer term
goals, this paper describes what was learned from the first polarized proton
collisions at $\sqrt{s}$=200 GeV. These collisions took place in a five-week
run during the second year of RHIC operation.


title:
First Measurement of Transferred Polarization in the Exclusive e p -->
  e' K+ Lambda Reaction

abstract:
  The first measurements of the transferred polarization for the exclusive ep
--> e'K+ Lambda reaction have been performed in Hall B at the Thomas Jefferson
National Accelerator Facility using the CLAS spectrometer. A 2.567 GeV electron
beam was used to measure the hyperon polarization over a range of Q2 from 0.3
to 1.5 (GeV/c)2, W from 1.6 to 2.15 GeV, and over the full center-of-mass
angular range of the K+ meson. Comparison with predictions of hadrodynamic
models indicates strong sensitivity to the underlying resonance contributions.
A non-relativistic quark model interpretation of our data suggests that the
s-sbar quark pair is produced with spins predominantly anti-aligned.
Implications for the validity of the widely used 3P0 quark-pair creation
operator are discussed.


title: Fragmentation functions using e+e- data from PETRA and LEP

abstract:
  We investigate fragmentation of charged particles in e+e- annihilation at 22,
35 and 44 GeV in terms of their polar angle and momentum distributions. From
the angular distribution the ratio of longitudinal to total hadronic
cross-section was determined at an average energy scale of 36.6 GeV to be
$\sigma_L / \sigma_{tot} = 0.076 \pm 0.013$. At next-to-leading order this
yields $ \alpha_S (36.6 GeV) = 0.150 \pm 0.025 $. The $\xi = \ln (1/x)$
distributions were used in conjunction with OPAL data from 91-208 GeV to study
the scale dependence of the maximum position, $\xi_0$. We studied flavour
dependence of $\xi_0$ as a possible explanation of this problem, using direct
flavour dependent measurements of $\xi_0$ at 91 GeV by OPAL.


title: Search for MSSM Higgses at the Tevatron

abstract:
  We present an overview of searches for MSSM Higgs at the Tevatron,
concentrating on searches probing the high tan(beta) region. We discuss the
search for A/H -> tau tau which is soon to be completed in the Run I data and
review the new tau triggers implemented by CDF and D0 in Run II, which will
greatly impact this analysis. We also present the results of a Run I search for
A/H bb -> bbbb performed by CDF and highlight expected improvements in this
channel by both experiments in Run II.


title:
Simultaneous Measurement of the B0 Meson Lifetime and Mixing Frequency
  with B0 --> D*- l+ nu Decays

abstract:
  We measure the B0 lifetime \tau_{B0} and the B0-B0bar oscillation frequency
\Delta m_d with a sample of approximately 14,000 exclusively reconstructed B0
--> D*- l+ nu signal events, selected from 23 million BBbar pairs recorded at
the \Upsilon(4S) resonance with the BABAR detector at the Stanford Linear
Accelerator Center. The decay position of the other B is determined with the
remaining tracks in the event, and its b-quark flavor at the time of decay is
determined with a tagging algorithm that exploits the correlation between the
flavor of the b-quark and the charges of its decay products. The lifetime and
oscillation frequency are measured simultaneously with an unbinned
maximum-likelihood fit that uses, for each event, the measured difference in
decay times of the two B mesons (\Delta t), the calculated uncertainty on
\Delta t, the signal and background probabilities, and b-quark tagging
information for the other B. The results are \tau_{B^0} =
(1.523^{+0.024}_{-0.023} \pm 0.022) \rm{ps} and \Delta m_d = (0.492 \pm 0.018
\pm 0.013) \rm{ps}^{-1}. The statistical correlation coefficient between
\tau_{B0} and \Delta m_d is -0.22.


title: Radiation Hardness and Linearity Studies of CVD Diamonds

abstract:
  We report on the behavior of CVD diamonds under intense electromagnetic
radiation and on the response of the detector to high density of deposited
energy. Diamonds have been found to remain unaffected after doses of 10 MGy of
MeV-range photons and the diamond response to energy depositions of up to 250
GeV/cm^3 has been found to be linear to better than 2 %. These observations
make diamond an attractive detector material for a calorimeter in the very
forward region of the detector proposed for TESLA.


title: Deeply-Virtual Compton Scattering on Deuterium and Neon at HERMES

abstract:
  We report the first observation of azimuthal beam-spin asymmetries in hard
electroproduction of real photons off nuclei. Attributed to the interference
between the Bethe-Heitler process and the deeply-virtual Compton scattering
process, the asymmetry gives access to the latter at the amplitude level. This
process appears to be the theoretically cleanest way to access generalized
parton distributions. The data presented here have been accumulated by the
HERMES experiment at DESY, scattering the HERA 27.6 GeV positron beam off
deuterium and neon gas targets.


title: Light Quark Spectroscopy and Charm Decays

abstract:
  Weak decays of charm mesons has been used for studies of light quark
spectroscopy, with particular emphasis on the J^{PC}=0^{++} states. Recent
results on light scalars are summarized and some conceptual issues are
discussed, especially the relation between charm decays and hadronic
production.


title:
First Results from KamLAND: Evidence for Reactor Anti-Neutrino
  Disappearance

abstract:
  KamLAND has been used to measure the flux of $\bar{\nu}_e$'s from distant
nuclear reactors. In an exposure of 162 ton$\cdot$yr (145.1 days) the ratio of
the number of observed inverse $\beta$-decay events to the expected number of
events without disappearance is $0.611\pm 0.085 {\rm (stat)} \pm 0.041 {\rm
(syst)} $ for $\bar{\nu}_e$ energies $>$ 3.4 MeV. The deficit of events is
inconsistent with the expected rate for standard $\bar{\nu}_e$ propagation at
the 99.95% confidence level. In the context of two-flavor neutrino oscillations
with CPT invariance, these results exclude all oscillation solutions but the
`Large Mixing Angle' solution to the solar neutrino problem using reactor
$\bar{\nu}_e$ sources.


title: B Physics at Hadron Colliders

abstract:
  Hadron colliders have played, and will continue to play, a crucial role in
the understanding of CP violation. Their impact is expected to be especially
important in the study of CP asymmetries in rare decays and the $B_s$ meson.
The experimental challenge and reach of current and future experiments is
discussed.


title: Minireview of Leptoquark Searches

abstract: Direct and indirect leptoquark searches at colliders are reviewed.


title:
Searches for gauge mediated supersymmetry breaking at ALEPH with
  centre-of-mass energies up to 209 GeV

abstract:
  A total of 628 pb-1 of data collected with the ALEPH detector at
centre-of-mass energies from 189 to 209 GeV is analysed in the search for gauge
mediated supersymmetry breaking (GMSB) topologies. In this framework, a novel
search for six-lepton final states when the stau is the next-to-lightest
supersymmetric particle (NLSP) and has negligible lifetime is performed. Other
possible signatures at LEP are studied and the ALEPH final results described
for two acoplanar photons, non-pointing single photons, acoplanar leptons,
large impact parameter leptons, detached slepton decay vertices, heavy stable
charged sleptons and multi-leptons plus missing energy final states. No
evidence is found for new phenomena, and lower limits on the masses of the
relevant supersymmetric particles are derived. A scan of a minimal GMSB
parameter space is performed and lower limits are set for the NLSP mass at 54
GeV and for the mass scale parameter Lambda at 10 TeV, independent of the NLSP
lifetime. Including the results from the neutral Higgs boson searches, a NLSP
mass limit of 77 GeV is obtained and values of Lambda up to 16 TeV are
excluded.


title:
The RASNIK Real-Time Relative Alignment Monitor for the CDF Inner
  Tracking Detectors

abstract:
  We describe the design and operation of the RASNIK optical relative alignment
system designed for and installed on the CDF inner tracking detectors. The
system provides low-cost minute-by-minute alignment monitoring with submicron
precision. To reduce ambiguities, we modified the original three-element rasnik
design to a two-element one. Since the RASNIKs are located within 10--40 cm of
the beamline, the systems were built from low-mass and radiation-hard
components and are operated in a mode which reduces damage from radiation. We
describe the data-acquisition system, which has been running without
interruption since before the CDF detector was rolled into its collision hall
in March 2001. We evaluate what has been learned about sources of detector
motion from almost two years of RASNIK data and discuss possible improvements
to the system.


title:
Design and Tests of the Silicon Sensors for the ZEUS Micro Vertex
  Detector

abstract:
  To fully exploit the HERA-II upgrade,the ZEUS experiment has installed a
Micro Vertex Detector (MVD) using n-type, single-sided, silicon micro-strip
sensors with capacitive charge division. The sensors have a readout pitch of
120 micrometers, with five intermediate strips (20 micrometer strip pitch). The
designs of the silicon sensors and of the test structures used to verify the
technological parameters, are presented. Results on the electrical measurements
are discussed. A total of 1123 sensors with three different geometries have
been produced by Hamamatsu Photonics K.K. Irradiation tests with reactor
neutrons and Co-60 photons have been performed for a small sample of sensors.
The results on neutron irradiation (with a fluence of 1 x 10^{13} 1 MeV
equivalent neutrons / cm^2) are well described by empirical formulae for bulk
damage. The Co-60 photons (with doses up to 2.9 kGy) show the presence of
generation currents in the SiO_2-Si interface, a large shift of the flatband
voltage and a decrease of the hole mobility.


title: Top quark and W/Z results from the Tevatron

abstract:
  We summarize results of some crucial measurements of the top quark and W/Z
boson properties carried out by the D0 and the CDF collaborations at the
Tevatron collider at Fermilab based on data collected during Run 1 (1992-96).
Among the interesting properties measured are the pair-production cross section
and the mass of the top quark, and the mass and the width of the W boson.
Searches for singly produced top quarks and for certain non-standard production
and decays of the top quark, as well as studies of angular correlations in the
production and decay of the top quarks are also presented. Expectations from
the ongoing Run 2 of the Tevatron, presently in its second year, are discussed.


title: Light Quark Spectroscopy Results from FOCUS and E687

abstract:
  Using the FOCUS spectrometer (experiments 687 and 831 at Fermilab) we confirm
the existence of a diffractively photoproduced enhancement in $K^+K^- $ at 1750
\mevcc with nearly 100 times the statistics of previous experiments.
  We also observe a narrow dip structure at 1.9 GeV/c$^2$ in a study of
diffractive photoproduction of the $3\pi^+3\pi^-$ final state.


title: First Observation of Doubly Charmed Baryons

abstract:
  The SELEX experiment (E781) at Fermilab has observed two statistically
compelling high mass states near 3.6 GeV/c^2, decaying to Lambda_c+ K- pi+ and
Lambda_c+ K- pi+ pi+. These final states are Cabibbo-allowed decay modes of
doubly charmed baryons $\Xi_{cc}^+$ and $\Xi_{cc}^{++}$, respectively. The
masses are in the range expected from theoretical considerations, but the
spectroscopy is surprising. SELEX also has weaker preliminary evidence for a
state near 3.8 GeV/$\rm{c}^2$, a high mass state decaying to Lambda_c+ K- pi+
pi+, possibly an excited $\Xi_{cc}^{++}$ (ccu*). Data are presented and
discussed.


title:
Measurement of subjet multiplicities in neutral current deep inelastic
  scattering at HERA and determination of $\alpha_s$

abstract:
  The subjet multiplicity has been measured in neutral current e+p interactions
at Q**2 > 125 GeV**2 with the ZEUS detector at HERA using an integrated
luminosity of 38.6 pb-1. Jets were identified in the laboratory frame using the
longitudinally invariant K_T cluster algorithm. The number of jet-like
substructures within jets, known as the subjet multiplicity, is defined as the
number of clusters resolved in a jet by reapplying the jet algorithm at a
smaller resolution scale y_cut. Measurements of the mean subjet multiplicity, <
n_sbj >, for jets with transverse energies E_T,jet >15 GeV are presented.
Next-to-leading-order perturbative QCD calculations describe the measurements
well. The value of alpha_s(M_Z), determined from < n_sbj > at y_cut=10**-2 for
jets with 25 < E_T,jet < 71 GeV, is alpha_s (M_Z) = 0.1187 +/- 0.0017 (stat.)
+0.0024 / -0.0009 (syst.) +0.0093 / -0.0076 (th.).


title: The TESLA Time Projection Chamber

abstract:
  A large Time Projection Chamber is proposed as part of the tracking system
for a detector at the TESLA electron positron linear collider. Different
ongoing R&D studies are reviewed, stressing progress made on a new type readout
technique based on Micro-Pattern Gas Detectors.


title:
Deviation of the Nucleon Shape From Spherical Symmetry: Experimental
  Status

abstract:
  In this brief pedagogical overview the physical basis of the deviation of the
nucleon shape from spherical symmetry will be presented along with the
experimental methods used to determine it by the gamma* p -> Delta reaction.The
fact that significant non-spherical electric(E2) and Coulomb quadrupole(C2)
amplitudes have been observed will be demonstrated. These multipoles for the
N,Delta system as a function of Q^2 from the photon point through 4 GeV^2 have
been measured with modest precision. Their precise magnitude remains model
dependent due to the contributions of the background amplitudes, although rapid
progress is being made to reduce these uncertainties. A discussion of what is
required to perform a model independent analysis is presented. All of the data
to date are consistent with a prolate shape for the proton (larger at the
poles) and an oblate shape(flatter at the poles) for the Delta. It is suggested
here that the fundamental reason for this lies in the spontaneous breaking of
chiral symmetry in QCD and the resulting, long range(low Q^2), effects of the
pion cloud. This verification of this suggestion, as well as a more accurate
measurement of the deviation from spherical symmetry, requires further
experimental and theoretical effort.


title: Studies of B0-B0bar Mixing Properties with Inclusive Dilepton Events

abstract:
  We report a precise determination of the B0-B0bar mixing parameter Delta-m_d
based on the time evolution of same-sign and opposite-sign dilepton yields in
Upsilon(4S) decays. Data were collected with the Belle detector at KEKB. Using
data samples of 29.4 1/fb recorded at the Upsilon(4S) resonance and 3.0 1/fb
recorded at an energy 60MeV below the resonance, we measure Delta m_d = (0.503
+- 0.008(stat) +- 0.010(sys)) 1/ps. From the same analysis, we also measure the
ratio of charged and neutral B meson production at the Upsilon(4S), f+/f0 =
1.01 +- 0.03(stat) +- 0.09(sys), and CPT violation parameters in B0-B0bar
mixing, Re(cos theta) = 0.00 +- 0.12(stat) +- 0.01(sys) and Im(cos theta) =
0.03 +- 0.01(stat) +- 0.03(sys).


title:
Towards Coherent Neutrino Detection Using Low-Background Micropattern
  Gas Detectors

abstract:
  The detection of low energy neutrinos ($<$ few tens of MeV) via coherent
nuclear scattering remains a holy grail of sorts in neutrino physics. This
uncontroversial mode of interaction is expected to profit from a sizeable
increase in cross section proportional to neutron number squared in the target
nucleus, an advantageous feature in view of the small probability of
interaction via all other channels in this energy region. A coherent neutrino
detector would open the door to many new applications, ranging from the study
of fundamental neutrino properties to true "neutrino technology".
Unfortunately, present-day radiation detectors of sufficiently large mass ($>$
1 kg) are not sensitive to sub-keV nuclear recoils like those expected from
this channel. The advent of Micropattern Gas Detectors (MPGDs), new
technologies originally intended for use in High Energy Physics, may soon put
an end to this impasse. We present first tests of MPGDs fabricated with
radioclean materials and discuss the approach to assessing their sensitivity to
these faint signals. Applications are reviewed, in particular their use as a
safeguard against illegitimate operation of nuclear reactors. A first
industrial mass production of Gas Electron Multipliers (GEMs) is succinctly
described.

categories: hep-ex astro-ph hep-ph nucl-ex physics.ins-det


title: New Results from Super-K and K2K

abstract:
  This paper summarizes recent (as of SSI-02, in some cases updated in
November, 2002) results from the Super-Kamiokande and K2K experiments. The
interpretation of Super-Kamiokande results on atmospheric and solar neutrinos
provides strong evidence for neutrino oscillations, hence non-zero neutrino
mass. While statistics are still limited, K2K data are consistent with
Super-Kamiokande results on neutrino oscillations. The effort to reconstruct
Super-Kamiokande following a cascade of phototube implosions in November, 2001
is described. Plans for the future are also discussed.


title:
A Combination of Preliminary Electroweak Measurements and Constraints on
  the Standard Model

abstract:
  This note presents a combination of published and preliminary electroweak
results from the four LEP collaborations and the SLD collaboration which were
prepared for the 2002 summer conferences. Averages from Z resonance results are
derived for hadronic and leptonic cross sections, the leptonic forward-backward
asymmetries, the tau polarisation asymmetries, the b-bbar and c-cbar partial
widths and forward-backward asymmetries and the q-qbar charge asymmetry. Above
the Z resonance, averages are derived for di-fermion cross sections and
forward-backward asymmetries, photon-pair, W-pair, Z-pair, single-W and
single-Z cross sections, electroweak gauge boson couplings, W mass and width
and W decay branching ratios. The main changes with respect to the experimental
results presented in summer 2001 are updates to the Z-pole heavy flavour
results from SLD and LEP, and new combinations of results above the Z pole. A
new investigation of the interference of photon and Z-boson exchange is
presented. For the first time, colour reconnection and Bose-Einstein
correlation analyses in W-pair production are combined.
  The results are compared with precise electroweak measurements from other
experiments, notably the recent final result on the electroweak mixing angle
determined in neutrino-nucleon scattering by the NuTeV collaboration. The
parameters of the Standard Model are evaluated, first using the combined LEP
electroweak measurements, and then using the full set of electroweak results.


title: Beam Test of Silicon Strip Sensors for the ZEUS Micro Vertex Detector

abstract:
  For the HERA upgrade, the ZEUS experiment has designed and installed a high
precision Micro Vertex Detector (MVD) using single sided micro-strip sensors
with capacitive charge division. The sensors have a readout pitch of 120
microns, with five intermediate strips (20 micron strip pitch). An extensive
test program has been carried out at the DESY-II testbeam facility. In this
paper we describe the setup developed to test the ZEUS MVD sensors and the
results obtained on both irradiated and non-irradiated single sided micro-strip
detectors with rectangular and trapezoidal geometries. The performances of the
sensors coupled to the readout electronics (HELIX chip, version 2.2) have been
studied in detail, achieving a good description by a Monte Carlo simulation.
Measurements of the position resolution as a function of the angle of incidence
are presented, focusing in particular on the comparison between standard and
newly developed reconstruction algorithms.


title: Fermiophobic Higgs bosons at LEP

abstract:
  This work describes the results of the searches for a Higgs boson decaying
into gauge bosons carried out by the four LEP collaborations: ALEPH, DELPHI, L3
and OPAL. A lower bound of 109.7 GeV is set at 95% confidence level on the mass
of a fermiophobic Higgs boson decaying into photons. This mass limit can be
extended by considering the Higgs decay mode into weak bosons. Such a
combination has been done by the L3 collaboration which extended the
fermiophobic mass by 5 GeV.


title:
Measurement of single-spin azimuthal asymmetries in semi-inclusive
  electroproduction of pions and kaons on a longitudinally polarised deuterium
  target

abstract:
  Single-spin asymmetries have been measured for semi-inclusive
electroproduction of $\pi^+$, $\pi^-$, $\pi^0$ and $K^+$ mesons in
deep-inelastic scattering off a longitudinally polarised deuterium target. The
asymmetries appear in the distribution of the hadrons in the azimuthal angle
$\phi$ around the virtual photon direction, relative to the lepton scattering
plane. The corresponding analysing powers in the $\sin \phi$ moment of the
cross section are $0.012 \pm 0.002 {(stat.)} \pm 0.002 {(syst.)}$ for $\pi^+$,
  $0.006 \pm 0.003 {(stat.)} \pm 0.002 {(syst.)}$ for $\pi^-$,
  $0.021 \pm 0.005 {(stat.)} \pm 0.003 {(syst.)}$ for $\pi^0$ and $0.013 \pm
0.006 {(stat.)} \pm 0.003 {(syst.)}$ for $K^+$. The $\sin 2\phi$ moments are
compatible with zero for all particles.


title:
Inclusive $V^0$ Production Cross Sections from 920 GeV Fixed Target
  Proton-Nucleus Collisions

abstract:
  Inclusive differential cross sections $d\sigma_{pA}/dx_F$ and
$d\sigma_{pA}/dp_t^2$ for the production of \kzeros, \lambdazero, and
\antilambda particles are measured at HERA in proton-induced reactions on C,
Al, Ti, and W targets. The incident beam energy is 920 GeV, corresponding to
$\sqrt {s} = 41.6$ GeV in the proton-nucleon system. The ratios of differential
cross sections \rklpa and \rllpa are measured to be $6.2\pm 0.5$ and $0.66\pm
0.07$, respectively, for \xf $\approx-0.06$. No significant dependence upon the
target material is observed. Within errors, the slopes of the transverse
momentum distributions $d\sigma_{pA}/dp_t^2$ also show no significant
dependence upon the target material. The dependence of the extrapolated total
cross sections $\sigma_{pA}$ on the atomic mass $A$ of the target material is
discussed, and the deduced cross sections per nucleon $\sigma_{pN}$ are
compared with results obtained at other energies.


title:
Muon Acceleration with a Very Fast Ramping Synchrotron for a Neutrino
  Factory

abstract:
  A 4600 Hz fast ramping synchrotron is explored as an economical way of
accelerating muons from 4 to 20 GeV/c for a neutrino factory. Eddy current
losses are minimized by the low machine duty cycle plus thin grain oriented
silicon steel laminations and thin copper wires. Combined function magnets with
high gradients alternating within single magnets form the lattice we describe.
Muon survival is 83%.


title: Charged-Current Disappearance Measurements in the NuMI Off-Axis Beam

abstract:
  This article studies the potential of combining charged-current disappearance
measurements of \nu_{\mu} to \nu_{\tau} from MINOS and an off-axis beam. I find
that the error on \Delta m^2 from a 100 kt-yr off-axis measurement is a few
percent of itself. Further, I find little improvement to an off-axis
measurement by combining it with MINOS.


title: Structure function results from H1

abstract:
  New structure function results from H1 are presented. The measurements cover
a huge kinematical range for Q^2, the four momentum transfer squared, from
0.35, GeV^2 to 30,000, GeV^2, and for Bjorken x between \sim 5\cdot 10^{-6} and
0.65. At Q^2>100, GeV^2, full HERA, I data have been analyzed. The data are
compared with a new QCD analysis. The impact of the HERA, I data on the parton
density functions is discussed.


title: Measurement of Inclusive Spin Structure Functions of the Deuteron

abstract:
  We report the results of a new measurement of spin structure functions of the
deuteron in the region of moderate momentum transfer ($Q^2$ = 0.27 -- 1.3
(GeV/c)$^2$) and final hadronic state mass in the nucleon resonance region ($W$
= 1.08 -- 2.0 GeV). We scattered a 2.5 GeV polarized continuous electron beam
at Jefferson Lab off a dynamically polarized cryogenic solid state target
($^{15}$ND$_3$) and detected the scattered electrons with the CEBAF Large
Acceptance Spectrometer (CLAS). From our data, we extract the longitudinal
double spin asymmetry $A_{||}$ and the spin structure function $g_1^d$. Our
data are generally in reasonable agreement with existing data from SLAC where
they overlap, and they represent a substantial improvement in statistical
precision. We compare our results with expectations for resonance asymmetries
and extrapolated deep inelastic scaling results. Finally, we evaluate the first
moment of the structure function $g_1^d$ and study its approach to both the
deep inelastic limit at large $Q^2$ and to the Gerasimov-Drell-Hearn sum rule
at the real photon limit ($Q^2 \to 0$). We find that the first moment varies
rapidly in the $Q^2$ range of our experiment and crosses zero at $Q^2$ between
0.5 and 0.8 (GeV/c)$^2$, indicating the importance of the $\Delta$ resonance at
these momentum transfers.


title:
First Search for the Flavor Changing Neutral Current Decay D^0 -> gamma
  gamma

abstract:
  Using 13.8 fb^{-1} of data collected at or just below the \Upsilon(4S) with
the CLEO detector, we report the result of a search for the flavor changing
neutral current process D^{0} \to \gamma\gamma.
  We observe no significant signal for this decay mode and determine 90%
confidence level upper limits on the branching fractions Br(D^{0}\to
\gamma\gamma)/Br(D^{0}\to\pi^{0}\pi^{0}) < 0.033 and Br(D^{0}\to\gamma\gamma) <
2.9 \times 10^{-5}.''


title: Preliminary Results on gamma gamma -> Ks K pi from CLEO

abstract:
  We analyzed 13.8 fb^{-1} of the integrated e+e- luminosity collected at 10.6
GeV center-of-mass energy with the CLEO II and II.V detectors to study
exclusive two-photon production of single hadronic resonances. We searched for
hadrons decaying into Ks K pi when both leptons remain undetected. In this
analysis we studied the detection efficiency and evaluated systematic errors
using independent data samples. We estimated 90% CL upper limits on the
products of the two-photon partial widths of (pseudo)scalar hadrons with masses
below 1.7 GeV/c2 and their branching fractions into Ks K pi. Our preliminary
results are marginally consistent with the first observation of eta(1440) in
two-photon collisions by the L3 experiment.


title: Possible measurements of GPDs at COMPASS

abstract:
  This paper presents the reactions which can be performed at COMPASS to study
the Generalized Parton Distributions (GPDs). The high energy muon beam at CERN
allows to measure Hard Exclusive Meson Production or Deeply Virtual Compton
Scattering (DVCS) in the Bjorken regime in a large range of Q^2 and x_Bj
(1.5<Q^2<7.5 GeV^2 and 0.03<x_Bj<0.25). Exploratory measurements dedicated to
rho_0 or pi_0 production can be investigated with the present setup. DVCS
measurement require an upgrade of the COMPASS setup.


title:
Measurement of direct photon emission in $K^+ \to \pi^+ \pi^0 \gamma$
  decay using stopped positive kaons

abstract:
  The radiative decay $K^+ \to \pi^+ \pi^0 \gamma$ ($K_{\pi 2 \gamma}$) has
been measured with stopped positive kaons. A $K_{\pi 2 \gamma}$ sample
containing 4k events was analyzed, and the $K_{\pi 2 \gamma}$ branching ratio
of the direct photon emission process was determined to be $[6.1\pm2.5({\rm
stat})\pm1.9({\rm syst})]\times 10^{-6}$. No interference pattern with internal
bremsstrahlung was observed.


title: Searches for leptoquarks and excited fermions at HERA

abstract:
  Recent results on searches for new particles at the electron-proton collider
HERA are reported. Based on roughly 100pb-1 of e^+p data and 16pb-1 of e^-p
data per experiment, taken in the years 1994-2000, the H1 and ZEUS
collaborations have derived new exclusion limits for the direct production of
excited fermion states and leptoquarks. The latter are searched for in
different decay channels, including lepton-flavor violating decays. The
production of R_P-violating squarks followed by leptoquark-like decays to
lepton and quark is studied, as are cascade decays yielding multi-jet plus
lepton signatures. New limits from indirect searches are also reported. Several
of the searches obtain sensitivities of the same order or exceeding those of
other experiments, indicating the substantial discovery potential of future
HERA running.


title: The Physics of ALICE HLT Trigger Modes

abstract:
  We discuss different physics cases, mainly of the ALICE TPC, such as pile-up,
jets in pp and PbPb, Bottonium and Charmonium spectroscopy, and there
corresponding demands on the ALICE High Level Trigger (HLT) System. We show
that compression and filter strategies can reduce the data volume by factors of
5 to 10. By reconstructing (sub)events with the HLT, background events can be
rejected with a factor of up to 100 while keeping the signal (low cross-section
probes). Altogether the HLT improves the discussed physics capabilities of
ALICE by a factor of 5-100 in terms of statistics.


title:
Measurement of Lepton Momentum Moments in the Decay bar{B} \to X \ell
  \bar{\nu} and Determination of Heavy Quark Expansion Parameters and |V_cb|

abstract:
  We measure the primary lepton momentum spectrum in B-bar to X l nu decays,
for p_l > 1.5 GeV/c in the B rest frame. From this, we calculate various
moments of the spectrum. In particular, we find R_0 = [int(E_l>1.7)
(dGam/dE_sl)*dE_l] / [int(E_l>1.5) (dGam/dE_sl)*dE_l] = 0.6187 +/- 0.0014_stat
+/- 0.0016_sys and R_1 = [int(E_l>1.5) E_l(dGam/dE_sl)*dE_l] / [int(E_l>1.5)
(dGam/dE_sl)*dE_l] = (1.7810 +/- 0.0007_stat +/- 0.0009_sys) GeV. We use these
moments to determine non-perturbative parameters governing the semileptonic
width. In particular, we extract the Heavy Quark Expansion parameters
Lambda-bar = (0.39 +/- 0.03_stat +/- 0.06_sys +/- 0.12_th) GeV and lambda_1 =
(-0.25 +/- 0.02_stat +/- 0.05_sys +/- 0.14_th) GeV^2. The theoretical
constraints used are evaluated through order 1/M_B^3 in the non-perturbative
expansion and beta_0*alpha__s^2 in the perturbative expansion. We use these
parameters to extract |V_cb| from the world average of the semileptonic width
and find |V_cb| = (40.8 +/- 0.5_Gam-sl +/- 0.4_(lambda_1,Lambda-bar)-exp +/-
0.9_th) x 10^-3. In addition, we extract the short range b-quark mass m_b^1S =
(4.82 +/- 0.07_exp +/- 0.11_th) GeV/c^2. Finally, we discuss the implications
of our measurements for the theoretical understanding of inclusive semileptonic
processes.


title: Observation of B0bar->Lambda_c+pbar decay

abstract:
  We report the measurement of the charmed baryonic decay B0bar->Lambda_c+pbar
with a branching fraction of (2.19^{+0.56}_{-0.49}+-0.32+-0.57)x10^{-5} and a
statistical significance of 5.8 sigma. The errors are statistical, systematic,
and the error of the Lambda_c+ ->pK-pi+ decay branching fraction. This is the
first observation of a two-body baryonic B decay. The analysis is based on 78.2
fb-1 of data accumulated at the Upsilon(4S) resonance with the Belle detector
at the KEKB asymmetric e+e- collider.


title: CUORE: A Cryogenic Underground Observatory for Rare Events

abstract:
  CUORE is a proposed tightly packed array of 1000 TeO2 bolometers, each being
a cube 5 cm on a side with a mass of 760 g. The array consists of 25 vertical
towers, arranged in a square of 5 towers by 5 towers, each containing 10 layers
of 4 crystals. The design of the detector is optimized for ultralow-background
searches: for neutrinoless double beta decay of 130Te (33.8% abundance), cold
dark matter, solar axions, and rare nuclear decays. A preliminary experiment
involving 20 crystals 3x3x6 cm3 of 340 g has been completed, and a single CUORE
tower is being constructed as a smaller scale experiment called CUORICINO. The
expected performance and sensitivity, based on Monte Carlo simulations and
extrapolations of present results, are reported.


title: Search for the decay $K_S \to \pi^0\gamma\gamma$

abstract:
  A search for the decay $K_S\to\pi^0\gamma\gamma$ has been made using the NA48
detector at the CERN SPS. Using data collected in 1999 during a 40-hour run
with a high-intensity $K_S$ beam, an upper limit for the branching ratio
$BR(K_S\to\pi^0\gamma\gamma, z\ge 0.2)<3.3\times\nolinebreak 10^{-7}$ has been
obtained at 90% confidence level, where $z=m_{\gamma\gamma}^2/m_{K_0}^2$.


title: Results of Dark Matter Searches with the MACRO Experiment

abstract:
  The results of dark matter searches with the MACRO experiment are reported.
In particular indirect searches for WIMP's and direct searches for supermassive
GUT magnetic monopoles are reported together with massive neutrino studies
through the measurement of the oscillation induced anomalies in the atmospheric
neutrino flux.


title: High $p_T$ hadrons in Au+Au collisions at RHIC

abstract:
  High pT hadrons produced in ultra-relativistic heavy-ion collisions at RHIC
probe nuclear matter at extreme conditions of high energy density. Experimental
measurements in Au+Au collisions at \sqrtsNN=130, 200 GeV establish the
existence of strong medium effects on hadron production well into the
perturbative regime.


title:
Evidence for Light Scalar Resonances in Charm Meson Decays from Fermilab
  E791

abstract:
  From Dalitz-plot analyses of $D^+\to\pi^-\pi^+\pi^+$ and $D^+\to
K^-\pi^+\pi^+$ decays, we find evidence for light and broad scalar resonances
sigma(500) and kappa(800). From a Dalitz-plot analysis of
$D^+_s\to\pi^-\pi^+\pi^+$ decays, we measure the masses and decay widths of the
scalar resonances f_0(980) and f_0(1370).


title: Study of the Cabibbo-suppressed decay modes D0-->Pi-pi+ and D0-->K-K+

abstract:
  Using data from the FOCUS (E831) experiment at Fermilab, we present a new
measurement for the branching ratios of the Cabibbo-suppressed decay modes
D0-->Pi-Pi+ and D0-->K-K+. We measured:
  Gamma(D0-->K-K+)/Gamma(D0-->Pi-Pi+) = 2.81 +/- 0.10(stat) +/- 0.06(syst),
Gamma(D0-->K-K+)/Gamma(D0-->K-Pi+) = 0.0993 +/- 0.0014(stat) +/- 0.0014(syst),
and Gamma(D0-->Pi-Pi+)/Gamma(D0-->K-Pi+) = 0.0353 +/- 0.0012 (stat) +/-
0.0006(syst).
  These values have been combined with other experimental data to extract the
ratios of isospin amplitudes and the phase shifts for the D-->KK and D-->PiPi
decay channels.


title: Measurement of CP Asymmetries at BELLE

abstract:
  The Belle experiment at the KEK $B$ factory has collected 93 fb$^{-1}$ of
electron positron collisions at $\sqrt s = 10.6$ GeV. This has produced a
sample of 85 million $B {\bar B}$ meson pairs that can be used to study $CP$
violation in rare (and not so rare) B decay modes. Here I report on a
measurement of indirect CP violation in the decay $B^0 \to J/\psi K^0_S$, as
well as time dependent CP asymmetries in rarer modes such as $B^0 \to \pi^+
\pi^-, \eta' K_S^0$ and $\phi K^0_S$. I summarise the prospects for improving
the precision on these and related measurements.


title: First results on a search for light pseudoscalar sgoldstino in K- decays

abstract:
  A search for the light pseudoscalar sgoldstino production in three-body K-
decay K- --> pi-pi0 P has been performed with the ISTRA+ detector exposed to
the 25 GeV negative secondary of the U-70 proton synchrotron. No signal is
seen. Upper limits for the branching ratio at 90% confidence level vary between
2.0 10**-5 and 0.5 10**-5 in the effective mass m(P) range from 0 up to 190
MeV. Our results improve the limits published by the E787 Collaboration in the
mass interval between 0 and 120 MeV and are the first ones at higher masses.


title:
Color Transparency at COMPASS via Exclusive Coherent Vector Meson
  Production

abstract:
  We examine the potential of the COMPASS experiment at CERN to study color
transparency via exclusive coherent vector meson production in hard
muon-nucleus scattering. It is demonstrated that COMPASS has high sensitivity
to test this important prediction of perturbative QCD.


title: Study of Time-Dependent CP-Violating Asymmetries in b->sq q Decays

abstract:
  We present a measurement of CP-violation parameters in the b->sq q penguin
transitions (q=s,u,d) based on a 78/fb data sample collected at the Y(4S)
resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider.
One neutral B meson is reconstructed in the phiks, K+K-ks, or eta'ks decay
channel, and the flavor of the accompanying B meson is identified from its
decay products. CP violation parameters for each of the three modes are
obtained from the asymmetries in the distributions of the proper-time intervals
between the two B decays.


title:
Efficiency Correction in the Branching Fraction Measurements of psi(2S)
  Hadronic Decays

abstract:
  The detection efficiency correction for the particle identification and
kinematic fit selection criteria is investigated for the branching fraciton
measurements in the psi(2S) decays into omega pi pi, b1 pi, omega f2(1270),
omega K K, omega p pbar, phi pi pi, phi f0(980), phi K K and phi p pbar final
states using 4 millions psi(2S) data sample coolected at BEPC/BES. Based on the
corrected efficiencies, the preliminary results of these decay channels have
been obtained, and the "12%" rule predicted by perturbative QCD theory tested.


title:
Scaling violations and determination of alpha_s from jet production in
  gamma-p interactions at HERA

abstract:
  Differential cross sections for jet photoproduction in the reaction ep --> e
jet X have been measured with the ZEUS detector at HERA using 82.2 pb^-1 of
integrated luminosity. Inclusive jet cross sections are presented as a function
of the jet transverse energy, E_T^jet, for jets with E_T^jet > 17 GeV and
pseudorapidity -1 < eta^jet < 2.5, in the gamma-p centre-of-mass-energy range
142 < W_gamma-p < 293 GeV. Scaled jet invariant cross sections are presented as
a function of the dimensionless variable x_T = 2 E_T^jet/W_gamma-p for
<W_gamma-p> = 180 and 255 GeV. Next-to-leading-order QCD calculations give a
good description of the measured differential cross sections in both magnitude
and shape. The ratio of scaled jet invariant cross sections at the two
<W_gamma-p> values shows clear non-scaling behaviour. A value for the strong
coupling constant of alpha_s(M_Z) = 0.1224 +- 0.0001 (stat.) + 0.0022 - 0.0019
(exp.) + 0.0054 - 0.0042 (th.) has been extracted from a QCD analysis of the
measured dsigma/dE_T^jet. The variation of alpha_s with E_T^jet is in good
agreement with the running of alpha_s as predicted by QCD.


title: K+ photoproduction at SPring-8/LEPS

abstract:
  A series of experiments have been carried out by using a linearly polarized
photon beam at the SPring-8/LEPS facility from December 2000 to June 2001. The
photon beam asymmetries and differential cross sections of the
p(gamma,K+)Lambda and p(gamma,K+)Sigma^0 reactions have been measured in the
photon energy range from 1.5 GeV to 2.4 GeV at forward angles, 0 deg. <
Theta_cm < 60 deg.. We report preliminary results of the photon beam
asymmetries.


title: Observation of B0bar --> D0 K0bar and B0bar --> D0 K*0bar decays

abstract:
  We report on a search for B0bar --> D0 K(*)0bar decays based on 85 10^6 BBar
events collected with the Belle detector at KEKB. The B0bar --> D0 K0bar and
B0bar --> D0 K*0bar decays have been observed for the first time with the
branching fractions Br(B0bar --> D0 K0bar) = (5.0^{+1.3}_{-1.2}+- 0.6) 10^{-5}
and Br(B0bar --> D0 K*0bar) = (4.8^{+1.1}_{-1.0}+- 0.5) 10^{-5}. No significant
signal has been found for the B0bar --> D*0 K(*)0bar and B0bar --> D(*)0bar
K*0bar decay modes, and upper limits at 90% CL are presented.


title: Search for anti-electron-neutrinos from the Sun at Super-Kamiokande-I

abstract:
  We present the results of a search for low energy $\bar{\nu}_e$ from the Sun
using 1496 days of data from Super-Kamiokande-I. We observe no significant
excess of events and set an upper limit for the conversion probability to
$\bar{\nu}_e$ of the $^8$B solar neutrino. This conversion limit is 0.8% (90%
C.L.) of the standard solar model's neutrino flux for total energy = 8 MeV --
20 MeV. We also set a flux limit for monochromatic $\bar{\nu}_e$ for
$E_{\bar{\nu}_e}$ = 10 MeV -- 17 MeV.


title: Measurement of the CKM Matrix Element |Vub| with B->rho e nu Decays

abstract:
  We present a measurement of the branching fraction for the rare decays B->rho
e nu and extract a value for the magnitude of Vub, one of the smallest elements
of the Cabibbo-Kobayashi-Maskawa quark-mixing matrix. The results are given for
five different calculations of form factors used to parametrize the hadronic
current in semileptonic decays. Using a sample of 55 million BBbar meson pairs
recorded with the BABAR detector at the PEP-II e+e- storage ring, we obtain
Br(B0->rho- e+ nu)=(3.29 +-0.42 +-0.47 +-0.60) x 10^-4 and |Vub|=(3.64 +-0.22
+-0.25 +0.39-0.56)x10^-3, where the uncertainties are statistical, systematic,
and theoretical, respectively.


title: W Charge Asymmetry Measurement in CDF Run 2

abstract:
  We present the status of the forward-backward charge asymmetry measurement
for W boson production using early Run 2 data collected with the Collider
Detector at Fermilab (CDF). Tracking for forward electrons is a critical
component of this measurement, and we describe a new technique which combines
the position and energy measurements from the calorimeter with position
measurements in the silicon detector to provide tracking and charge
determination for electron candidates. The performance of this algorithm is
described and the sensitivity for the W charge asymmetry measurement with Run 2
data is quantified.


title: New Results from the Muon g-2 Experiment

abstract:
  The Muon g-2 collaboration has measured the anomalous magnetic g value, a =
(g-2)/2, of the positive muon with an unprecedented uncertainty of 0.7 parts
per million. The result, based on data collected in the year 2000 at Brookhaven
National Laboratory, is in good agreement with the preceding data. The
measurement tests standard model theory, which at the level of the current
experimental uncertainty involves quantum electrodynamics, quantum
chromodynamics, and electroweak interaction in a significant way.


title: Measurements of the Mass and Full-Width of the $\eta_c$ Meson

abstract:
  In a sample of 58 million $J/\psi$ events collected with the BES II detector,
the process J/$\psi\to\gamma\eta_c$ is observed in five different decay
channels: $\gamma K^+K^-\pi^+\pi^-$, $\gamma\pi^+\pi^-\pi^+\pi^-$, $\gamma
K^\pm K^0_S \pi^\mp$ (with $K^0_S\to\pi^+\pi^-$), $\gamma \phi\phi$ (with
$\phi\to K^+K^-$) and $\gamma p\bar{p}$. From a combined fit of all five
channels, we determine the mass and full-width of $\eta_c$ to be
$m_{\eta_c}=2977.5\pm1.0 ({stat.})\pm1.2 ({syst.})$ MeV/$c^2$ and
$\Gamma_{\eta_c} = 17.0\pm3.7 ({stat.})\pm7.4 ({syst.})$ MeV/$c^2$.


title:
Measurement of Beam-Spin Asymmetries for Deep Inelastic $\pi^+$
  Electroproduction

abstract:
  We report the first evidence for a non-zero beam-spin azimuthal asymmetry in
the electroproduction of positive pions in the deep-inelastic region. Data have
been obtained using a polarized electron beam of 4.3 GeV with the CLAS detector
at the Thomas Jefferson National Accelerator Facility (JLab). The amplitude of
the $\sin\phi$ modulation increases with the momentum of the pion relative to
the virtual photon, $z$, with an average amplitude of $0.038 \pm 0.005 \pm
0.003$ for $0.5 < z < 0.8$ range.


title: R&D on the Gem Readout of the Tesla TPC

abstract:
  Ongoing studies for the TESLA TPC with GEM readout at DESY/Hamburg University
are presented. They include basic GEM performances, tracking and the
determination of the resolution using different pad sizes and geometries as
well as ion feedback measurements.


title: Tevatron Physics

abstract:
  These lectures form a personal, and not necessarily comprehensive, survey of
physics at the Fermilab Tevatron proton-antiproton collider. They cover
detectors, analysis issues, and physics prospects for the current Tevatron run.
(Version 2 has typographic corrections).


title: Performance of large area Micro Pixel Chamber

abstract:
  A novel gaseous two-dimensional imaging detector "Micro Pixel Chamber
(micro-PIC)" has been developed. This detector is based on double sided printed
circuit board (PCB). We have developed large area (10cm x 10cm) micro-PICs with
65536 pixel anodes of 400um pitch on a 100um thick insulating substrate.
Achieved energy resolution was 30% (FWHM) at 5.9keV, and a gas gain of 7000 was
obtained with argon ethane (8:2) gas mixture. This gain is high enough to
detect minimum ionizing particles with such a small electrode pitch. Although
several discharges occurred during 65 hours continuous operation, the detectors
have kept stable operation with high gain. The micro-PIC is a useful detector
for many applications e.g. X-ray, gamma ray, and charged particle imaging. The
micro electrode structure allows us to measure directions of primary electrons
due to incident X-rays or gamma rays, which provide a strong method for X-ray
polarimetry and gamma-ray imaging.


title: Development of a time projection chamber with micro pixel electrodes

abstract:
  A time projection chamber (TPC) based on a gaseous chamber with micro pixel
electrodes (micro-PIC) has been developed for measuring three-dimensional
tracks of charged particles. The micro-PIC with a detection area of 10 cm
square consists of a double-sided printing circuit board. Anode pixels are
formed with 0.4 mm pitch on strips aligned perpendicular to the cathode strips
in order to obtain a two-dimensional position. In the TPC with drift length of
8 cm, 4 mm wide field cage electrodes are aligned at 1mm spaces and a uniform
electric field of about 0.4 kV/cm is produced. For encoding of the
three-dimensional position a synchronous readout system has been developed
using Field Programmable Gate Arrays with 40 MHz clock. This system enables us
to reconstruct the three-dimensional track of the particle at successive points
like a cloud chamber even at high event rate. The drift velocity of electrons
in the TPC was measured with the tracks of cosmic muons for three days, during
which the TPC worked stably with the gas gain of 3000. With a radioisotope of
gamma-ray source the three-dimensional track of a Compton scattered electron
was taken successfully.


title: The Time-of-Flight Technique for the HERMES Experiment

abstract:
  This paper describes the use of the time-of-flight (TOF) technique as a
particle identification method for the HERMES experiment. The time-of-flight is
measured by two 1x4 m^2 scintillation hodoscopes that initially were designed
for the first-level trigger only. However, the suitable time structure of the
HERA electron beam allows an extension of their functions to also measure the
TOF for low momentum hadron identification. Using only these conventional
hodoscopes, good particle identification was achieved for protons and pions in
the momentum range up to 2.9GeV/c and for kaons up to 1.5GeV/c.


title: Mixing in the D0 system - Results from collider experiments

abstract:
  Mixing in the D0 system may provide a sensitive probe for new physics beyond
the Standard Model (SM) but has so far eluded experimental observation. The SM
predictions are typically small (< 10^{-3}) for the mixing parameters x, y
which, in the absence of charge-parity (CP) symmetry violation, measure the
mass (x= Delta(m)/Gamma) and lifetime (y= Delta(Gamma)/2Gamma) difference of
the CP eigenstates in the D0 system. The asymmetric B-factory experiments BABAR
and Belle open up the opportunity of measuring x, y with unprecedented
statistical precision and sample purities. Results from BABAR and Belle, and
from CLEO are reviewed.


title: Performance of the TPC with Micro Pixel Chamber Readout: micro-TPC

abstract:
  Micro-TPC, a time projection chamber(TPC) with micro pixel chamber($\mu$-PIC)
readout was developed for the detection of the three-dimensional fine(sub-m
illimeter) tracks of charged particles. We developed a two-dimensional position
sensitive gaseous detector, or the $\mu$-PIC, with the detection area of
10$\times$10 cm${}^{2}$ and 65536 anode electrodes of 400 $\mu$m pitch. We
achieved the gas gain of over 10000 without any other multipliers. With the
pipe-line readout system specially developed for the $\mu$-PIC, we detected
X-rays at the rate as high as 7.7 Mcps. We attached a drift cage with an 8 cm
drift length to the $\mu$-PIC and developed a micro-TPC. We measured the basic
performances of the micro-TPC and took three-dimensional tracks of electrons.
We also developed a prototype of the MeV gamma-ray imaging detector which is a
hybrid of the micro-TPC and NaI(Tl) scintillators and confirmed its concept by
reconstructing the obtained data.


title:
Di-Jet Production in Photon-Photon colisions at sqrt(s)ee from 189 to
  209 GeV

abstract:
  Di-jet producion is studied in collisions of quasi-real photons at e+e-
centre- of-mass energies sqrt(s)ee from 189 to 209 GeV at LEP. The data were
collected with the OPAL detector. Jets are reconstructed using an inclusive k_t
clustering algorithm for all cross-section measurements presented. A cone jet
algorithm is used in addition to study the different structure of the jets
resulting from either of the algorithms. The inclusive di-jet cross-section is
measured as a function of the mean transverse energy Etm(jet) of the two
leading jets, and as a functiuon of the estimated fraction of the photon
momentum carried by the parton entering the hard sub-process, xg, for different
regions of Etm (jet). Angular distribution in di-jet events are measured and
used to demonstrate the dominance of quark and gluon initiated processes in
different regions of phase space. Furthermore the inclusive di-jet
cross-section as a function of |eta(jet)| and |delta eta (jet)| is presented
where eta(jet) is the jet pseudo-rapidity. Different regions of the xg+ -xg-
-space are explored to study and control the influence of an underlying event.
The results are compared to next-to-leading order perturbative QCD calculations
and to the predictions of the leading order Monte Carlo generator PYTHIA.


title:
Selection and reconstruction of the top quarks in the all-hadronic
  decays at a Linear Collider

abstract:
  A method of reconstruction of the top quarks produced in the process E+E- ->
t\bar{t} -> 6 jets at a Linear Collider (LC) is proposed. The approach does not
involve a kinematic fit, as well as assumptions on the invariant masses of the
dijets originating from the decays of W bosons and, therefore, the method is
expected to be less sensitive to theoretical and experimental uncertainties on
the top-mass measurement than traditional reconstruction methods. For the first
time, the reconstruction of the top quarks was investigated using the full LC
detector simulation after taking into account the background arising from QCD
multi-jet production.


title: Modeling skin effect in large magnetized iron detectors

abstract:
  The experimental problem of the calibration of magnetic field in large iron
detectors is discussed. Emphasis is laid on techniques based on ballistic
measurements as the ones employed by MINOS or OPERA.In particular, we provide
analytical formulas to model the behavior of the apparatus in the transient
regime, keeping into account eddy current effects and the finite penetration
velocity of the driving fields. These formulas ease substantially the design of
the calibration apparatus.Results are compared with experimental data coming
from a prototype of the OPERA spectrometer.


title: Recent B physics results from CLEO

abstract:
  The CLEO detector is located at the CESR e+e- collider in Ithaca, NY. CLEO's
wide range of experimental measurements in b-hadron decays is represented by
improved measurements of Vcb and Vub, rare B decays, and bb-bar spectroscopy.
New experimental results in exclusive hadronic transitions will aid theorists
in developing a theory of hadronic B decays. Such a theory will have
consequences for the extraction of angles of the unitarity triangle, especially
gamma. Recently, the CLEO collaboration has shifted its focus towards precision
measurements at lower energies. Based on the new Y(3S) data, we present the
observation of a new bound bb-bar state. An outlook on the planned running at
tau/charm-energies (CLEO-c) is given and implications for b-physics are
discussed.


title:
Search for neutrino oscillations on a long base-line at the CHOOZ
  nuclear power station

abstract:
  This final article about the CHOOZ experiment presents a complete description
of the electron antineutrino source and detector, the calibration methods and
stability checks, the event reconstruction procedures and the Monte Carlo
simulation. The data analysis, systematic effects and the methods used to reach
our conclusions are fully discussed. Some new remarks are presented on the
deduction of the confidence limits and on the correct treatment of systematic
errors.


title:
A Measurement of Semileptonic B Decays to Narrow Orbitally-Excited Charm
  Mesons

abstract:
  The decay chain b -> Bbar -> D^{**0} l nu X, D^{**0} -> D^{*+} pi^-, D^{*+}
-> D^0 pi^+, D^0 ->(Kpi or K3pi) is identified in a sample of 3.9 million
hadronic Z decays collected with the OPAL detector at LEP. The branching ratio
BR (b -> Bbar) x BR (Bbar -> D^0_1 l nu X) x BR (D^0_1 -> D^{*+} pi^-) is
measured to be (2.64 +- 0.79 (stat) +- 0.39 (syst)) X 10^-3 for the J^P = 1^+
(D^0_1) state. For decays into the J^P = 2^+ (D^{*0}_2) state, an upper limit
of 1.4 X 10^-3 is placed on the branching ratio at the 95% confidence level.


title: Prospects of Discovery for Supersymmetry at the Tevatron

abstract:
  We summarize a discovery potential for supersymmetric particles at the \ppbar
collider of Tevatron with center-of-mass energy \sqrt{s} = 2 TeV and integrated
luminosity $\intlum$ = 15-30 \invfb. Any direct search is kinematically limited
to below 450 \mgev. We, however, have a unique opportunity to test various
supersymmetric scenarios by a measurement of the branching ratio for the rare
decay mode \bsmumu. Using the background estimate in the CDF analysis of
\bsmumu in Run I, we investigate the prospects for studying this mode in Run
II. CDF would be sensitive to this decay for a branching ratio > 1.2 \times
10^{-8} with 15 \invfb (or, if a similar analysis holds for \Dzero, >6.5\times
10^{-9} for the combined data). For \tanb > 30, the \bsmumu search can probe
the SUSY parameter space that cannot be probed by direct production of SUSY
particles at Run II. An observation of \bsmumu with a large branching ratio >
7(14) \times 10^{-8} (feasible with only 2 \invfb) would be sufficient to
exclude the mSUGRA model for \tan\beta \leq 50 (55) including other
experimental constraints. For some models, the branching ratio can be large
enough to be detected even for small $\tan\beta$ and large \mhalf.


title:
Evidence for Narrow S=+1 Baryon Resonance in Photo-production from
  Neutron

abstract:
  The gamma n -> K+ K- n reaction on 12C has been studied by measuring both K+
and K- at forward angles. A sharp baryon resonance peak was observed at 1.54 +-
0.01 GeV with a width smaller than 25 MeV and a Gaussian significance of 4.6
sigma. The strangeness quantum number (S) of the baryon resonance is +1. It can
be interpreted as a molecular meson-baryon resonance or alternatively as an
exotic 5-quark state (uudd{s_bar}) that decays into a K+ and a neutron. The
resonance is consistent with the lowest member of an anti-decuplet of baryons
predicted by the chiral soliton model.


title: t \bar{t} Cross-Section and Forward-Backward Asymmetry at CLIC

abstract:
  A top-quark reconstruction method for CLIC is described. The reconstructed
events are used to measure the e+ e- -> t \bar{t} cross-section as well as the
forward-backward asymmetry. The results suggest that the relative measurement
accuracy for the cross-section will be 1.4 % and for the asymmetry 4.2 % for 1
ab^{-1} of data.


title: Measurements of diffractive processes at HERA

abstract:
  In this talk, the recent data on diffractive electron-proton interactions at
HERA are reviewed. The question of diffraction as a soft or hard process is
addressed and discussed in the context of inclusive diffraction, vector meson
production and the DVCS process.


title:
Hybrid Meson Production via Pion Scattering from the Nuclear Coulomb
  Field

abstract:
  The CERN COMPASS experiment can use 100-280 GeV pion and kaon beams and
magnetic spectrometers and calorimeters to measure Hybrid (mixed quark-gluon)
meson production cross sections in the Primakoff scattering of high energy
pions and kaons from virtual photons in the Coulomb field of High-Z targets.
There are many advantages to studying such processes via the Primakoff
reactions pi- gamma --> Hybrid --> rho pi, eta pi, eta' pi, pi b1, pi f1, and
similar reactions with a K- beam. Such data should provide significant input
for gaining a better understanding of non-perturbative QCD. A brief description
and update of this program is presented.


title: Pion and Kaon Polarizabilities at CERN COMPASS

abstract:
  The electric alpha and magnetic beta pion Compton polarizabilities
characterize the pion's deformation in the electromagnetic field of the gamma
during gamma-pi Compton scattering. The pion polarizabilities are key
observables, and provide stringent tests of our understanding of chiral
symmetry, its spontaneous breakdown, the role of explicit symmetry breaking in
QCD. The chi_PT effective Lagrangian, using data from radiative pion beta
decay, predicts the pion electric and magnetic polarizabilities alpha = -beta =
2.7 +- 0.4, in standard polarizability units. The polarizabilities deduced by
Antipov et al. in their low statistics Primakoff experiment (~ 7000 events)
were about three times larger than this prediction. For pion polarizability,
gamma-pi scattering will be measured in CERN COMPASS via radiative pion
Primakoff scattering (pion Bremsstrahlung) in the nuclear Coulomb field: pi + Z
--> pi' + gamma + Z; equivalent to gamma + pi --> gamma + pi Compton scattering
for laboratory gamma's of order 1 GeV incident on a target pion at rest. The
pion polarizabilities are determined by their effect on the shape of the
measured gamma-pi Compton scattering angular distribution. One can expect from
COMPASS a total measurement uncertainty for alpha of order 0.4 for the pion
polarizability. COMPASS can also carry out a first measurement of Kaon
ploarizabilities. New high precision pion and Kaon polarizability measurements
via radiative pion and Kaon scattering data from COMPASS will provide important
new tests of the QCD chiral dynamics polarizability prediction.


title: Inclusive Charged Hadron Production in Two-Photon Collisions at LEP

abstract:
  Inclusive charged hadron production, e+e- -> e+e- h+- X, is studied using 414
pb-1 of data collected at LEP with the L3 detector at centre-of-mass energies
between 189 and 202 GeV. Single particle inclusive differential cross sections
are measured as a function of the particle transverse momentum, pt, and
pseudo-rapidity, eta. For p_t < 1.5 GeV, the data are well described by an
exponential, typical of soft hadronic processes. For higher pt, the onset of
perturbative QCD processes is observed. The pi+- production cross section for
pt > 5 GeV is much higher than the NLO QCD predictions.


title:
Proper-time Resolution Function for Measurement of Time Evolution of B
  Mesons at the KEK B-Factory

abstract:
  The proper-time resolution function for the measurement of the time evolution
of B mesons with the Belle detector at KEKB is studied in detail. The obtained
resolution function is applied to the measurement of B meson lifetimes, the
B0-B0bar oscillation frequency and time-dependent CP asymmetries.


title: Measurement of W Polarisation at LEP

abstract:
  The three different helicity states of W bosons produced in the reaction e+
e- -> W+ W- -> l nu q q~ at LEP are studied using leptonic and hadronic W
decays. Data at centre-of-mass energies \sqrt s = 183-209 GeV are used to
measure the polarisation of W bosons, and its dependence on the W boson
production angle. The fraction of longitudinally polarised W bosons is measured
to be 0.218 \pm 0.027 \pm 0.016 where the first uncertainty is statistical and
the second systematic, in agreement with the Standard Model expectation.


title:
Measurements of the Branching Fractions and Helicity Amplitudes in B -->
  D* rho Decays

abstract:
  Using 9.1 fb-1 of e+ e- data collected at the Upsilon(4S) with the CLEO
detector using the Cornell Electron Storage Ring, measurements are reported for
both the branching fractions and the helicity amplitudes for the decays B- ->
D*0 rho- and B0bar -> D*+ rho-. The fraction of longitudinal polarization in
B0bar -> D*+ rho- is found to be consistent with that in B0bar -> D*+ l- nubar
at q^2 = M^2_rho, indicating that the factorization approximation works well.
The longitudinal polarization in the B- mode is similar. The measurements also
show evidence of non-trivial final-state interaction phases for the helicity
amplitudes.


title: The SLAC Polarized Electron Source and Beam for E-158

abstract:
  SLAC E-158 is making the first measurement of parity violation in Moller
scattering. E-158 measures the right-left cross-section asymmetry, A_LR, in the
scattering of a 45-GeV polarized electron beam off unpolarized electrons in a
liquid hydrogen target. E-158 plans to measure the expected Standard Model
asymmetry of ~10^-7 to an accuracy of better than 10^-8. This paper discusses
the performance of the SLAC polarized electron source and beam during E-158's
first physics run in April/May 2002.


title:
Isolated electrons and muons in events with missing transverse momentum
  at HERA

abstract:
  A search for events with a high energy isolated electron or muon and missing
transverse momentum has been performed at the electron-proton collider HERA
using an integrated luminosity of 13.6 pb-1 in e-p scattering and 104.7 pb-1 in
e+p scattering. Within the Standard Model such events are expected to be mainly
due to W boson production with subsequent leptonic decay. In e-p interactions
one event is observed in the electron channel and none in the muon channel,
consistent with the expectation of the Standard Model. In the e+p data a total
of 18 events are seen in the electron and muon channels compared to an
expectation of 12.4 \pm 1.7 dominated by W production (9.4 \pm 1.6). Whilst the
overall observed number of events is broadly in agreement with the number
predicted by the Standard Model, there is an excess of events with transverse
momentum of the hadronic system greater than 25 GeV with 10 events found
compared to 2.9 \pm 0.5 expected. The results are used to determine the cross
section for events with an isolated electron or muon and missing transverse
momentum.


title:
Measurement Of Continuum Dimuon Production In 800-GeV/C Proton-Nucleon
  Collisions

abstract:
  Fermilab Experiment 866 has performed an absolute measurement of continuum
dimuon (Drell-Yan) cross sections in 800-GeV/c $pp$ and $pd$ interactions.
Results differential in the mass, Feynman-$x$ ($x_F$) and transverse momenta
($p_T$) of the dimuon pairs are reported. These results represent the most
extensive study of the Drell-Yan process to date, based on a data sample of
175,000 dimuon events covering the widest range in kinematics yet achieved
($4.2 \leq M \leq 16.85$ GeV and $-0.05 \leq x_F \leq 0.8$) with this level of
precision. The cross sections are primarily sensitive to the magnitude and
shape of the light antiquark distributions ($\bar{d}(x)$ and $\bar{u}(x)$) in
the nucleon, but also provide important information on the valence quarks as
well as the gluons. They are in good agreement with other existing
proton-induced Drell-Yan experiments. There is also general agreement between
the data and next-to-leading-order calculations based on various sets of parton
distribution functions. Differences between data and theory are examined, and
the potential impact of these data on future parameterizations of the parton
distributions are discussed.


title:
Evidence for CP-Violating Asymmetries in B0->pi+pi- Decays and
  Constraints on the CKM Angle phi2

abstract:
  We present an improved measurement of CP-violating asymmetries in B0 -> pi+
pi- decays based on a 78 fb^-1 data sample collected at the Y(4S) resonance
with the Belle detector at the KEKB asymmetric-energy e+e- collider. We
reconstruct one neutral B meson as a B0 -> pi+ pi- CP eigenstate and identify
the flavor of the accompanying B meson from inclusive properties of its decay
products. We apply an unbinned maximum likelihood fit to the distribution of
the time intervals between the two B meson decay points. The fit yields the
CP-violating asymmetry amplitudes Apipi = +0.77+/-0.27(stat)+/-0.08(syst) and
Spipi = -1.23+/-0.41(stat)+0.08/-0.07(syst), where the statistical
uncertainties are determined from Monte Carlo pseudo-experiments. We obtain
confidence intervals for CP-violating asymmetry parameters Apipi and Spipi
based on a frequentist approach. We rule out the CP-conserving case,
Apipi=Spipi=0, at the 99.93% confidence level. We discuss how these results
constrain the value of the CKM angle phi2.


title: The proton structure function F2 in the resonance region

abstract:
  Unique measurement of the proton structure function F2 in a wide
two-dimensional region of x and Q**2 has been reported. The accessible
kinematics covers entire resonance region up to W=2.5 GeV in the Q**2 interval
from 0.1 to 4.5 GeV**2. Obtained data allowed for the first time an evaluation
of moments of the structure function F2 directly from experimental data as well
as an intensive study of the Bloom-Gilman duality phenomenon.


title:
Measurement of the inclusive D*+- production in gamma-gamma collisions
  at LEP

abstract:
  The inclusive production of D$^{*\pm}$ mesons in two-photon collisions is
measured with the ALEPH detector at $\epem$ centre-of-mass energies from
183$\unit{GeV}$ to 209$\unit{GeV}$. A total of $360 \pm 27$ D$^{*\pm}$ meson
events were observed from an integrated luminosity of 699\unit{pb^{-1}}$.
Contributions from direct and single-resolved rocesses are separated using the
ratio of the transverse momentum $p_{\rm t}^{\rm D^{*\pm}}$ of the D$^{*\pm}$
to the visible invariant mass $W_{\mathrm{vis}}$ of the event. Differential
cross sections of D$^{*\pm}$ production as functions of $p_{\rm t}^{\rm
D^{*\pm}}$ and the pseudorapidity $|\eta^{\rm D^{*\pm}}| $ are measured in the
range $ 2\unit{GeV}/c < p_{\rm t}^{\rm D^{*\pm}} < 12\unit{GeV}/c $ and $
|\eta^{\rm D^{*\pm}}| < 1.5 $. They are compared to next-to-leading order
(NLO)perturbative QCD calculations. The extrapolation of the integrated visible
D$^{*\pm}$ cross section to the total charm cross section, based on the Pythia
Monte Carlo program, yields $ \sigma (\epem \to \epem \ccbar)_ {=197\unit{GeV}}
= 731 \pm 74_{\mathrm{stat}} \pm 47_{\mathrm{syst}} \pm 157_{\mathrm{extr}}
\unit{pb} $.


title: Spectral functions from Hadronic Tau Decays and QCD

abstract:
  Hadronic decays of the $\tau$ lepton provide a clean environment to study
hadron dynamics in an energy regime dominated by resonances, with the
interesting information captured in the spectral functions. Recent results from
ALEPH on exclusive channels are presented, with some emphasis on the $\pi \piz$
final state which plays a crucial role for the determination of the hadronic
contribution to the muon anomalous magnetic moment. Inclusive spectral
functions are the basis for QCD analyses, delivering an accurate determination
of the strong coupling constant, quantitative information on nonperturbative
contributions and a measurement of the mass of the strange quark.


title:
Modeling Neutrino and Electron Scattering Cross Sections in the Few GeV
  Region with Effective $LO PDFs$

abstract:
  We use new scaling variables $x_w$ and $\xi_w$, and add low $Q^2$
modifications to GRV94 and GRV98 leading order parton distribution functions
such that they can be used to model electron, muon and neutrino inelastic
scattering cross sections (and also photoproduction) at both very low and high
energie.


title:
Measurement of gamma-gamma and gamma-electron luminosities at photon
  colliders

abstract:
  Methods of gamma-gamma, gamma-electron luminosities measurement at photon
colliders based on Compton scattering of laser photons on high energy electrons
at linear colliders are considered.


title: Neutron background at Boulby mine

abstract:
  The neutron background at the underground laboratory at Boulby - a site for
several dark matter experiments - is discussed. Special emphasis is put on the
neutron background produced by cosmic-ray muons. The most recent versions of
the muon propagation code MUSIC, and particle transport code FLUKA are used to
evaluate muon and neutron fluxes. The results of simulations are compared with
experimental data.


title: The NAIAD experiment for WIMP searches at Boulby mine and recent results

abstract:
  The NAIAD experiment (NaI Advanced Detector) for WIMP dark matter searches at
Boulby mine (UK) is described. The detector consists of an array of
encapsulated and unencapsulated NaI(Tl) crystals with high light yield. Six
crystals are collecting data at present. Data accumulated by four of them (10.6
kg x year exposure) have been used to set upper limits on the WIMP-nucleon
spin-independent and WIMP-proton spin-dependent cross-sections. Pulse shape
analysis has been applied to discriminate between nuclear recoils, as may be
caused by WIMP interactions, and electron recoils due to gamma background.
Various calibrations of crystals are presented.


title: High statistics measurement of Ke4 decay properties

abstract:
  We report experimental details and results of a new measurement of the decay
K+ -> pi+pi-e+nue (Ke4}. A sample of more than 400,000 Ke4 events with low
background has been collected by Experiment 865 at the Brookhaven Alternate
Gradient Synchrotron. From these data, the branching ratio
(4.11+-0.01+-0.11)*10**(-5) and the pi-pi invariant mass dependence of the form
factors F, G, and H of the weak hadronic current as well as the phase shift
difference delta00-delta11 for pi-pi-scattering were extracted. Using
constraints based on analyticity and chiral symmetry, a new value with
considerably improved accuracy for the s-wave pi-pi-scattering length a00 has
been obtained also: a00=0.216+-0.013 (stat.)+-0.002(syst.)+-0.002(theor.).


title:
Apparatus for a Search for T-violating Muon Polarization in Stopped-Kaon
  Decays

abstract:
  The detector built at KEK to search for T-violating transverse muon
polarization in K+ --> pi0 mu+ nu (Kmu3) decay of stopped kaons is described.
Sensitivity to the transverse polarization component is obtained from
reconstruction of the decay plane by tracking the mu+ through a toroidal
spectrometer and detecting the pi0 in a segmented CsI(Tl) photon calorimeter.
The muon polarization was obtained from the decay positron asymmetry of muons
stopped in a polarimeter. The detector included features which minimized
systematic errors while maintaining high acceptance.


title:
New limits on nucleon decays into invisible channels with the BOREXINO
  Counting Test Facility

abstract:
  The results of background measurements with the second version of the
BOREXINO Counting Test Facility (CTF-II), installed in the Gran Sasso
Underground Laboratory, were used to obtain limits on the instability of
nucleons, bounded in nuclei, for decays into invisible channels ($inv$):
disappearance, decays to neutrinos, etc. The approach consisted of a search for
decays of unstable nuclides resulting from $N$ and $NN$ decays of parents
$^{12}$C, $^{13}$C and $^{16}$O nuclei in the liquid scintillator and the water
shield of the CTF. Due to the extremely low background and the large mass (4.2
ton) of the CTF detector, the most stringent (or competitive) up-to-date
experimental bounds have been established: $\tau(n \to inv) > 1.8 \cdot
10^{25}$ y, $\tau(p \to inv) > 1.1 \cdot 10^{26}$ y, $\tau(nn \to inv) > 4.9
\cdot 10^{25}$ y and $\tau(pp \to inv) > 5.0 \cdot 10^{25}$ y, all at 90% C.L.


title:
A measurement of the gluon splitting rate into ccbar pairs in hadronic Z
  decays

abstract:
  The rate of gluons splitting into $c \bar{c}$ pairs in hadronic $Z$ decays is
measured using the data sample collected by ALEPH from 1991 to 1995. The
selection is based on the identification of leptons (electrons and muons)
originating from semileptonic charm decays, and on the topological properties
of signal events. The result derived from the selected sample is $g_{c
\bar{c}}=(3.26 \pm 0.23 \rm{(stat)} \pm 0.42 \rm{(syst)}) %$


title:
Experimental study of the e+e- -> pi0 gamma process in the energy region
  sqrt(s)=0.60-0.97 GeV

abstract:
  Results of the study of the e+e-->pi0 gamma process with SND detector at
VEPP-2M collider in the c.m.s. energy range sqrt(s)=0.60-0.97 GeV are
presented. Using 36513 selected events corresponding to a total integrated
luminosity of 3.4 pb^-1 the e+e-->pi0 gamma cross section was measured. The
energy dependence of the cross section was analyzed in the framework of the
vector meson dominance model. The data are well described by a sum of
phi,omega,rho0->pi0 gamma decay contributions with measured decay
probabilities: Br(omega->pi0 gamma)=(9.34+-0.15+-0.31)% and Br(rho0->pi0
gamma)=(5.15+-1.16+-0.73)*10^-4 . The rho-omega relative interference phase is
phi(rho,omega}=(-10.2+-6.5+-2.5) degree.


title: Physics Potential of the SPL Super Beam

abstract:
  Performances of a neutrino beam generated by the CERN SPL proton driver are
computed considering a 440 kton water Cerenkov detector at 130 km from the
target. $\theta_{13}$ sensitivity down to $1.2^\circ$ and a $\delta$
sensitivity comparable to a Neutrino Factory, for $\theta_{13} \geq 3^\circ$,
are within the reach of such a project.


title: A bolometric measurement of the antineutrino mass

abstract:
  High statistics calorimetric measurements of the beta spectrum of 187Re are
being performed with arrays of silver perrhenate crystals operated at low
temperature. After a modification of the experimental set-up, which allowed to
substantially reduce the background of spurious counts and therefore to
increase the sensitivity on the electron antineutrino mass, a new measurement
with 10 silver perrhenate microbolometers is running since July 2002. The
crystals have masses between 250 and 350 micrograms and their average FWHM
energy resolution, constantly monitored by means of fluorescence X-rays, is of
28.3 eV at the beta end-point. The Kurie plot collected during 4485 hours x mg
effective running time has an end-point energy of 2466.1 +/- 0.8{stat} +/- 1.5
{syst} eV, while the half lifetime of the decay is found to be 43.2 +/-
0.2{stat} +/- 0.1{syst} Gy. These values are the most precise obtained so far
for 187Re. From the fit of the Kurie plot we can deduce a value for the squared
electron antineutrino mass m(nu)^2 of 147 +/- 237{stat} +/- 90{syst} eV^2. The
corresponding 90% C.L. upper limit for m(nu) is 21.7 eV.


title: Physics Reach of the Beta Beam

abstract:
  Beta Beams are designed to produce pure (anti)electron neutrino beams and
could be an elegant and powerful option for the search of leptonic CP violating
processes. In this paper will be quantified the physics reach of a CERN based
Beta Beam and of a Super Beam - Beta Beam combination. The CP phase $\delta$
sensitivity results to be comparable to a Neutrino Factory for
$\sin^2{\theta_{13}}$ values greater than $10^{-4}$.


title: Gamma-ray Polarimetry

abstract:
  An astrophysics application of a low noise Double-sided Silicon Strip
Detector (DSSD) is described. A Semiconductor Multiple-Compton Telescope (SMCT)
is being developed to explore the gamma-ray universe in the 0.1-20 MeV energy
band. Excellent energy resolution and polarization sensitivity are key features
of the SMCT. We have developed prototype modules for a low noise DSSD system,
which reached an energy resolution of 1.3 keV (FWHM) for 122 keV at 0 degree C.
Results of a gamma-ray imaging test are also presented.


title:
Search for the Supersymmetric Partner of the Top Quark in Dilepton
  Events from p-pbar Collisions at 1.8 TeV

abstract:
  We have searched for the supersymmetric partner of the top quark (stop) in
107 pb^{-1} of p-pbar collisions at \sqrt{s}= 1.8 TeV collected by the Collider
Detector at Fermilab (CDF). Within the framework of the Minimal Supersymmetric
extension of the Standard Model (MSSM) each of the pair-produced stops is
assumed to decay into a lepton, bottom quark and supersymmetric neutrino. Such
a scenario would give rise to events with two leptons, two hadronic jets, and a
substantial imbalance of transverse energy. No evidence of such a stop signal
has been found. We calculate a 95% confidence level (C.L.) upper limit on the
stop production cross section, which excludes stop masses in the region
(80<m_{\stop}<135 GeV/c^2) in the mass plane of stop versus sneutrino.


title: Search for single-top production in ep collisions at HERA

abstract:
  A search for single-top production, ep --> etX, has been made with the ZEUS
detector at HERA using an integrated luminosity of 130.1 pb-1. Events from both
the leptonic and hadronic decay channels of the W boson resulting from the
decay of the top quark were sought. For the leptonic mode, the search was made
for events with isolated high-energy leptons and significant missing transverse
momentum. For the hadronic decay mode, three-jet events in which two of the
jets had an invariant mass consistent with that of the W were selected. No
evidence for top production was found. The results are used to constrain
single-top production via flavour-changing neutral current (FCNC) transitions.
The ZEUS limit excludes a substantial region in the FCNC t-u-gamma coupling not
ruled out by other experiments.


title: Magnetic Monopole Searches

abstract:
  In this lecture notes will be discussed the status of the searches (i) for
classical Dirac Magnetic Monopoles (MMs) at accelerators, (ii) for GUT
superheavy MMs in the penetrating cosmic radiation and (iii) for Intermediate
Mass MMs in the cosmic radiation underground, underwater and at high altitude.
An outlook and a discussion on future searches follows.


title:
Double-spin asymmetries in the cross section of $\rho^0$ and $\phi$
  production at intermediate energies

abstract:
  Double-spin asymmetries in the cross section of electroproduction of $\rho^0$
and $\phi$ mesons on the proton and deuteron are measured at the HERMES
experiment. The photoabsorption asymmetry in exclusive $\rho^0$
electroproduction on the proton exhibits a positive tendency. This is
consistent with theoretical predictions that the exchange of an object with
unnatural parity contributes to exclusive $\rho^0$ electroproduction by
transverse photons. The photoabsorption asymmetry on the deuteron is found to
be consistent with zero. Double-spin asymmetries in $\rho^0$ and $\phi $ meson
electroproduction by quasi-real photons were also found to be consistent with
zero; the asymmetry in the case of the $\phi$ meson is compatible with a
theoretical prediction which involves $s\bar{s}$ knockout from the nucleon.


title:
Multi-ring signatures of the oscillation nu_mu --> nu_e in a water
  Cherenkov detector

abstract:
  Multiring signatures of the oscillation nu_mu --> nu_e are formulated for a
water Cherenkov detector. These are appropriate for relatively high neutrino
energies (over 2 GeV) that emphasize the matter effect and, therefore, may
allow to measure the sign of the atmospheric mass-squared difference.


title:
Search for Large Extra Dimensions in the Monojet + Missing ET Channel at
  D0

abstract:
  We present a search for large extra dimensions (ED) in p-pbar collisions at a
center-of-mass energy of 1.8 TeV using data collected by the D0 detector at the
Fermilab Tevatron in 1994-1996. Data corresponding to 78.8 +/- 3.9 pb^-1 are
examined for events with large missing transverse energy, one high-p_T jet, and
no isolated muons. With no excess beyond the background prediction from the
standard model, we place limits on the fundamental Planck scale of 1 TeV (0.6
TeV) for 2 (7) ED.


title:
Measurement of B0->D_s(*)+D*- Branching Fractions and B0->D_s*+D*-
  Polarization with a Partial Reconstruction Technique

abstract:
  We present a study of the decays B0->D_s(*)+D*-, using 20.8 fb-1 of e+e-
annihilation data recorded with the BABAR detector. The analysis is conducted
with a partial reconstruction technique, in which only the D_s(*)+ and the soft
pion from the D*- decay are reconstructed. We measure the branching fractions
BR(B0->D_s+D*-) = (1.03 +/- 0.14 +/- 0.13 +/- 0.26)% and BR(B0->D_s*+D*-) =
(1.97 +/- 0.15 +/- 0.30 +/- 0.49)%, where the first error is statistical, the
second is systematic, and the third is the error due to the D_s+->phi pi+
branching fraction uncertainty. From the B0->D_s*+D*- angular distributions, we
measure the fraction of longitudinal polarization Gamma_L/Gamma = (51.9 +/- 5.0
+/- 2.8)%, which is consistent with theoretical predictions based on
factorization.


title: CDF - Run II Status and Prospect

abstract:
  After a five year upgrade period, the CDF detector located at the Fermilab
Tevatron Collider is back in operation taking high quality data with all
subsystems functional. We report on the status of the CDF experiment in Run II
and discuss the start-up of the Tevatron accelerator. First physics results
from CDF are presented. We also discuss the prospects for B physics in Run II,
in particular the measurements of Bs flavour oscillations and CP violation in B
decays.


title: Improved limits on nuebar emission from mu+ decay

abstract:
  We investigated mu+ decays at rest produced at the ISIS beam stop target.
Lepton flavor (LF) conservation has been tested by searching for \nueb via the
detection reaction p(\nueb,e+)n. No \nueb signal from LF violating mu+ decays
was identified. We extract upper limits of the branching ratio for the LF
violating decay mu+ -> e+ \nueb \nu compared to the Standard Model (SM) mu+ ->
e+ nue numub decay: BR < 0.9(1.7)x10^{-3} (90%CL) depending on the spectral
distribution of \nueb characterized by the Michel parameter rho=0.75 (0.0).
These results improve earlier limits by one order of magnitude and restrict
extensions of the SM in which \nueb emission from mu+ decay is allowed with
considerable strength. The decay \mupdeb as source for the \nueb signal
observed in the LSND experiment can be excluded.


title: Pulse Shape Discrimination in the IGEX Experiment

abstract:
  The IGEX experiment has been operating enriched germanium detectors in the
Canfranc Underground Laboratory (Spain) in a search for the neutrinoless double
decay of 76Ge. The implementation of Pulse Shape Discrimination techniques to
reduce the radioactive background is described in detail. This analysis has
been applied to a fraction of the IGEX data, leading to a rejection of ~60 % of
their background, in the region of interest (from 2 to 2.5 MeV), down to ~0.09
c/(keV kg y).


title:
Absolute Drell-Yan Dimuon Cross Sections in 800 GeV/c pp and pd
  Collisions

abstract:
  The Fermilab E866/NuSea Collaboration has measured the Drell-Yan dimuon cross
sections in 800 GeV/$c$ $pp$ and $pd$ collisions. This represents the first
measurement of the Drell-Yan cross section in $pp$ collisions over a broad
kinematic region and the most extensive study to date of the Drell-Yan cross
section in $pd$ collisions. The results indicate that recent global parton
distribution fits provide a good description of the light antiquark sea in the
nucleon over the Bjorken-$x$ range $0.03 \lesssim x < 0.15$, but overestimate
the valence quark distributions as $x \to 1$.


title:
Polarized Structure Functions in the Valence Quark and Resonance Regions
  and the GDH Sum

abstract:
  I present in this paper the neutron spin physics program in Hall A at
Jefferson Laboratory using a polarized helium-3 target. The program encompasses
several completed experiments, in which, valuable spin observables (spin
dependent structure functions) were measured in order to learn about how the
nucleon spin arises from the behavior of the constituents. These experiments
also offer a ground for testing our understanding of the strong regime of
quantum chromodynamics (QCD) the theory of strong interactions through the
determination of moments of these structure functions.


title: Physics Potential and Prospects for the CUORICINO and CUORE Experiments

abstract:
  The CUORE experiment projects to construct and operate an array of 1000
cryogenic thermal detectors of TeO2, of a mass of 760 g each, to investigate
rare events physics, in particular, double beta decay and non baryonic particle
dark matter. A first step towards CUORE is CUORICINO, an array of 62
bolometers, currently being installed in the Gran Sasso Laboratory. In this
paper we report the physics potential of both stages of the experiment
regarding neutrinoless double beta decay of 130Te, WIMP searches and solar
axions.


title: Using Wavelets to reject background in Dark Matter experiments

abstract:
  A method based on wavelet techniques has been developed and applied to
background rejection in the data of the IGEX dark matter experiment. The method
is presented and described in some detail to show how it efficiently rejects
events coming from noise and microphonism through a mathematical inspection of
their recorded pulse shape. The result of the application of the method to the
last data of IGEX is presented.


title: Future of B Physics at CDF and DO

abstract:
  In this contribution to the panel discussion on ``The Future of Hadron B
Experiments'' held at the 8th International Conference on B Physics at Hadron
Machines (Beauty 2002) at Santiago de Compostela, Spain, we explore the physics
potential for B physics at CDF and DO in five years and beyond. After a brief
introduction to precision flavour physics, we concentrate our discussion on the
future of CP violation by evaluating the prospects for measuring the CKM angles
beta, gamma and alpha at the Tevatron Collider experiments CDF and DO by the
end of Run II.


title: Observation of B0 to p Lambdabar pi-

abstract:
  We report the first observation of the charmless hyperonic B decay, B0 -> p
Lambdabar pi-, using a 78 fb^-1 data sample recorded on the Upsilon(4S)
resonance with the Belle detector at KEKB. The measured branching fraction is
B(B0 -> p Lambdabar pi-) = (3.97 ^{+1.00}_{-0.80} +- 0.56) * 10^-6. Searches
for B0 -> p Lambdabar K- and p Sigmabar0 pi- yield no significant signals and
we set 90% confidence level upper limits of B(B0 -> p Lambdabar K-) < 8.2 *
10^-7 and B(B0 -> p Sigmabar0 pi-) < 3.8 * 10^-6.


title: Dijet angular distributions in photoproduction of charm at HERA

abstract:
  Dijet angular distributions of photoproduction events in which a $D^{*\pm}$
meson is produced in association with one of two energetic jets have been
measured with the ZEUS detector at HERA, using an integrated luminosity of 120
pb$^{-1}$. Differential cross sections as a function of the angle between the
charm-jet and the proton-beam direction in the dijet rest frame have been
measured for samples enriched in direct or resolved photon events. The results
are compared with predictions from leading-order parton-shower Monte Carlo
models and with next-to-leading-order QCD calculations. The angular
distributions show clear evidence for the existence of charm originating from
the photon.


title:
Measurements of Charmless Hadronic Two-Body B Meson Decays and the Ratio
  cal B(B--> DK)/ cal B(B--> D\pi)

abstract:
  We present final measurements of thirteen charmless hadronic B decay modes
from the CLEO experiment. The decay modes include the ten pipi, Kpi, and KKbar
final states and new limits on dibaryonic final states, ppbar, pLambdabar, and
LambdaLambdabar, as well as a new determination of the ratio BR(B-> DK)/BR(B->
Dpi). The results are based on the full CLEO II and CLEO III data samples
totalling 15.3 fb-1 at the Upsilon(4S), and supercede previously published
results.


title: Bose-Einstein Correlations of pi0 Pairs from Hadronic Z0 Decays

abstract:
  We observed Bose-Einstein correlation in pi0 pairs produced in Z0 decays
using the data sample collected by the OPAL detector at LEP 1 from 1991 to
1995. Using a static Gaussian picture for the pion emitter source, we obtain
the chaoticity parameter lambda = 0.55 +- 0.10 +- 0.10 and the source radius R
= (0.59 +- 0.08 +- 0.05) fm. according to the JETSET and HERWIG Monte Carlo
models, the Bose-Einstein correlations in our data sample largely connect pi0s
originating from the decays of different hadrons. Prompt pions formed at string
break-up of cluster decays only form a small fraction of the sample.


title: Branching Fractions of tau Leptons to Three Charged Hadrons

abstract:
  From electron-positron collision data collected with the CLEO detector
operating at CESR near \sqrt{s}=10.6 GeV, improved measurements of the
branching fractions for tau decays into three explicitly identified hadrons and
a neutrino are presented as {\cal
B}(\tau^-\to\pi^-\pi^+\pi^-\nu_\tau)=(9.13\pm0.05\pm0.46)%, {\cal B}(\tau^-\to
K^-\pi^+\pi^-\nu_\tau)=(3.84\pm0.14\pm0.38)\times10^{-3}, {\cal B}(\tau^-\to
K^-K^+\pi^-\nu_\tau)=(1.55\pm0.06\pm0.09)\times10^{-3}, and {\cal B}(\tau^-\to
K^-K^+K^-\nu_\tau)<3.7\times10^{-5} at 90% C.L., where the uncertainties are
statistical and systematic, respectively.


title: Deuteron Photodisintegration in the Quark-Hadron Picture

abstract:
  The study of the two-body photodisintegration of the deuteron in the few GeV
region is the ideal reaction to clarify the transition from the nucleonic
degrees of freedom to the QCD picture of hadrons. The CLAS large angle
spectrometer of Hall B at Jlab allowed for the first time the complete
measurement of the angular distribution of the differential cross section at
photon energy between 0.5 and 3 GeV. Preliminary results of the E93-017
experiment from the analysis of the 30% of the total statistic accumulated show
persistent forward-backward asymmetry and are well described by the recent
calculation of the deuteron photodisintegration cross section derived in the
framework of the Quark Gluon String Model.


title: Measurements of Rare B Decays at BABAR

abstract:
  We present the results of searches for rare B meson decays. The measurements
use all or part of a data sample of about 88 million $\Upsilon(4S)\to B{\bar
B}$ decays collected between 1999 and 2002 with the \babar detector at the
PEP-II asymmetric energy B Factory at the Stanford Linear Accelerator Center.
We study a variety of decays dominated by electromagnetic, electroweak and
gluonic penguin transitions, and report measurements of branching fractions and
other quantities of interest.


title:
Optimal use of Information for Measuring $M_t$ in Lepton+jets $t\bar{t}$
  Events

abstract:
  We present a novel approach that is being developed at DZero for extracting
information from data through a direct comparison of all measured variables in
an event with a matrix element that describes the entire production process.
The method is exemplified in the extraction of the mass of the top quark in
top-antitop events in the lepton+jets final state. Monte Carlo studies suggest
that an improvement of about a factor of two in statistical uncertainty on the
mass of the top quark can be achieved relative to previously published work for
the same channel. Preliminary results from the re-analysis provide a reduction
in the statistical uncertainty of almost a factor of 1.6, corresponding to an
effective factor of 2.4 increase in the size of the data sample.


title: Physics of the CLAS collaboration: some selected results

abstract:
  The CLAS collaboration in Hall B at the Thomas Jeffeson National Accelerator
Facility (Jefferson Lab) has a broad scientific program. Recent results on the
main topics are presented. These concern the electromagnetic exitation of
nucleon resonances, the measurement of inclusive spin structrure functions in
the nucleon resonance region, the first signature of the Generalized Parton
Distributions through the Deeply Virtual Compton Scattering measurement and the
deuteron photodisintegration and photoproduction of light vector mesons.


title: Measurement of the $\Omega_c^0$ Lifetime

abstract:
  The FOCUS experiment(FNAL-E831) has used two channels, $\Omega^- \pi^+$ and
$\Xi^-K^- \pi^+ \pi^+$,to measure the lifetime of the $\Omega_c^0$ charmed
baryon. From a sample of $64 \pm 14$ signal events at a mass of 2.698
GeV/$c^2$, we measure an $\Omega_c^0$ lifetime of $72 \pm 11$ (stat.) $\pm 11$
(sys.) fs, substantially improving upon the current world average.


title: Measurement of inclusive jet cross sections in photoproduction at HERA

abstract:
  Inclusive jet cross sections are measured in photoproduction at HERA using
the H1 detector. The data sample of e+ p -> e+ + jet + X events in the
kinematic range of photon virtualities Q^2 < 1 GeV^2 and photon-proton
centre-of-mass energies 95 < W_gammap < 285 GeV represents an integrated
luminosity of 24.1 pb^-1. Jets are defined using the inclusive k_T algorithm.
Single- and multi-differential cross sections are measured as functions of jet
transverse energy E_T^jet and pseudorapidity \eta^jet in the domain 5 < E_T^jet
< 75 GeV and -1 < \eta^jet < 2.5. The cross sections are found to be in good
agreement with next-to-leading order perturbative QCD calculations corrected
for fragmentation and underlying event effects. The cross section differential
in E_T^jet, which varies by six orders of magnitude over the measured range, is
compared with similar distributions from p pbar colliders at equal and higher
energies.


title:
Solar Neutrino Physics: historical evolution, present status and
  perspectives

abstract:
  Solar neutrino physics is an exciting and difficult field of research for
physicists, where astrophysics, elementary particle and nuclear physics meet. \
The Sun produces the energy that life has been using on Earth for many years,
about $10^9$ y, emits a lot of particles: protons, electrons, ions,
electromagnetic quanta... among them neutrinos play an important role allowing
to us to check our knowledge on solar characteristics. The main aim of this
paper is to offer a practical overview of various aspects concerning the solar
neutrino physics: after a short historical excursus, the different detection
techniques and present experimental results and problems are analysed.
Moreover, the status of art of solar modeling, possible solutions to the so
called solar neutrino problem (SNP) and planned detectors are reviewed.


title: Beam energy measurement at linear colliders using spin precession

abstract:
  Linear collider designs foresee some bends of about 5-10 mrad. The spin
precession angle of one TeV electrons on 10 mrad bend is 23.2 rad and it
changes proportional to the energy. Measurement of the spin direction using
Compton scattering of laser light on electrons before and after the bend allows
determining the beam energy with an accuracy about of 10^{-5}. In this paper
the principle of the method, the procedure of the measurement and possible
errors are discussed. Some remarks about importance of plasma focusing effects
in the method of beam energy measurement using Moller scattering are given.