I concentrate on the midrapidity region, $x_{BJ}>0.01$, where Eq.(1) was conclusively satisfied.

${\rm \bf P_{QCD}}$ and Bulk Collective Flow
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The identification of a new form of “bulk matter” requires the observation of novel and uniquely different collective properties from ones seen before. This requirement is the first term in Eq.(1). In heavy ion collisions, the primary observables of bulk collectivity are the radial, azimuthal and longitudinal flow patterns of hundreds or now thousands of produced hadrons. Stocker, Greiner, and collaborators were the first to predict [@Hofmann:by; @Stocker:bi; @Stocker:ci; @Stocker:vf; @Stocker:pg] distinctive “side splash and squeeze-out” collective flow patterns in nuclear collisions. The different types of collective flows are conveniently quantified in terms of the first few azimuthal Fourier components [@Ollitrault:bk], $v_n(y,p_T,N_p,h)$, of centrality selected triple differential inclusive distribution of hadrons, $h$. The centrality or impact parameter range is usually specified by a range of associated multiplicities, from which the average number of participating nucleons, $N_p$, can be deduced. The azimuthal angle of the hadrons are measured relative to a globally determined estimate for the collision reaction plane angle $\Phi(M)$. The “directed” $v_1$ and “elliptic” $v_2$ flow components [@Reisdorf:1997fx; @Ollitrault:bk; @Voloshin:1999gs]-[@Back:2002ft] are readily identified from azimuthal dependence $$\begin{aligned}
\frac{dN_h(N_p)}{dydp_T^2d\phi}
=\frac{dN_h(N_p)}{dydp_T^2} 