title:
Searches for New Physics in Events with a photon and a missing energy at
  CDF Run II

abstract:
  The addition of the EMTiming system installed to provide the time
measurements of the electromagnetic calorimeter signals has significantly
increased the sensitivity of CDF to events with a photon and a missing energy.
Here I review recent searches in this signature performed by CDF using data
from proton-antiproton collisions at the center of mass energy of 1.96 TeV.
They provide new constraints on models with large extra dimensions and with
gauge mediated supersymmetry breaking.


title: The evolution of a pre-heated Intergalactic Medium

abstract:
  We analyse the evolution of the Intergalactic Medium (IGM) by means of an
extended set of large box size hydrodynamical simulations which include
pre-heating. We focus on the properties of the z~2 Lyman-alpha forest and on
the population of clusters and groups of galaxies at z=0. We investigate the
distribution of voids in the Lyman-alpha flux and the entropy-temperature
relation of galaxy groups, comparing the simulation results to recent data from
high-resolution quasar spectra and from X-ray observations. Pre-heating is
included through a simple phenomenological prescription, in which at z=4 the
entropy of all gas particles, whose overdensity exceeds a threshold value
delta_h is increased to a minimum value K_fl. While the entropy level observed
in the central regions of galaxy groups requires a fairly strong pre-heating,
with K_fl>100 keV cm^2, the void statistics of the Lyman-alpha forest impose
that this pre-heating should take place only in relatively high-density
regions, in order not to destroy the cold filaments that give rise to the
forest. We conclude that any injection of non-gravitational energy in the
diffuse baryons should avoid low-density regions at high redshift and/or take
place at relatively low redshift.


title: Clifford Algebras and Graphs

abstract:
  I show how to associate a Clifford algebra to a graph. I describe the
structure of these Clifford graph algebras and provide many examples and
pictures. I describe which graphs correspond to isomorphic Clifford algebras
and also discuss other related sets of graphs. This construction can be used to
build models of representations of simply-laced compact Lie groups.


title: Unitarity and universality with kaon physics at KLOE

abstract:
  All relevant inputs for the extraction of the CKM matrix element \vus from
\kl, \ks and \kpm decays have been measured at KLOE. From a global fit using
only KLOE results, but \ks lifetime, a value of $|\vus|\fzero = 0.2157 \pm
0.0006$ is obtained, where \fzero is the form factor parametrizing the hadronic
matrix element evaluated at zero momentum transfer. Comparison of the values of
\fVus for $K_{e3}$ and $K_{\mu3}$ modes provides a test of lepton universality
at 0.8% level of accuracy. The value $\vus/\vud=0.2323(15)$ has been obtained
from the ratio $\Gamma(K\to\mu \nu)/\Gamma(\pi\to\mu \nu)$ using KLOE
measurement of $\BR(\kpm \to \mudue)$ and lattice calculation of the ratio of
decay constants $f_K/f_{\pi}$. These results, together with $\vud =
0.97418(26)$, are compatible at 0.6$\sigma$ level with CKM matrix unitarity.
The universality of lepton and quark weak couplings can be tested and
constraints on new physics extensions of the Standard Model can be set using
these very precise measurements from kaon decays.


title: Soft Diffraction at the LHC

abstract:
  We present a triple-Regge analysis of the available pp --> p + X high-energy
data accounting for absorptive corrections. We describe a model for high-energy
soft interactions which includes the whole set of multi-Pomeron (n --> m)
vertices, and give predictions for the LHC.


title: ZQCD and universal matching to domain walls

abstract:
  We discuss the one loop matching procedure in ZQCD. Universality and Casimir
scaling leave -in terms of the 't Hooft coupling- just two combinationsof
parameters to be fixed numerically. These numbers are then the same for any
number of colours.


title: Measurement of event shapes and $\alpha_s$ in $e^+e^-$

abstract:
  We report results on measurements of the strong coupling \as from event shape
data at \Petra and \Lep. These include analyses of their distributions
employing the recent NLLO calculations and analyses of their moments using NLO
and power correction predictions.


title: Falling Factorials, Generating Functions, and Conjoint Ranking Tables

abstract:
  We investigate the coefficients generated by expressing the falling factorial
$(xy)_k$ as a linear combination of falling factorial products $(x)_l (y)_m$
for $l,m =1,...,k$. Algebraic and combinatoric properties of these coefficients
are discussed, including recurrence relations, closed-form formulae, relations
with Stirling numbers, and a combinatorial characterization in terms of
conjoint ranking tables.


title: A Simple Introduction to Particle Physics

abstract:
  This is the first of a series of papers in which we present a brief
introduction to the relevant mathematical and physical ideas that form the
foundation of Particle Physics, including Group Theory, Relativistic Quantum
Mechanics, Quantum Field Theory and Interactions, Abelian and Non-Abelian Gauge
Theory, and the SU(3)xSU(2)xU(1) Gauge Theory that describes our universe apart
from gravity. These notes are not intended to be a comprehensive introduction
to any of the ideas contained in them. Among the glaring omissions are CPT
theorems, evaluations of Feynman Diagrams, Renormalization, and Anomalies. The
topics were chosen according to the authors preferences and agenda. These notes
are intended for a student who has completed the standard undergraduate physics
and mathematics courses. Furthermore, these notes should not and will not in
any way take the place of the related courses, but rather provide a primer for
detailed courses in QFT, Gauge Theory, String Theory, etc., which will fill in
the many gaps left by this paper.


title: Axion Stabilization in Type IIB Flux Compactifications

abstract:
  A scenario for stabilization of axionic moduli fields in the context of type
IIB Calabi-Yau flux compactifications is discussed in detail. We consider the
case of a Calabi-Yau orientifold with h^{1,1}_- \neq 0 which allows for the
presence of B_2 and C_2-moduli. In an attempt to generalize the KKLT and the
Large Volume Scenario, we show that these axions can also be stabilized - some
already at tree level, and others when we include perturbative
\alpha'-corrections to the Kaehler potential K and nonperturbative D3-instanton
contributions to the superpotential W. At last, we comment on the possible
influence of worldsheet instantons on the process of moduli stabilization.


title: A Diagrammatic Approach to Scalar Field Correlators during Inflation

abstract:
  We consider a self-interacting scalar field in a de Sitter background and
deal with the associated infrared divergences in a purely diagrammatic way
using the in-in formalism. In the particular case of a large N O(N) invariant
scalar field theory with quartic self-interactions we recover the result that
the connected four-point correlation function, which is a signal of
non-Gaussianity, is non-perturbatively enhanced with respect to its tree-level
value.


title:
The variance of arithmetic measures associated to closed geodesics on
  the modular surface

abstract:
  We determine the variance for the fluctuations of the arithmetic measures
obtained by collecting all closed geodesics on the modular surface with the
same discriminant and ordering them by the latter. This arithmetic variance
differs by subtle factors from the variance that one gets when considering
individual closed geodesics when ordered by their length. The arithmetic
variance is the same one that appears in the fluctuations of measures
associated with quantum states on the modular surface.


title:
A sound spatio-temporal Hoare logic for the verification of structured
  interactive programs with registers and voices

abstract:
  Interactive systems with registers and voices (shortly, "rv-systems") are a
model for interactive computing obtained closing register machines with respect
to a space-time duality transformation ("voices" are the time-dual counterparts
of "registers"). In the same vain, AGAPIA v0.1, a structured programming
language for rv-systems, is the space-time dual closure of classical while
programs (over a specific type of data). Typical AGAPIA programs describe open
processes located at various sites and having their temporal windows of
adequate reaction to the environment. The language naturally supports process
migration, structured interaction, and deployment of components on
heterogeneous machines.
  In this paper a sound Hoare-like spatio-temporal logic for the verification
of AGAPIA v0.1 programs is introduced. As a case study, a formal verification
proof of a popular distributed termination detection protocol is presented.


title:
Accessing tri-gluon correlations in the nucleon via the single spin
  asymmetry in open charm production

abstract:
  We calculate the single transverse-spin asymmetry for open charm production
in $pp$ collisions within the QCD collinear factorization approach. We include
contributions from both twist-three quark-gluon and tri-gluon correlation
functions. We find that the quark-gluon correlation functions alone generate
only a very small asymmetry for open charm production in the kinematic region
of current interest at RHIC, so that the observation of any significant
single-spin asymmetry would be a clear indication of the presence of tri-gluon
correlations inside a polarized proton. We furthermore demonstrate that the
tri-gluon contribution could be very different for the production of $D$ and
$\bar{D}$ mesons. These features make the single spin asymmetry in open charm
production in polarized $pp$ collisions at RHIC an excellent probe of tri-gluon
correlation functions.


title:
On the middle convolution of local systems. With an Appendix by M.
  Dettweiler and S. Reiter

abstract:
  We study the middle convolution of local systems and realize special linear
groups as Galois groups over the rationals. In the Appendix to this paper,
written jointly with Stefan Reiter, we prove the existence of a new motivic
local system with $G_2$-monodromy.


title: Rigid local systems and potential automorphy: The $G_2$-case

abstract:
  We use a certain rigid local system in order to prove the potential
automorphy of certain Galois representations with values in $G_2,$ found by N.
Katz and the author.


title:
The influence of Pauli blocking effects on the properties of dense
  hydrogen

abstract:
  We investigate the effects of Pauli blocking on the properties of hydrogen at
high pressures, where recent experiments have shown a transition from
insulating behavior to metal-like conductivity. Since the Pauli principle
prevents multiple occupation of electron states (Pauli blocking), atomic states
disintegrate subsequently at high densities (Mott effect). We calculate the
energy shifts due to Pauli blocking and discuss the Mott effect solving an
effective Schroedinger equation for strongly correlated systems. The ionization
equilibrium is treated on the basis of a chemical approach. Results for the
ionization equilibrium and the pressure in the region 4.000 K < T < 20.000 K
are presented. We show that the transition to a highly conducting state is
softer than found in earlier work. A first order phase transition is observed
at T < 6.450 K, but a diffuse transition appears still up to 20.000 K.


title: Inflationary Potential from 21 cm Tomography and Planck

abstract:
  Three-dimensional neutral hydrogen mapping using the redshifted 21 cm line
has recently emerged as a promising cosmological probe. Within the framework of
slow-roll reconstruction, we analyze how well the inflationary potential can be
reconstructed by combining data from 21 cm experiments and cosmic microwave
background data from the Planck satellite. We consider inflationary models
classified according to the amplitude of their tensor component, and show that
21 cm measurements can significantly improve constraints on the slow-roll
parameters and determine the shape of the inflationary potential.


title: High mass dijet and ttbar resonance searches

abstract:
  We present searches for dijet and ttbar mass resonances using between 0.68
and 2.1 fb-1 of Tevatron Run II data collected by the CDF and D0 detectors. No
evidence of new physics is found, and 95% C.L. limits are set on a number of
new physics hypotheses, such as excited quark, Randal-Sundrum graviton, Z', W',
color-octet technirho, axigluon and flavor-universal coloron, E6 diquark, quark
compositeness, ADD and TeV-1-sized LED, massive gluon.


title: Higgs searches at the Tevatron

abstract:
  We review the status of the searches for the Higgs boson in the context of
the Standard Model and the Minimal SuperSymmetric Standard Model by the CDF and
DO experiments at the Fermilab Tevatron proton-antiproton collider, using up to
$2.4 \rm{fb}^{-1}$ of Run II data. Since no evidence of signal above the
expected background is observed in any of the various final states examined,
limits at 95% confidence level are presented.


title: Fundamental issues of quantum theory

abstract:
  Since the quantum field theory treats a system of particles, there must be a
distribution which is associated with the system of particles. It means that a
meaningful quantity is adjoined in the system of particles. It seems that these
concepts, constraints and distribution are ignored in the conventional
approach. Further more, there are two versions of quantization relations, one
is prior to the field equation and the other is posterior to the field
equation. And it is very difficult to find the posterior one. If the posterior
one is found, of course, these two versions of quantization must be the same
one. Actually, it implies that there is recursive problem. In this paper, we
will discuss these serious problems.


title: Shadow Fermions, Messenger Scalars and Leptogenesis

abstract:
  A mechanism for leptogenesis at the electroweak scale was investigated in a
model of dark energy and dark matter proposed by one of us (PQH). This model
involves an asymptotically free gauge group SU(2)Z and an axion-like particle
with an SU(2)Z-instanton-induced potential which yields a scenario for the dark
energy. Furthermore, the extended particle content of this SU(2)Z model
contains a possible candidate for the cold dark matter, namely, the SU(2)Z
"shadow" fermion, which couples with the Standard Model lepton through a scalar
"messenger field" carrying both SU(2)Z and electroweak quantum numbers. Since
these shadow fermions are in a real representation of SU(2)Z, lepton number can
be violated in the Yukawa sector and a lepton number asymmetry can be generated
in the SU(2)Z particle's decay which is also CP-violating and
"out-of-equilibrium". The asymmetry coming from the interference between the
tree-level and one-loop amplitudes was calculated for both messenger scalar and
shadow fermion decays. It turns out, in order to have a non-vanishing lepton
asymmetry and to be consistent with the unitarity condition, some shadow
fermions have to decay into lighter messenger scalars, hence could be a
candidate "progenitor" for the lepton asymmetry.


title:
Population rate codes carried by mean, fluctuation and synchrony of
  neuronal firings

abstract:
  A population of firing neurons is expected to carry information not only by
mean firing rate but also by fluctuation and synchrony among neurons. In order
to examine this possibility, we have studied responses of neuronal ensembles to
three kinds of inputs: mean-, fluctuation- and synchrony-driven inputs. The
generalized rate-code model including additive and multiplicative noise (H.
Hasegawa, Phys. Rev. E {\bf 75} (2007) 051904) has been studied by direct
simulations (DSs) and the augmented moment method (AMM) in which equations of
motion for mean firing rate, fluctuation and synchrony are derived. Results
calculated by the AMM are in good agreement with those by DSs. The independent
component analysis (ICA) of our results has shown that mean firing rate,
fluctuation (or variability) and synchrony may carry independent information in
the population rate-code model. The input-output relation of mean firing rates
is shown to have higher sensitivity for larger multiplicative noise, as
recently observed in prefrontal cortex. A comparison is made between results
obtained by the integrate-and-fire (IF) model and our rate-code model.


title: The rate of convergence of the Walk on Spheres Algorithm

abstract:
  In this paper we examine the rate of convergence of one of the standard
algorithms for emulating exit probabilities of Brownian motion, the Walk on
Spheres (WoS) algorithm. We obtain the complete characterization of the rate of
convergence of WoS in terms of the local geomnetry of a domain.


title:
Integrable Inhomogeneous Spin Chains in Generalized Lunin-Maldacena
  Backgrounds

abstract:
  We obtain through a Matrix Product Ansatz the exact solution of the most
general inhomogeneous spin chain with nearest neighbor interaction and with
$U(1)^2$ and $U(1)^3$ symmetries. These models are related to the one loop
mixing matrix of the Leigh-Strassler deformed N=4 SYM theory, dual to type IIB
string theory in the generalized Lunin-Maldacena backgrounds, in the sectors of
two and three kinds of fields, respectively. The solutions presented here
generalizes the results obtained by the author in a previous work for
homogeneous spins chains with $U(1)^N$ symmetries in the sectors of N=2 and
N=3.


title: Enhancements to A Lightweight RFID Authentication Protocol

abstract:
  Vajda and Buttyan (VB) proposed a set of five lightweight RFID authentication
protocols. Defend, Fu, and Juels (DFJ) did cryptanalysis on two of them - XOR
and SUBSET. To the XOR protocol, DFJ proposed repeated keys attack and nibble
attack. In this paper, we identify the vulnerability existed in the original
VB's successive session key permutation algorithm. We propose three
enhancements to prevent DFJ's attacks and make XOR protocol stronger without
introducing extra resource cost.


title: Reality of Moving Groups in the Galaxy

abstract:
  The existence of old dispersed stellar groups within the Milky Way disk is
still controversial. Are they the debris of ancient star-forming aggregates, or
short-lived artifacts of dynamical origin? With detailed elemental abundance
measurements from high quality spectroscopic data, we show that at least one
such old dispersed stellar group is a true relic of an earlier phase of star
formation. The identification of other such relic structures will provide
essential information for probing the evolutionary history of the Milky Way
disk.


title: Modeling the Disk (three-phase) Interstellar Medium

abstract:
  The evolution of galactic disks from their early stages is dominated by
gasdynamical effects such as gas infall, galactic fountains, and galactic
outflows, and further more. The influence of these processes is only
understandable in the framework of diverse gas phases differing in their
thermal energies, dynamics, and element abundances. To trace the temporal and
chemical evolution of galactic disks, it is therefore essential to model the
interstellar gasdynamics combined with stellar dynamics, the interactions
between gas phases, and star-gas mass and energy exchanges as detailed as
possible. This article reviews the potential of state-of-the-art numerical
schemes like Smooth-Particle and grid-based hydrodynamics as well as the
inherent processes as of star-formation criteria and feedback, energy deposit
and metal enrichment by stars and on the influence of gas-phase interactions on
the galactic gas dynamics and chemistry.


title: The CDF L2 XFT Trigger Upgrade

abstract:
  We briefly present the eXtremely Fast Tracker stereo track upgrade for the
CDF Level 2 trigger system. This upgrade enabled full 3D track reconstruction
at Level 2 of the 3-Level CDF online triggering system. Using information
provided by the stereo layers of the Central Outer Tracker, we can decrease the
trigger rate due to fake tracks by requiring the tracks to be consistent with a
single vertex in all three dimensions but also by using the track information
to "point" to the various detector components. We will also discuss the
effectiveness of the Level 2 stereo track algorithm at achieving reduced
trigger rates with high efficiencies during high luminosity running.


title:
Search for Heavy Top-like Quarks tprime->Wq Using Lepton Plus Jets
  Events in 1.96 TeV p-pbar Collisions

abstract:
  We present the results of a search for a new heavy top-like quark, tprime,
decaying to a W boson and another quark using the CDF II Detector in Run II of
the Tevatron ppbar collider. New top-like quarks are predicted in a number of
models of new physics. Using a data sample corresponding to 2.8 fb-1 of
integrated luminosity we fit the observed spectrum of total transverse energy
and reconstructed quark mass to a combination of background plus signal. We see
no evidence for tprime production, so use this result to set limits on the
tprime tprimebar production cross section times the branching ratio of tprime
to Wq and infer a lower limit of 311 GeV/c2 on the mass of the tprime at 95%
CL.


title:
Top Quark Pair Production Cross Section and Forward-Backward Asymmetry
  at the Tevatron

abstract:
  We present recent results on top quark pair production cross section and
forward-backward asymmetry at the Tevatron. Three new cross section
measurements from CDF and one new measurement from DO are presented that
utilize the full dataset available. A new DO top cross section combination
gives a ttbar production cross section of sigma_ttbar = 7.83 + 0.46-0.45 (stat)
+ 0.64-0.53 (syst) +-0.48 (lumi). The new CDF cross section combination for
ttbar production is found to be 7.0 +- 0.3 (stat) +- 0.4 (syst) +- 0.4 (lumi)
pb giving a total uncertainty of 9%, very close to the that of the current best
theoretical predictions. It is important to measure the top cross section in as
many different channels as possible and investigate their compatibility. This
is useful as new physics might show up differently in the different channels.
Thus any significant discrepancy could be a sign of new physics. Three new
measurements of the forward-backward asymmetry are also presented. The two CDF
measurements unfold the observed asymmetry back to parton level in order to
directly compare the values obtained with theoretical predictions. The DO
measurement is not unfolded and therefore does not depend on the specific
method used for unfolding.


title: Differential Geometry of Curves and Surfaces in Lorentz-Minkowski space

abstract:
  We review part of the classical theory of curves and surfaces in
$3$-dimensional Lorentz-Minkowski space. We focus in spacelike surfaces with
constant mean curvature pointing the differences and similarities with the
Euclidean space.


title: Backward Ricci Flow on Locally Homogeneous Three-manifolds

abstract:
  In this paper, we study the backward Ricci flow on locally homogeneous
3-manifolds. We describe the long time behavior and show that, typically and
after a proper re-scaling, there is convergence to a sub-Riemannian geometry. A
similar behavior was observed by the authors in the case of the cross curvature
flow.


title: Translation Covers Among Triangular Billiard Surfaces

abstract:
  We identify all translation covers among triangular billiard surfaces. Our
main tools are the holonomy field of Kenyon and Smillie and a geometric
property of translation surfaces, which we call the fingerprint of a point,
that is preserved under balanced translation covers.


title: Selmer varieties for curves with CM Jacobians

abstract:
  We study the Selmer variety associated to a canonical quotient of the
$\Q_p$-pro-unipotent fundamental group of a smooth projective curve of genus at
least two defined over $\Q$ whose Jacobian decomposes into a product of abelian
varieties with complex multiplication. Elementary multi-variable Iwasawa theory
is used to prove dimension bounds, which, in turn, lead to a new proof of
Diophantine finiteness over $\Q$ for such curves.


title:
A Selberg Integral Type Formula for an sl_2 One-Dimensional Space of
  Conformal Blocks

abstract:
  For distinct complex numbers $z_1,...,z_{2N}$, we give a polynomial
$P(y_1,...,y_{2N})$ in the variables $y_1,...,y_{2N}$, which is homogeneous of
degree $N$, linear with respect to each variable, $sl_2$-invariant with respect
to a natural $sl_2$-action, and is of order $N-1$ at
$(y_1,...,y_{2N})=(z_1,...,z_{2N})$.
  We give also a Selberg integral type formula for the associated
one-dimensional space of conformal blocks.


title: The Fundamental Problem with the Building Block Hypothesis

abstract:
  Skepticism of the building block hypothesis (BBH) has previously been
expressed on account of the weak theoretical foundations of this hypothesis and
the anomalies in the empirical record of the simple genetic algorithm. In this
paper we hone in on a more fundamental cause for skepticism--the extraordinary
strength of some of the assumptions that undergird the BBH. Specifically, we
focus on assumptions made about the distribution of fitness over the genome
set, and argue that these assumptions are unacceptably strong. As most of these
assumptions have been embraced by the designers of so-called "competent"
genetic algorithms, our critique is relevant to an appraisal of such algorithms
as well.


title:
Two Remarkable Computational Competencies of the Simple Genetic
  Algorithm

abstract:
  Since the inception of genetic algorithmics the identification of
computational efficiencies of the simple genetic algorithm (SGA) has been an
important goal. In this paper we distinguish between a computational competency
of the SGA--an efficient, but narrow computational ability--and a computational
proficiency of the SGA--a computational ability that is both efficient and
broad. Till date, attempts to deduce a computational proficiency of the SGA
have been unsuccessful. It may, however, be possible to inductively infer a
computational proficiency of the SGA from a set of related computational
competencies that have been deduced. With this in mind we deduce two
computational competencies of the SGA. These competencies, when considered
together, point toward a remarkable computational proficiency of the SGA. This
proficiency is pertinent to a general problem that is closely related to a
well-known statistical problem at the cutting edge of computational genetics.


title: Measurements of CKM angle $\phi_3$ at BELLE

abstract:
  We report recent results on $\phi_3$ measurement at the Belle collaboration.
The analyses reported here are based on a large data sample that contains 657
million $B\bar{B}$ pairs collected with the Belle detector at the KEKB
asymmetric-energy $e^+ e^-$ collider at the $\Upsilon(4S)$ resonance.


title: Alignments of Group Galaxies with Neighboring Groups

abstract:
  Using a sample of galaxy groups found in the Sloan Digital
  Sky Survey Data Release 4, we measure the following four types of alignment
signals: (1) the alignment between the distributions of the satellites of each
group relative to the direction of the nearest neighbor group (NNG); (2) the
alignment between the major axis direction of the central galaxy of the host
group (HG) and the direction of the NNG; (3) the alignment between the major
axes of the central galaxies of the HG and the NNG; and (4) the alignment
between the major axes of the satellites of the HG and the direction of the
NNG. We find strong signal of alignment between the satellite distribution and
the orientation of central galaxy relative to the direction of the NNG, even
when the NNG is located beyond $3r_{\rm vir}$ of the host group. The major axis
of the central galaxy of the HG is aligned with the direction of the NNG. The
alignment signals are more prominent for groups that are more massive and with
early type central galaxies. We also find that there is a preference for the
two major axis of the central galaxies of the HG and NNG to be parallel for the
system with both early central galaxies, however not for the systems with both
late type central galaxies. For the orientation of satellite galaxies, we do
not find any significant alignment signals relative to the direction of the
NNG. From these four types of alignment measurements, we conclude that the
large scale environment traced by the nearby group affects primarily the shape
of the host dark matter halo, and hence also affects the distribution of
satellite galaxies and the orientation of central galaxies. (Shortened version)


title: Lifting to cluster-tilting objects in higher cluster categories

abstract:
  In this note, we consider the $d$-cluster-tilted algebras, the endomorphism
algebras of $d$-cluster-tilting objects in $d$-cluster categories. We show that
a tilting module over such an algebra lifts to a $d$-cluster-tilting object in
this $d$-cluster category.


title: Top Quark Properties from Top Pair Events and Decays

abstract:
  Over a decade since the discovery of the top quark we are still trying to
unravel mysteries of the heaviest observed particle and learn more about its
nature. The continuously accumulating statistics of CDF and Dzero data provide
the means for measuring top quark properties with ever greater precision and
the opportunity to search for signs of new physics that could be manifested
through subtle deviations from the standard model in the production and decays
of top quarks. In the following we present a slice of the rich program in top
quark physics at the Fermilab Tevatron: measurements of the properties of top
quark decays and searches for unusual phenomena in events with pair produced
tops. In particular, we discuss the most recent and precise CDF and Dzero
measurements of the transverse polarization of W bosons from top decays,
branching ratios and searches for flavor-changing neutral current decays,
decays into charged Higgs and invisible decays. These analyses correspond to
integrated luminosities ranging from 0.9 to 2.7 inv. fb.


title: Search for Leptoquarks, Excited Leptons and Technicolor at the LHC

abstract:
  The ATLAS and CMS experiments at the Large Hadron Collider (LHC) will soon
search for physics phenomena that are not predicted by the Standard Model.
Technicolor, Compositeness and GUT-based models are rich in high-pt leptons and
could be studied in such final states. This contribution shows studies that
indicate that a 5sigma discovery of a 500 GeV leptoquark could occur with 100
pb^-1 of integrated luminosity, Technicolor predicted particles could be seen
with 4 fb^-1 of integrated luminosity and, excited electron could be detected
with 300 fb^-1 of integrated luminosity.


title:
Low-lying non-normal parity states in 8B measured by proton elastic
  scattering on 7Be

abstract:
  A new measurement of proton resonance scattering on 7Be was performed up to
the center-of-mass energy of 6.7 MeV using the low-energy RI beam facility CRIB
(CNS Radioactive Ion Beam separator) at the Center for Nuclear Study of the
University of Tokyo. The excitation function of 7Be+p elastic scattering above
3.5 MeV was measured successfully for the first time, providing important
information about the resonance structure of the 8B nucleus. The resonances are
related to the reaction rate of 7Be(p, gamma)8B, which is the key reaction in
solar 8B neutrino production. Evidence for the presence of two negative parity
states is presented. One of them is a 2- state observed as a broad s-wave
resonance, the existence of which had been questionable. Its possible effects
on the determination of the astrophysical S-factor of 7Be(p, gamma)8B at solar
energy are discussed. The other state had not been observed in previous
measurements, and its spin and parity were determined as 1-.


title:
Properties of predictive formulation of the Nambu-Jona-Lasinio model and
  ghost problem

abstract:
  Recently proposed by Battistel et al. "predictive formulation of the NJL
model" is discussed and its connection with the differential regularization is
noted. The principal problem of this formulation is a non-physical singularity
(Landau pole) in meson propagators. A modification of the formulation, which is
free of the Landau pole and conserves main features of the approach, is
proposed.


title: Central extensions of the Heisenberg algebra

abstract:
  We study the non-trivial central extensions $CEHeis$ of the Heisenberg
algebra $Heis$ recently constructed in {AccBouCE}. We prove that a real form of
$CEHeis$ is one the fifteen classified real four--dimensional solvable Lie
algebras. We also show that $CEHeis$ can be realized (i) as a sub--Lie--algebra
of the Schroedinger algebra and (ii) in terms of two independent copies of the
canonical commutation relations (CCR). This gives a natural family of unitary
representations of $CEHeis$ and allows an explicit determination of the
associated group by exponentiation. In contrast with $Heis$, the group law for
$CEHeis$ is given by nonlinear (quadratic) functions of the coordinates.


title: Squares in (2^2-1)...(n^2-1) and p-adic valuation

abstract:
  In this paper, we determine all the squares in the sequence
$\{\prod_{k=2}^n(k^2-1)\}_{n=2}^\infty $. From this, one deduces that there are
infinitely many squares in this sequence. We also give a formula for the
$p$-adic valuation of the terms in this sequence.


title:
Finite time blow-up for radially symmetric solutions to a critical
  quasilinear Smoluchowski-Poisson system

abstract:
  Finite time blow-up is shown to occur for radially symmetric solutions to a
critical quasilinear Smoluchowski-Poisson system provided that the mass of the
initial condition exceeds an explicit threshold. In the supercritical case,
blow-up is shown to take place for any positive mass. The proof relies on a
novel identity of virial type.


title:
Mutual transformation among bound, virtual and resonance states in
  one-dimensional rectangular potentials

abstract:
  A detailed analysis has been made by R.Zavin and N.Moiseyev(2004 J. Phys. A:
Math, Gen, \textbf{37} 4619) for the change of bound states into resonance
states via coalescence of virtual states in a one-dimensional symmetric
rectangular attractive potential as it becomes shallow, with convergent wave
functions of virtual and resonance states by the complex scaling method. As a
complement to such an analysis, we discuss some global features of the pole
spectrum of the S-matrix by using a complex extension of the real potential
$V^{(\mathrm{real})}$ to $e^{i\alpha}V^{(\mathrm{real})}$ with a real phase
$\alpha$. We show the structures of trajectories of poles developed for the
change of $\alpha$ in the complex momentum plane, which is useful to understand
the mutual transformation among the bound, virtual and resonance states.


title:
Finite time blow-up for a one-dimensional quasilinear
  parabolic-parabolic chemotaxis system

abstract:
  Finite time blow-up is shown to occur for solutions to a one-dimensional
quasilinear parabolic-parabolic chemotaxis system as soon as the mean value of
the initial condition exceeds some threshold value. The proof combines a novel
identity of virial type with the boundedness from below of the Liapunov
functional associated to the system, the latter being peculiar to the
one-dimensional setting.


title:
Is it possible for a superluminal signal velocity without violating
  causality?

abstract:
  We present a model for a vacuum-like effective medium composed of the
absorbing and gain media under the special designed parameters. Within the
linear response theory, we prove that any pulse signal (with or without a
discontinuity) through such a kind of vacuum-like effective media is always
equal to the light speed in vacuum () without any distortion. As well known
that the group velocity in anomalous or normal dispersive media may be smaller
or larger than, or even become negative, but the discontinuous point always
propagates at the velocity . Therefore we present some discussions on different
definitions of the signals, based on the light pulses with a well-defined shape
or with a sudden change, for trying to understand two possibilities for the
signal velocity without violating the causality.


title: Mean Curvature Flow and Bernstein-Calabi Results for Spacelike Graphs

abstract:
  This is a survey of our work on spacelike graphic submanifolds in
pseudo-Riemannian products, namely on Heinz-Chern and Bernstein-Calabi results
and on the mean curvature flow, with applications to the homotopy of maps
between Riemannian manifolds.


title:
Conditions for Vanishing Central-well Population in Triple-well
  Adiabatic Transport

abstract:
  Analytical expressions are derived for coherent tunneling via adiabatic
passage (CTAP) in a triple well system with negligible central-well population
at all times during the transfer. It is shown that a manipulation of the depths
of the extreme-wells, correlated with the time variation of the
\emph{non-adjacent} barriers is essential for maintaining vanishing population
of the central well. The validity of our conditions are demonstrated with a
numerical solution of the time-dependent Schr\"{o}dinger equation. The transfer
process is interpreted in terms of a current through the central well.


title: Model with Strong $\gamma_4$ $T$-violation

abstract:
  We extend the $T$ violating model of the paper on "Hidden symmetry of the CKM
and neutrino-mapping matrices" by assuming its $T$-violating phases
$\chi_\uparrow$ and $\chi_\downarrow$ to be large and the same, with
$\chi=\chi_\uparrow=\chi_\downarrow$. In this case, the model has 9 real
parameters: $\alpha_\uparrow, \beta_\uparrow, \xi_\uparrow, \eta_\uparrow$ for
the $\uparrow$-quark sector, $\alpha_\downarrow, \beta_\downarrow,
\xi_\downarrow, \eta_\downarrow$ for the $\downarrow$ sector and a common
$\chi$. We examine whether these nine parameters are compatible with ten
observables: the six quark masses and the four real parameters that
characterize the CKM matrix (i.e., the Jarlskog invariant ${\cal J}$ and three
Eulerian angles). We find that this is possible only if the $T$violating phase
$\chi$ is large, between $-120^0$ to $-135^0$. In this strong $T$ violating
model, the smallness of the Jarlskog invariant ${\cal J}\cong 3\times 10^{-5}$
is mainly accounted for by the large heavy quark masses, with $\frac{m_c}{m_t}
<\frac{m_s}{m_b} \approx .02$, as well as the near complete overlap of $t$ and
$b$ quark, with $(c|b)=-.04$.


title:
On correspondence between solutions of a family of cubic Thue equations
  and isomorphism classes of the simplest cubic fields

abstract:
  Let $m\geq -1$ be an integer. We give a correspondence between integer
solutions to the parametric family of cubic Thue equations \[
X^3-mX^2Y-(m+3)XY^2-Y^3=\lambda \] where $\lambda>0$ is a divisor of $m^2+3m+9$
and isomorphism classes of the simplest cubic fields. By the correspondence and
R. Okazaki's result, we determine the exactly 66 non-trivial solutions to the
Thue equations for positive divisors $\lambda$ of $m^2+3m+9$. As a consequence,
we obtain another proof of Okazaki's theorem which asserts that the simplest
cubic fields are non-isomorphic to each other except for
$m=-1,0,1,2,3,5,12,54,66,1259,2389$.


title: Equilibria in the Troposphere

abstract:
  We show that various types of equilibrium play an important part in the
behaviour of the troposphere. In analogy to the electro-chemical potential
(well-known in solid-state physics and electro-chemistry) a gravito-chemical
potential and a gravito-thermo-chemical potential, as well as the corresponding
equilibria are introduced. We shall show that (a) the isothermal atmosphere is
characterized by a constant gravito-chemical potential; (b) the well-mixed or
adiabatic atmosphere is characterized by a constant gravito-thermo-chemical
potential. Thus, a linear decrease of the temperature with the vertical
coordinate corresponds to a state of equilibrium.


title: Long-term multi-frequency monitoring of microquasars

abstract:
  We discuss the results of the radio studies of the X-ray binaries with
relativistic jets. We carried out a multi-frequency (1-30 GHz) daily monitoring
of the radio flux variability of the microquasars SS433, GRS1915+105, and Cyg
X-3 with the RATAN-600 radio telescope during the recent sets from 1 November
2006 to 31 August 2008. From December 2005 radio emission of Cyg X-3 after four
years relatively quiescent levels (100-200 mJy) dropped down to $\sim$20 mJy,
and then we detected a lot of bright radio flaring events (1-20 Jy) followed
the very variable (from 0 to 0.5 crabs) 15-50 keV X-ray emission, which was
monitored in the Swift/BAT ASM program. Again from December 2007 to March 2008
we have daily measured almost quiescent fluxes from Cyg X-3 but in April 2008 a
bright radio flare with clear synchrotron self-absorption was detected. We
detected several bright short-term flares from GRS 1915+105 which could be
associated with active soft X-ray events. In intense measurements of SS433
fluxes (often mutually with X-ray and optical observations) we detected massive
ejections during powerful flares. We discuss the various spectral and temporal
characteristics of the light curves from the microquasars. Monitoring of the
flaring radio emission is a good tracer of jet activity X-ray binaries.


title:
Electronic Structure of New AFFeAs Prototype of Iron Arsenide
  Superconductors

abstract:
  This work is provoked by recent discovery of new class prototype systems
AFFeAs (A=Sr,Ca) of novel layered ironpnictide High-Tc superconductors
(Tc=36K). Here we report ab initio LDA results for electronic structure of the
AFFeAs systems. We provide detailed comparison between electronic properties of
both new systems and reference LaOFeAs (La111) compound. In the vicinity of the
Fermi level all three systems have essentially the same band dispersions.
However for iron fluoride systems F(2p) states were found to be separated in
energy from As(4p) ones in contrast to La111, where O(2p) states strongly
overlaps with As(4p). Thus it should be more plausible to include only Fe(3d)
and As(4p) orbitals into a realistic noninteracting model than for La111.
Moreover Sr substitution with smaller ionic radius Ca in AFFeAs materials leads
to a lattice contruction and stronger Fe(3d)-As(4p) hybridization resulting in
smaller value of the density of states at the Fermi level in the case of Ca
compound. So to some extend Ca system reminds RE111 with later Rare Earths.
However Fermi surface of new fluorides is found to be nearly perfect
two-dimensional. Also we do not expect strong dependence of superconducting
properties with respect to different types of A substitutes.


title: High Energy Sources Monitored with OMC

abstract:
  The Optical Monitoring Camera on-board INTEGRAL (OMC) provides Johnson V band
photometry of any potentially variable source within its field of view. Taking
advantage of the INTEGRAL capabilities allowing the simultaneous observation of
different kind of objects in the optical, X and gamma rays bands, we have
performed a study of the optical counterparts of different high-energy sources.
Up to now, OMC has detected the optical counterpart for more than 100 sources
from the High Energy Catalog (Ebisawa et al., 2003). The photometrically
calibrated light curves produced by OMC can be accessed through our web portal
at: http://sdc.laeff.inta.es/omc


title:
Making vortices in dipolar spinor condensates via rapid adiabatic
  passage

abstract:
  We propose to the create vortices in spin-1 condensates via magnetic
dipole-dipole interaction. Starting with a polarized condensate prepared under
large axial magnetic field, we show that by gradually inverting the field,
population transfer among different spin states can be realized in a controlled
manner. Under optimal condition, we generate a doubly quantized vortex state
containing nearly all atoms in the condensate. The resulting vortex state is a
direct manifestation of the dipole-dipole interaction and spin textures in
spinor condensates. We also point out that the whole process can be
qualitatively described by a simple rapid adiabatic passage model.


title:
Group theoretical study of LOCC-detection of maximally entangled state
  using hypothesis testing

abstract:
  In the asymptotic setting, the optimal test for hypotheses testing of the
maximally entangled state is derived under several locality conditions for
measurements. The optimal test is obtained in several cases with the asymptotic
framework as well as the finite-sample framework. In addition, the experimental
scheme for the optimal test is presented.


title:
Discrete realization of group symmetric LOCC-detection of maximally
  entangled state

abstract:
  Group symmetric LOCC measurement for detecting maximally entangled state is
considered. Usually, this type measurement has continuous-valued outcomes.
However, any realizable measurement has finite-valued outcomes. This paper
proposes discrete realizations of such a group symmetric LOCC measurement.


title:
An approach to construct wave packets with complete classical-quantum
  correspondence in non-relativistic quantum mechanics

abstract:
  We introduce a method to construct wave packets with complete classical and
quantum correspondence in one-dimensional non-relativistic quantum mechanics.
First, we consider two similar oscillators with equal total energy. In
classical domain, we can easily solve this model and obtain the trajectories in
the space of variables. This picture in the quantum level is equivalent with a
hyperbolic partial differential equation which gives us a freedom for choosing
the initial wave function and its initial slope. By taking advantage of this
freedom, we propose a method to choose an appropriate initial condition which
is independent from the form of the oscillators. We then construct the wave
packets for some cases and show that these wave packets closely follow the
whole classical trajectories and peak on them. Moreover, we use de-Broglie Bohm
interpretation of quantum mechanics to quantify this correspondence and show
that the resulting Bohmian trajectories are also in a complete agreement with
their classical counterparts.


title:
Comparison of imaging with sub-wavelength resolution in the canalization
  and resonant tunnelling regimes

abstract:
  We compare the properties of subwavelength imaging in the visible wavelength
range for metal-dielectric multilayers operating in the canalization and the
resonant tunnelling regimes. The analysis is based on the transfer matrix
method and time domain simulations. We show that Point Spread Functions for the
first two resonances in the canalization regime are approximately Gaussian in
shape. Material losses suppress transmission for higher resonances, regularise
the PSF but do not compromise the resolution. In the resonant tunnelling
regime, the MTF may dramatically vary in their phase dependence. Resulting PSF
may have a sub-wavelength thickness as well as may be broad with multiple
maxima and a rapid phase modulation. We show that the width of PSF may be
reduced by further propagation in free space, and we provide arguments to
explain this surprising observation.


title:
Giant Chromospheric Anemone Jet Observed with Hinode and Comparison with
  Magnetohydrodynamic Simulations: Evidence of Propagating Alfven Waves and
  Magnetic Reconnection

abstract:
  Hinode discovered a beautiful giant jet with both cool and hot components at
the solar limb on 2007 February 9. Simultaneous observations by the Hinode SOT,
XRT, and TRACE 195 satellites revealed that hot (5x10^6 K) and cool (10^4 K)
jets were located side by side and that the hot jet preceded the associated
cool jet (1-2 minutes). A current-sheet-like structure was seen in optical (Ca
IIH), EUV (195A), and soft X-ray emissions, suggesting that magnetic
reconnection is occurring in the transition region or upper chromosphere.
Alfven waves were also observed with Hinode SOT. These propagated along the jet
at velocities of 200 km/s with amplitudes (transverse velocity) of 5-15 km/s
and a period of 200 s. We performed two-dimensional MHD simulation of the jets
on the basis of the emerging flux-reconnection model, by extending Yokoyama and
Shibata's model. We extended the model with a more realistic initial condition
(10^6 K corona) and compared our model with multiwavelength observations. The
improvement of the coronal temperature and density in the simulation model
allowed for the first time the reproduction of the structure and evolution of
both the cool and hot jets quantitatively, supporting the magnetic reconnection
model. The generation and the propagation of Alfven waves are also reproduced
self-consistently in the simulation model.


title: Formation of atomic nanoclusters on graphene sheets

abstract:
  The formation of atomic nanoclusters on suspended graphene sheets have been
investigated by employing a Molecular dynamics simulation at finite
temperature. Our systematic study is based on temperature dependent Molecular
dynamics simulations of some transition and alkali atoms on suspended graphene
sheets. We find that the transition atoms aggregate and make various size
nanoclusters distributed randomly on graphene surface. We also report that most
alkali atoms make one atomic layer on graphene sheets. Interestingly, the
potassium atoms almost deposit regularly on the surface at low temperature. We
expect from this behavior that the electrical conductivity of a suspended
graphene doped by potassium atoms would be much higher than the case doped by
the other atoms at low temperature.


title: Spin accumulation with spin-orbit interaction

abstract:
  Spin accumulation is a crucial but imprecise concept in spintronics. In
metal-based spintronics it is characterized in terms of semiclassical
distribution functions. In semiconductors with a strong spin-orbit coupling the
spin accumulation is interpreted as a superposition of coherent eigenstates.
Both views can be reconciled by taking into account the electron-electron
interaction: a sufficiently strong self-consistent exchange field reduces a
spin accumulation to a chemical potential difference between the two spin bands
even in the presence of spin-orbit coupling. We demonstrate the idea on a clean
two-dimensional electron gas (2DEG) by showing how the exchange field protects
a spin accumulation from dephasing and introduces an easy-plane anisotropy.


title:
Spin-triplet f-wave pairing due to three-site cyclic-exchange
  ferromagnetic interactions

abstract:
  Ferromagnetiam and superconductivity in a two-dimensional triangular-lattice
Hubbard model are studied using the density-matrix renormalization group
method. We propose a mechanism of the {\it f}-wave spin-triplet pairing derived
from the three-site cyclic-exchange ferromagnetic interactions. We point out
that a triangular network of hopping integrals, which is required for the
three-site cyclic hopping processes, is contained in the (possibly)
spin-triplet superconducting systems, such as Bechgaard salts (TMTSF)$_2$X,
cobalt oxide Na$_{0.35}$CoO$_2$$\cdot$1.3H$_2$O, and layered perovskite
Sr$_2$RuO$_4$.


title: Labeled Partitions with Colored Permutations

abstract:
  In this paper, we extend the notion of labeled partitions with ordinary
permutations to colored permutations in the sense that the colors are endowed
with a cyclic structure. We use labeled partitions with colored permutations to
derive the generating function of the $\mathrm{fmaj}_k$ indices of colored
permutations. The second result is a combinatorial treatment of a relation on
the q-derangement numbers with respect to colored permutations which leads to
the formula of Chow for signed permutations and the formula of Faliharimalala
and Zeng [10] on colored permutations. The third result is an involution on
permutations that implies the generating function formula for the signed
q-counting of the major indices due to Gessel and Simon. This involution can be
extended to signed permutations. In this way, we obtain a combinatorial
interpretation of a formula of Adin, Gessel and Roichman.


title: Magnetic anisotropy of single 3d spins on CuN surface

abstract:
  First-principles calculations of the magnetic anisotropy energy for Mn- and
Fe-atoms on CuN/Cu(001) surface are performed making use of the torque method.
The easy magnetization direction is found to be different for Mn and Fe atoms
in accord with the experiment. It is shown the magnetic anisotropy has a
single-ion character and mainly originates from the local magnetic moment of
Mn- and Fe-atoms. The uniaxial magnetic anisotropy constants are calculated in
reasonable agreement with the experiment.


title:
Stellar matter with a strong magnetic field within density-dependent
  relativistic models

abstract:
  The effect of strong magnetic fields on the equation of state (EoS) for
compact stars described with density-dependent relativistic hadronic models is
studied. A comparison with other mean-field relativistic models is done. It is
shown that the largest differences between models occur for low densities, and
that the magnetic field affects the crust properties of a star, namely its
extension.


title: Reflective Scattering and Unitarity

abstract:
  Interpretation of unitarity saturation as reflective scattering is discussed.
Analogies with optics and Berry phase alongside with the experimental
consequences of the proposed interpretation at the LHC energies are considered.


title: Angle-deformations in Coxeter groups

abstract:
  The isomorphism problem for Coxeter groups has been reduced to its
'reflection preserving version' by B. Howlett and the second author. Thus, in
order to solve it, it suffices to determine for a given Coxeter system (W,R)
all Coxeter generating sets S of W which are contained in R^W, the set of
reflections of (W,R). In this paper, we provide a further reduction: it
suffices to determine all Coxeter generating sets S in R^W which are
sharp-angled with respect to R.


title:
First performances of the GOLF-NG instrumental prototype observing the
  Sun in Tenerife

abstract:
  The primary challenge of GOLF-NG (Global Oscillations at Low Frequency New
Generation) is the detection of the low-frequency solar gravity and acoustic
modes, as well as the possibility to measure the high-frequency chromospheric
modes. On June 8th 2008, the first sunlight observations with the multichannel
resonant GOLF-NG prototype spectrometer were obtained at the Observatorio del
Teide (Tenerife). The instrument performs integrated (Sun-as-a-star), Doppler
velocity measurements, simultaneously at eight different heights in the D1
sodium line profile, corresponding to photospheric and chromospheric layers of
the solar atmosphere. In order to study its performances, to validate the
conceived strategy, and to estimate the necessary improvements, this prototype
has been running on a daily basis over the whole summer of 2008 at the
Observatorio del Teide. We present here the results of the first GOLF-NG
observations, clearly showing the characteristics of the 5-minute oscillatory
signal at different heights in the solar atmosphere. We compare these signals
with simultaneous observations from GOLF/SOHO and from the Mark-I instrument --
a node of the BiSON network, operating at the same site.


title: Rashba coupling in quantum dots in the presence of magnetic field

abstract:
  We present an analytical solution to the Schr\"odinger equation for electron
in a two-dimensional circular quantum dot in the presence of both external
magnetic field and the Rashba spin-orbit interaction. The confinement is
described by the realistic potential well of finite depth.


title:
Spinodal instabilities and the distillation effect in nuclear matter
  under strong magnetic fields

abstract:
  We study the effect of strong magnetic fields, of the order of
$10^{18}$-$10^{19}$ G, on the instability region of nuclear matter at
subsaturation densities. Relativistic nuclear models both with constant
couplings and with density dependent parameters are considered. It is shown
that a strong magnetic field can have large effects on the instability regions
giving rise to bands of instability and wider unstable regions. As a
consequence we predict larger transition densities at the inner edge of the
crust of compact stars with strong magnetic field. The direction of instability
gives rise to a very strong distillation effect if the last Landau level is
only partially filled. However, for almost completed Landau levels an
anti-distillation effect may occur.


title: Source of CP Violation for the Baryon Asymmetry of the Universe

abstract:
  How to account for the matter predominance of our Universe is a fundamental
issue at the core of our existence. One condition is CP violation, but the
Standard Model falls short by more than $10^{-10}$. Taking cue from a recent
result from the $B$ factories, we find that a fourth quark generation can
provide enhancement by a factor of $10^{13}$ or more. This could be the source
of CP violation for the baryon asymmetry of the Universe. The main source of
enhancement is the large Yukawa couplings of the heavy $t^\prime$ and
$b^\prime$ quarks. With indications for a new, large CP violating phase
$\sin2\Phi_{B_s}$ emerging at the Tevatron, our suggestion can be verified or
refuted at the LHC in the next few years.


title: Quantum Hall conductance of two-terminal graphene devices

abstract:
  Measurement and theory of the two-terminal conductance of monolayer and
bilayer graphene in the quantum Hall regime are compared. We examine features
of conductance as a function of gate voltage that allow monolayer, bilayer, and
gapped samples to be distinguished, including N-shaped distortions of quantum
Hall plateaus and conductance peaks and dips at the charge neutrality point.
Generally good agreement is found between measurement and theory. Possible
origins of discrepancies are discussed.


title:
Existence of traveling wave solutions for a nonlocal bistable equation:
  an abstract approach

abstract:
  We consider traveling fronts to the nonlocal bistable equation. We do not
assume that the Borel-measure is absolutely continuous with respect to the
Lebesgue measure. We show that there is a traveling wave solution with monotone
profile. In order to prove this result, we would develop a recursive method for
abstract monotone dynamical systems and apply it to the equation.


title: Negative kinetic energy term of general relativity and its removing

abstract:
  We first present a new Lagrangian of general relativity, which can be divided
into kinetic energy term and potential energy term. Taking advantage of
vierbein formalism, we reduce the kinetic energy term to a sum of five positive
terms and one negative term. Some gauge conditions removing the negative
kinetic energy term are discussed. Finally, we present a Lagrangian that only
include positive kinetic energy terms. To remove the negative kinetic energy
term leads to a new field equation of general relativity in which there are at
least five equations of constraint and at most five dynamical equations, this
characteristic is different from the normal Einstein field equation in which
there are four equations of constraint and six dynamical equations.


title:
A Unified Scheme of Measurement and Amplification Processes based on
  Micro-Macro Duality -- Stern-Gerlach experiment as a typical example

abstract:
  A unified scheme for quantum measurement processes is formulated on the basis
of Micro-Macro duality as a mathematical expression of the general idea of
quantum-classical correspondence. In this formulation, we can naturally
accommodate the amplification processes necessary for magnifying quantum state
changes at the microscopic end of the probe system into the macroscopically
visible motion of the measuring pointer. Its essence is exemplified and
examined in the concrete model of the Stern-Gerlach experiment for spin
measurement, where the Helgason duality controlling the Radon transform is seen
to play essential roles.


title:
Quantum Mirrors Via SPDC-Crossing Symmetric Phenomena and a New
  Geometric Optics

abstract:
  In this paper, the crossing symmetry of the photons, from spontaneous
parametric down conversion (SPDC) phenomena in nonlinear crystals, is used for
the development of a new geometric optics based on quantum kinematic
correlations. On this basis, a new interpretation of the recent results on the
two photon entangled experiment is obtained. A new field of applications is
suggested.


title: Finite-g Strings

abstract:
  In view of one day proving the AdS/CFT correspondence, a deeper understanding
of string theory on certain curved backgrounds such as AdS_5xS^5 is required.
In this dissertation we make a step in this direction by focusing on RxS^3. It
was discovered in recent years that string theory on AdS_5xS^5 admits a Lax
formulation. However, the complete statement of integrability requires not only
the existence of a Lax formulation, but also that the resulting integrals of
motion are in pairwise involution. This idea is central to the first part of
this thesis. Exploiting this integrability we apply algebro-geometric methods
to string theory on RxS^3 and obtain the general finite-gap solution. The
construction is based on an invariant algebraic curve previously found in the
AdS_5xS^5 case. However, encoding the dynamics of the solution requires
specification of additional marked points. By restricting the symplectic
structure of the string to this algebro-geometric data we derive the
action-angle variables of the system. We then perform a first-principle
semiclassical quantisation of string theory on RxS^3 as a toy model for strings
on AdS_5xS^5. The result is exactly what one expects from the dual gauge theory
perspective, namely the underlying algebraic curve discretises in a natural
way. We also derive a general formula for the fluctuation energies around the
generic finite-gap solution. The ideas used can be generalised to AdS_5xS^5.


title: Platonic polyhedra tune the 3-sphere: Harmonic analysis on simplices

abstract:
  A spherical topological manifold of dimension n-1 forms a prototile on its
cover, the (n-1)-sphere. The tiling is generated by the fixpoint-free action of
the group of deck transformations. By a general theorem, this group is
isomorphic to the first homotopy group. Multiplicity and selection rules appear
in the form of reduction of group representations. A basis for the harmonic
analysis on the (n-1)-sphere is given by the spherical harmonics which
transform according to irreducible representations of the orthogonal group. The
deck transformations form a subgroup, and so the representations of the
orthogonal group can be reduced to those of this subgroup. Upon reducing to the
identity representation of the subgroup, the reduced subset of spherical
harmonics becomes periodic on the tiling and tunes the harmonic analysis on the
(n-1)-sphere to the manifold. A particular class of spherical 3-manifolds
arises from the Platonic polyhedra. The harmonic analysis on the Poincare
dodecahedral 3-manifold was analyzed along these lines. For comparison we
construct here the harmonic analysis on simplicial spherical manifolds of
dimension n=1,2,3. Harmonic analysis applied to the cosmic microwave background
by selection rules can provide evidence for multiply connected cosmic
topologies.


title: Dynamical modelling of the elliptical galaxy NGC 2974

abstract:
  In this paper we analyse the relations between a previously described oblate
Jaffe model for an ellipsoidal galaxy and the observed quantities for NGC 2974,
and obtain the length and velocity scales for a relevant elliptical galaxy
model. We then derive the finite total mass of the model from these scales, and
finally find a good fit of an isotropic oblate Jaffe model by using the
Gauss-Hermite fit parameters and the observed ellipticity of the galaxy NGC
2974. The model is also used to predict the total luminous mass of NGC 2974,
assuming that the influence of dark matter in this galaxy on the image,
ellipticity and Gauss-Hermite fit parameters of this galaxy is negligible
within the central region, of radius $0.5R_{\rm e}.$


title:
Molecular Gas in a Submillimeter Galaxy at z=4.5: Evidence for a Major
  Merger at 1 Billion Years after the Big Bang

abstract:
  We report the detection of CO molecular line emission in the z=4.5
millimeter-detected galaxy COSMOS_J100054+023436 (hereafter: J100+0234) using
the IRAM Plateau de Bure interferometer (PdBI) and NRAO's Very Large Array
(VLA). The CO(4-3) line as observed with PdBI has a full line width of ~1000
km/s, an integrated line flux of 0.66 Jy km/s, and a CO luminosity of 3.2e10
L_sun. Comparison to the 3.3sigma detection of the CO(2-1) line emission with
the VLA suggests that the molecular gas is likely thermalized to the J=4-3
transition level. The corresponding molecular gas mass is 2.6e10 M_sun assuming
an ULIRG-like conversion factor. From the spatial offset of the red- and
blue-shifted line peaks and the line width a dynamical mass of 1.1e11 M_sun is
estimated assuming a merging scenario. The molecular gas distribution coincides
with the rest-frame optical and radio position of the object while being offset
by 0.5'' from the previously detected Ly$\alpha$ emission. J1000+0234 exhibits
very typical properties for lower redshift (z~2) sub-millimeter galaxies (SMGs)
and thus is very likely one of the long sought after high redshift (z>4)
objects of this population. The large CO(4-3) line width taken together with
its highly disturbed rest-frame UV geometry suggest an ongoing major merger
about a billion years after the Big Bang. Given its large star formation rate
(SFR) of >1000 M_sun/yr and molecular gas content this object could be the
precursor of a 'red-and-dead' elliptical observed at a redshift of z=2.


title:
Topological susceptibility in 2+1 flavors lattice QCD with domain-wall
  fermions

abstract:
  We measure the topological charge and its fluctuation for the gauge
configurations generated by the RBC and UKQCD Collaborations using 2+1 flavors
of domain-wall fermions on the 16^3 x 32 lattice (L \simeq 2 fm) with length 16
in the fifth dimension at inverse lattice spacing a^{-1} \simeq 1.62 GeV. From
the spectral flow of the Hermitian operator H_w (2 + \gamma_5 H_w)^{-1}, we
obtain the topological charge Q_t of each gauge configuration in the three
ensembles with light sea quark masses m_q a = 0.01, 0.02, and 0.03, and with
the strange quark mass fixed at m_s a = 0.04. From our result of Q_t, we
compute the topological susceptibilty \chi_t = < Q_t^2 > /volume. In the small
m_q regime, our result of \chi_t agrees with the chiral effective theory. Using
the formula \chi_t = \Sigma / (m_u^{-1} + m_d^{-1} + m_s^{-1}) by
Leutwyler-Smilga, we obtain the chiral condensate \Sigma^MSbar(2 GeV) =
[259(6)(9) MeV]^3.


title: Ensemble Inequivalence in Single Molecule Experiments

abstract:
  In bulk systems the calculation of the main thermodynamic quantities leads to
the same expectation values in the thermodynamic limit, regardless of the
choice of the statistical ensemble. Single linear molecules can be still
regarded as statistical systems, where the thermodynamic limit is represented
by infinitely long chains. The question of equivalence between different
ensembles is not at all obvious and has been addressed in the literature, with
sometimes contradicting conclusions. We address this problem by studying the
scaling properties of the ensemble difference for two different chain models,
as a function of the degree of polymerization. By characterizing the scaling
behavior of the difference between the isotensional (Gibbs) and isometric
(Helmholtz) ensembles in the transition from the low-stretching to the
high-stretching regime, we show that ensemble equivalence cannot be reached for
macroscopic chains in the low force regime, and we characterize the transition
from the inequivalence to the equivalence regime.


title: Calorimetry for ILC Experiments: CALICE Collaboration R&D

abstract:
  The CALICE Collaboration is carrying out research and development into
calorimetry for a detector at the International Linear Collider (ILC). CALICE
is investigating a range of technologies for both electromagnetic and hadronic
calorimetry. An overview of the prototypes and selected test-beam results are
presented.


title: Cosmic Ray Results from the IceTop Air Shower Array

abstract:
  We report on the first results obtained with the IceTop air shower array on
the cosmic ray energy spectrum and mass composition in the range of 1 PeV to 80
PeV. IceTop is the surface detector of the IceCube neutrino telescope currently
under construction at the South Pole. A high sensitivity to the primary mass
composition was observed by reconstructing showers at different zenith angles.
Assuming only protons or iron nuclei as primary particles yields significantly
different energy spectra for different zenith angle ranges, while only models
with mixed composition, like the poly-gonato model, lead to the expected
isotropic flux. The prospects of composition measurements with different,
alternative methods using the full IceCube detector are also discussed.


title: Impenetrable Barriers in Phase Space for Deterministic Thermostats

abstract:
  We investigate the relation between the phase space structure of Hamiltonian
and non-Hamiltonian deterministic thermostats. We show that phase space
structures governing reaction dynamics in Hamiltonian systems map to the same
type of phase space structures for the non-Hamiltonian isokinetic equations of
motion for the thermostatted Hamiltonian. Our results establish a framework for
analyzing thermostat dynamics using concepts and methods developed in reaction
rate theory.


title: Zero momentum gluons and the total pp and pbarp cross-sections

abstract:
  We describe a QCD motivated model for total cross-sections which uses the
eikonal representation and incorporates QCD mini-jets to drive the rise with
energy of the cross-section, while the impact parameter distribution is
obtained through the Fourier transform of the transverse momentum distribution
of soft gluons emitted in the parton-parton interactions giving rise to
mini-jets in the final state. A singular but integral expression for the
running coupling constant in the infrared region is part of this model.


title: Realizations of Countable Groups as Fundamental Groups of Compacta

abstract:
  It is an open question (Pawlikowski) whether every finitely generated group
can be realized as a fundamental group of a compact metric space. In this paper
we prove that any countable group can be realized as the fundamental group of a
compact subspace of four dimensional Euclidean space. According to theorems of
Shelah (see also Pawlikowski) such space can not be locally path connected if
the group is not finitely generated. This constructions complements realization
of groups in the context of compact Hausdorff spaces, that was studied by
Keesling and Rudyak, and Przezdziecki .


title:
Diagnostics of the Early Explosion Phase of a Classical Nova Using Its
  X-ray Emission: A Model for the X-ray Outburst of CI Camelopardalis in 1998

abstract:
  We have computed a spherically symmetric model for the interaction of matter
ejected during the outburst of a classical nova with the stellar wind from its
optical component.This model is used to describe the intense X-ray outburst
(the peak 3-20 keV flux was ~2 Crab) of the binary system CI Camelopardalis in
1998. According to our model, the stellar wind from the optical component
heated by a strong shock wave produced when matter is ejected from the white
dwarf as the result of a thermonuclear explosion on its surface is the emission
source in the standard X-ray band. Comparison of the calculated and observed
time dependences of the mean radiation temperature and luminosity of the binary
system during its outburst has yielded very important characteristics of the
explosion.We have been able to measure the velocity of the ejected matter
immediately after the onset of the explosion for the first time: it follows
from our model that the ejected matter had a velocity of ~2700 km/s even on
0.1-0.5 day after the outburst onset and it flew with such a velocity for the
first 1-1.5 day under an external force, possibly, the radiation pressure from
the white dwarf. Subsequently, the matter probably became transparent and began
to decelerate. The time dependence of the mean radiation temperature at late
expansion phases has allowed us to estimate the mass of the ejected matter,
~10^{-7}-10^{-6} Msun. The mass loss rate in the stellar wind required to
explain the observed peak luminosity of the binary system during its outburst
has been estimated to be dM/dt ~(1-2)x10^{-6} Msun/yr.


title: HELAS Local Helioseismology Activities

abstract:
  The main goals of the HELAS local helioseismology network activity are to
consolidate this field of research in Europe, to organise scientific workshops,
and to facilitate the distribution of observations and data analysis software.
Most of this is currently accomplished via a dedicated website at
http://www.mps.mpg.de/projects/seismo/NA4/ . In this paper we list the outreach
material, observational data, analysis tools and modelling tools currently
available from the website and describe the focus of the scientific workshops
and their proceedings.


title: Electron and Photon Identification Performance in ATLAS

abstract:
  The understanding of the reconstruction and calibration of electrons and
photons is one of the key steps at the start-up of data-taking with ATLAS at
the LHC (Large Hadron Collider). The calorimeter cells are electronically
calibrated before being clustered. Corrections to local position and energy
measurements are applied to take into account the calorimeter geometry.
Finally, longitudinal weights are applied to correct for energy loss upstream
of the calorimeter. As a last step the Z -> ee events will be used for in-situ
calibration using the Z boson mass. The electron identification is based on the
shower shape in the calorimeter and relies heavily on the tracker and combined
tracker/calorimeter information to achieve the required rejection of 10^5
against QCD jets for a reasonably clean inclusive electron spectrum above 20-25
GeV. For photon identification, in addition to the shower shape in the
calorimeter, recovery of photon conversions is an essential ingredient given
the large amount of material in the inner tracker. The electron and photon
identification methods (cuts and multivariate analysis) will be discussed.


title: Text as Statistical Mechanics Object

abstract:
  In this article we present a model of human written text based on statistical
mechanics approach by deriving the potential energy for different parts of the
text using large text corpus. We have checked the results numerically and found
that the specific heat parameter effectively separates the closed class words
from the specific terms used in the text.


title:
Evidence for CO depletion in the inner regions of gas-rich
  protoplanetary disks

abstract:
  We investigate the physical properties and spatial distribution of Carbon
Monoxide (CO) gas in the disks around the Herbig Ae/Be stars HD 97048 and HD
100546.
  Using high-spectral-resolution 4.588-4.715 $\mu$m spectra containing
fundamental CO emission taken with CRIRES on the VLT, we probe the
circumstellar gas and model the kinematics of the emission lines. By using
spectro-astrometry on the spatially resolved targets, we constrain the physical
size of the emitting regions in the disks. We resolve, spectrally and
spatially, the emission of the $^{13}$CO v(1-0) vibrational band and the
$^{12}$CO $v=1-0, v=2-1, v=3-2$ and $v=4-3$ vibrational bands in both targets,
as well as the $^{12}$CO $v=5-4$ band in HD 100546. Modeling of the CO emission
with a homogeneous disk in Keplerian motion, yields a best fit with an inner
and outer radius of the CO emitting region of 11 and $\geq$ 100 AU for HD
97048. HD 100546 is not fit well with our model, but we derive a lower limit on
the inner radius of 8 AU. The fact that gaseous [OI] emission was previously
detected in both targets at significantly smaller radii suggests that CO may be
effectively destroyed at small radii in the surface layers of these disks


title: Detecting the Most Unusual Part of a Digital Image

abstract:
  The purpose of this paper is to introduce an algorithm that can detect the
most unusual part of a digital image. The most unusual part of a given shape is
defined as a part of the image that has the maximal distance to all non
intersecting shapes with the same form.
  The method can be used to scan image databases with no clear model of the
interesting part or large image databases, as for example medical databases.


title:
Moduli of bordered Riemann Surfaces - Complex structure and K\"ahler
  geometry

abstract: This paper has been withdrawn by the authors.


title:
Time-series Spectroscopy and Photometry of the Pulsating Subdwarf B Star
  PG 1219+534 (KY UMa)

abstract:
  We present observations and analysis of time-series spectroscopy and
photometry of the pulsating subdwarf B star PG 1219+534 (KY UMa). Subdwarf B
stars are blue horizontal branch stars which have shed most of their hydrogen
envelopes. Pulsating subdwarf B stars allow a probe into this interesting phase
of evolution. Low resolution spectra were obtained at the Nordic Optical
Telescope and Kitt Peak National Observatory, and photometric observations were
obtained at MDM and Baker observatories in 2006. We extracted radial velocity
and equivalent width variations from several Balmer and He I lines in
individual spectra. The pulsation frequencies were separated via phase binning
to detect line-profile variations in Balmer and helium lines, which were
subsequently matched to atmospheric models to infer effective temperature and
gravity changes throughout the pulsation cycle.
  From the photometry we recovered the four previously observed frequencies and
detected a new fifth frequency. From the spectra we directly measured radial
velocity and equivalent width variations for the four main frequencies and from
atmospheric models we successfully inferred temperature and gravity changes for
these four frequencies. We compared amplitude ratios and phase differences of
these quantities and searched for outliers which could be identified as
high-degree modes. These are the first such measurements for a "normal"
amplitude pulsating subdwarf B star, indicating that spectroscopic studies can
benefit the majority of pulsating subdwarf B stars.


title:
Macrospin model of incubation delay due to the field-like spin transfer
  torque

abstract:
  We show that the absence of pre-switching oscillations ("incubation delay")
in magnetic tunnel junctions can be explained within the macrospin model by a
sizable field-like component of the spin-transfer torque. It is further
suggested that measurements of the voltage dependence of tunnel junction
switching time in the presence of external easy axis magnetic fields can be
used to determine the magnitude and voltage dependence of the field-like
torque.


title: Coding Theorems for Repeat Multiple Accumulate Codes

abstract:
  In this paper the ensemble of codes formed by a serial concatenation of a
repetition code with multiple accumulators connected through random
interleavers is considered. Based on finite length weight enumerators for these
codes, asymptotic expressions for the minimum distance and an arbitrary number
of accumulators larger than one are derived using the uniform interleaver
approach. In accordance with earlier results in the literature, it is first
shown that the minimum distance of repeat-accumulate codes can grow, at best,
sublinearly with block length. Then, for repeat-accumulate-accumulate codes and
rates of 1/3 or less, it is proved that these codes exhibit asymptotically
linear distance growth with block length, where the gap to the
Gilbert-Varshamov bound can be made vanishingly small by increasing the number
of accumulators beyond two. In order to address larger rates, random puncturing
of a low-rate mother code is introduced. It is shown that in this case the
resulting ensemble of repeat-accumulate-accumulate codes asymptotically
achieves linear distance growth close to the Gilbert-Varshamov bound. This
holds even for very high rate codes.


title:
Sneutrino as Lightest Supersymmetric Particle in B3 mSUGRA Models and
  Signals at the LHC

abstract:
  We consider B3 mSUGRA models where we have one lepton number violating LQD
operator at the GUT scale. This can alter the supersymmetric mass spectrum
leading to a sneutrino as the lightest supersymmetric particle in a large
region of parameter space. We take into account the restrictions from neutrino
masses, the muon anomalous magnetic moment, b -> s gamma and other precision
measurements. We furthermore investigate existing restrictions from direct
searches at LEP, the Tevatron and the CERN p\bar p collider. We then give
examples for characteristic signatures at the LHC.


title:
Time correlation functions and transport coefficients of two-dimensional
  Yukawa liquids

abstract:
  The existence of coefficients for diffusion, viscosity and thermal
conductivity is examined for two-dimensional (2D) liquids. Equilibrium
molecular dynamics simulations are performed using a Yukawa potential, and the
long-time behavior of autocorrelation functions is tested. Advances reported
here as compared to previous 2D Yukawa liquid simulations include an assessment
of the thermal conductivity, using a larger system size to allow meaningful
examination of longer times, and development of improved analysis methods. We
find that the transport coefficient exists for diffusion at high temperature,
and viscosity at low temperature, but not in the opposite limits. The thermal
conductivity coefficient does not appear to exist at high temperature. Further
advances in computing power could improve these assessments by allowing even
larger system sizes and longer time series.


title: On the sum of superoptimal singular values

abstract:
  We discuss the following extremal problem and its relevance to the sum of the
so-called superoptimal singular values of a matrix function: Given an $m\times
n$ matrix function $\Phi$ on the unit circle $\mathbb{T}$, when is there a
matrix function $\Psi_{*}$ in the set $A_{k}^{n,m}$ such that
\int_{\mathbb{T}}{\rm trace}(\Phi(\zeta)\Psi_{*}(\zeta))dm(\zeta)=\sup_{\Psi\in
A_{k}^{n,m}}|\int_{\mathbb{T}}{\rm trace}(\Phi(\zeta)\Psi(\zeta))dm(\zeta)|?
The set $A_{k}^{n,m}$ is defined by A_{k}^{n,m}={\Psi\in H_{0}^{1}:
\|\Psi\|_{L^{1}}\leq 1, {\rm rank}\Psi(\zeta)\leq k{a.e.}\zeta\in T}. We
introduce Hankel-type operators on spaces of matrix functions and prove that
this problem has a solution if and only if the corresponding Hankel-type
operator has a maximizing vector. We also characterize the smallest number $k$
for which \int_{\mathbb{T}}{\rm trace}(\Phi(\zeta)\Psi(\zeta))dm(\zeta) equals
the sum of all the superoptimal singular values of an admissible matrix
function $\Phi$ for some $\Psi\in A_{k}^{n,m}$. Moreover, we provide a
representation of any such function $\Psi$ when $\Phi$ is an admissible very
badly approximable unitary-valued $n\times n$ matrix function.


title: Status report of the NuMoon experiment

abstract:
  We show that at wavelengths comparable to the length of the shower produced
by an Ultra-High Energy cosmic ray or neutrino, radio signals are an extremely
efficient way to detect these particles. First results are presented of an
analysis of 20 hours of observation data for NuMoon project using the
Westerbork Synthesis Radio Telescope to search for short radio pulses from the
Moon. A limit on the neutrino flux is set that is a factor four better than the
current one (based on FORTE).


title: Results on the diffusion equation with rough coefficients

abstract:
  We study the behaviour of the solutions of the stationary diffusion equation
as a function of a possibly rough ($L^{\infty}$-) diffusivity. This includes
the boundary behaviour of the solution maps, associating to each diffusivity
the solution corresponding to some fixed source function, when the diffusivity
approaches infinite values in parts of the medium. In $n$-dimensions, $n \geq
1$, by assuming a weak notion of convergence on the set of diffusivities, we
prove the strong sequential continuity of the solution maps. In 1-dimension, we
prove a stronger result, i.e., the unique extendability of the map of solution
operators, associating to each diffusivity the corresponding solution operator,
to a sequentially continuous map in the operator norm on a set containing
`diffusivities' assuming infinite values in parts of the medium. In this case,
we also give explicit estimates on the convergence behaviour of the map.


title: Top quark properties at ATLAS

abstract:
  The ATLAS potential for the study of the top quark properties and physics
beyond the Standard Model in the top quark sector, is described. The
measurements of the top quark charge, the spin and spin correlations, the
Standard Model decay (t-> bW), rare top quark decays associated to flavour
changing neutral currents (t-> qX with X = gluon, Z, photon) and ttbar
resonances are discussed. The sensitivity of the ATLAS experiment is estimated
for an expected luminosity of 1fb-1 at the LHC. The full simulation of the
ATLAS detector is used. For the Standard Model measurements the expected
precision is presented. For the tests of physics beyond the Standard Model, the
5 sigma discovery potential (in the presence of a signal) and the 95%
Confidence Level (CL) limit (in the absence of a signal) are given.


title: Recent Advances in Diamond Detectors

abstract:
  With the commissioning of the LHC expected in 2009, and the LHC upgrades
expected in 2012, ATLAS and CMS are planning for detector upgrades for their
innermost layers requiring radiation hard technologies. Chemical Vapor
Deposition (CVD) diamond has been used extensively in beam conditions monitors
as the innermost detectors in the highest radiation areas of BaBar, Belle and
CDF and is now planned for all LHC experiments. This material is now being
considered as an alternate sensor for use very close to the interaction region
of the super LHC where the most extreme radiation conditions will exist.
Recently the RD42 collaboration constructed, irradiated and tested
polycrystalline and single-crystal chemical vapor deposition diamond sensors to
the highest fluences available. We present beam test results of chemical vapor
deposition diamond up to fluences of 1.8 x 10^16 protons/cm^2 showing that both
polycrystalline and single-crystal chemical vapor deposition diamonds follow a
single damage curve allowing one to extrapolate their performance as a function
of dose.


title: Compact dimensions and the Casimir effect: the Proca connection

abstract:
  We study the Casimir effect in the presence of an extra dimension
compactified on a circle of radius R ($M^4\times S^1$ spacetime). Our starting
point is the Kaluza Klein decomposition of the 5D Maxwell action into a
massless sector containing the 4D Maxwell action and an extra massless scalar
field and a Proca sector containing 4D gauge fields with masses $m_n=n/R$ where
$n$ is a positive integer. An important point is that, in the presence of
perfectly conducting parallel plates, the three degrees of freedom do not yield
three discrete (non-penetrating) modes but two discrete modes and one continuum
(penetrating) mode. The massless sector reproduces Casimir's original result
and the Proca sector yields the corrections. The contribution from the Proca
continuum mode is obtained within the framework of Lifshitz theory for plane
parallel dielectrics whereas the discrete modes are calculated via 5D formulas
for the piston geometry. An interesting manifestation of the extra compact
dimension is that the Casimir force between perfectly conducting plates depends
on the thicknesses of the slabs.


title: Distinguishing Bing-Whitehead Cantor Sets

abstract:
  Bing-Whitehead Cantor sets were introduced by DeGryse and Osborne in
dimension three and greater to produce examples of Cantor sets that were non
standard (wild), but still had simply connected complement. In contrast to an
earlier example of Kirkor, the construction techniques could be generalized to
dimensions bigger than three. These Cantor sets in $S^{3}$ are constructed by
using Bing or Whitehead links as stages in defining sequences. Ancel and
Starbird, and separately Wright characterized the number of Bing links needed
in such constructions so as to produce Cantor sets. However it was unknown
whether varying the number of Bing and Whitehead links in the construction
would produce non equivalent Cantor sets. Using a generalization of geometric
index, and a careful analysis of three dimensional intersection patterns, we
prove that Bing-Whitehead Cantor sets are equivalently embedded in $S^3$ if and
only if their defining sequences differ by some finite number of Whitehead
constructions. As a consequence, there are uncountably many non equivalent such
Cantor sets in $S^{3}$ constructed with genus one tori and with simply
connected complement.


title: An analysis of the nucleon spectrum from lattice partially-quenched QCD

abstract:
  The chiral extrapolation of the nucleon mass, M_n, is investigated using data
coming from 2-flavour partially-quenched lattice simulations. A large sample of
lattice results from the CP-PACS Collaboration is analysed using the leading
one-loop corrections, with explicit corrections for finite lattice spacing
artifacts. The extrapolation is studied using finite range regularised chiral
perturbation theory. The analysis also provides a quantitative estimate of the
leading finite volume corrections. It is found that the discretisation,
finite-volume and partial quenching effects can all be very well described in
this framework, producing an extrapolated value of M_n in agreement with
experiment. Furthermore, determinations of the low energy constants of the
nucleon mass's chiral expansion are in agreement with previous methods, but
with significantly reduced errors. This procedure is also compared with
extrapolations based on polynomial forms, where the results are less
encouraging.


title:
The Ground State Correlation Energy of the Random Phase Approximation
  from a Ring Coupled Cluster Doubles Approach

abstract:
  We present an analytic proof demonstrating the equivalence between the Random
Phase Approximation (RPA) to the ground state correlation energy and a
ring-diagram simplification of the Coupled Cluster Doubles (CCD) equations. In
the CCD framework, the RPA equations can be solved in $\mathcal{O}(N^4)$
computational effort, where $N$ is proportional to the number of basis
functions.


title: Numerical method for Darcy flow derived using Discrete Exterior Calculus

abstract:
  We derive a numerical method for Darcy flow, hence also for Poisson's
equation in mixed (first order) form, based on discrete exterior calculus
(DEC). Exterior calculus is a generalization of vector calculus to smooth
manifolds and DEC is one of its discretizations on simplicial complexes such as
triangle and tetrahedral meshes. DEC is a coordinate invariant discretization,
in that it does not depend on the embedding of the simplices or the whole mesh.
We start by rewriting the governing equations of Darcy flow using the language
of exterior calculus. This yields a formulation in terms of flux differential
form and pressure. The numerical method is then derived by using the framework
provided by DEC for discretizing differential forms and operators that act on
forms. We also develop a discretization for spatially dependent Hodge star that
varies with the permeability of the medium. This also allows us to address
discontinuous permeability. The matrix representation for our discrete
non-homogeneous Hodge star is diagonal, with positive diagonal entries. The
resulting linear system of equations for flux and pressure are saddle type,
with a diagonal matrix as the top left block. The performance of the proposed
numerical method is illustrated on many standard test problems. These include
patch tests in two and three dimensions, comparison with analytically known
solution in two dimensions, layered medium with alternating permeability
values, and a test with a change in permeability along the flow direction. We
also show numerical evidence of convergence of the flux and the pressure. A
convergence experiment is also included for Darcy flow on a surface. A short
introduction to the relevant parts of smooth and discrete exterior calculus is
included in this paper. We also include a discussion of the boundary condition
in terms of exterior calculus.


title: Dark matter, dark energy and gravitational proprieties of antimatter

abstract:
  We suggest that the eventual gravitational repulsion between matter and
antimatter may be a key for understanding of the nature of dark matter and dark
energy. If there is gravitational repulsion, virtual particle-antiparticle
pairs in the vacuum, may be considered as gravitational dipoles. We use a
simple toy model to reveal a first indication that the gravitational
polarization of such a vacuum, caused by baryonic matter in a Galaxy, may
produce the same effect as supposed existence of dark matter. In addition, we
argue that cancellation of gravitational charges in virtual
particle-antiparticle pairs, may be a basis for a solution of the cosmological
constant problem and identification of dark energy with vacuum energy. Hence,
it may be that dark matter and dark energy are not new, unknown forms of
matter-energy but an effect of complex interaction between quantum vacuum and
known baryonic matter.


title: K+/-e2 search and Lepton Flavor Violation at KLOE

abstract:
  This paper is devoted to the first analyses based on the complete data sample
collected by the KLOE detector at DAPHNE, the Frascati \phi-factory. The result
for the BR(K_S -> \gamma\gamma) and the search for the decay K_S->e+e- are
presented. Particular emphasis is put on the measurement of the ratio of Ke2
and Kmu2 BR's.


title: Q-Value for the Fermi Beta-Decay of 46V

abstract:
  By comparing the Q-values for the 46Ti(3He,t)46V and 47Ti(3He,t)47}V
reactions to the isobaric analog states the Q-value for the superallowed
Fermi-decay of 46V has been determined as Q_{EC}(46V)=(7052.11+/-0.27) keV. The
result is compatible with the values from two recent direct mass measurements
but is at variance with the previously most precise reaction Q-value. As
additional input quantity we have determined the neutron separation energy
S_n(47Ti)=(8880.51+/-0.25) keV.


title:
Efficient Algorithms and Routing Protocols for Handling Transient Single
  Node Failures

abstract:
  Single node failures represent more than 85% of all node failures in the
today's large communication networks such as the Internet. Also, these node
failures are usually transient. Consequently, having the routing paths globally
recomputed does not pay off since the failed nodes recover fairly quickly, and
the recomputed routing paths need to be discarded. Instead, we develop
algorithms and protocols for dealing with such transient single node failures
by suppressing the failure (instead of advertising it across the network), and
routing messages to the destination via alternate paths that do not use the
failed node. We compare our solution to that of Ref. [11] wherein the authors
have presented a "Failure Insensitive Routing" protocol as a proactive recovery
scheme for handling transient node failures. We show that our algorithms are
faster by an order of magnitude while our paths are equally good. We show via
simulation results that our paths are usually within 15% of the optimal for
randomly generated graph with 100-1000 nodes.


title:
Direct Assessment of Vorticity Alignment with Local and Nonlocal Strain
  Rates in Turbulent Flows

abstract:
  A direct Biot-Savart integration is used to decompose the strain rate into
its local and nonlocal constituents, allowing the vorticity alignment with the
local and nonlocal strain rate eigenvectors to be investigated. These strain
rate tensor constituents are evaluated in a turbulent flow using data from
highly-resolved direct numerical simulations. While the vorticity aligns
preferentially with the intermediate eigenvector of the \textit{combined}
strain rate, as has been observed previously, the present results for the first
time clearly show that the vorticity aligns with the most extensional
eigenvector of the \textit{nonlocal} strain rate. This in turn reveals a
significant linear contribution to the vortex stretching dynamics in turbulent
flows.


title: Automorphism groups of cyclic codes

abstract:
  In this article we study the automorphism groups of binary cyclic codes. In
particular, we provide explicit constructions for codes whose automorphism
groups can be described as (a) direct products of two symmetric groups or (b)
iterated wreath products of several symmetric groups. Interestingly, some of
the codes we consider also arise in the context of regular lattice graphs and
permutation decoding.


title: Spectral functions of argon and calcium

abstract:
  Precise knowledge of the cross sections for neutrino interactions with nuclei
is important not only for existing experiments but also for development of
future detectors. When momentum transferred to the nucleus by the probe is high
enough, the impulse approximation is valid, i.e. the nucleus can be described
as composed of independent nucleons and the interaction happens between
neutrino and a single bound nucleon. The cross section of the nucleus is then
expressed as an integral of the free cross section (modified by the off-shell
effect) folded with the so-called spectral function, describing the
distribution of nucleon momenta and energies.
  I present results obtained for the approximate spectral functions of argon
and calcium. The accuracy of the approach is verified by comparison with a
broad spectrum of precise electron-scattering data for the calcium target. Some
of these data lie in the kinematical region corresponding to neutrino
interactions what indirectly shows that a similar level of accuracy is achieved
for neutrinos. The calculated Ar(nu_mu,mu) cross section is significantly lower
than the one predicted within the Fermi gas model.