Probing collectivity in ultra-relativistic heavy ion collision by leptons and photons

被引：0

作者：

Alam, Jan-e ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Ctr Variable Energy Cyclotron, Div Theoret Phys, Kolkata 700064, W Bengal, India

来源：

NUCLEAR PHYSICS A | 2011年 / 862-63卷

关键词：

Heavy ion collision; quark gluon plasma; photons; dileptons; GLUON; FLUCTUATIONS;

D O I：

10.1016/j.nuclphysa.2011.05.040

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

It has been shown that the evolution of collectivity in ultra-relativistic heavy ion collision is manifested in the variation of various HBT radii with invariant mass (M) extracted from the correlation functions of two lepton pairs. The value of the radial velocity (v(r)) can be estimated from the ratio of the p(T) distributions of single photons to lepton pairs for various M windows. It has been argued that the variation of radial flow with appropriate kinematic variables can he used as an indicator of a phase transition from initially produced partons to hadrons. We also consider the elliptic flow (v(2)(HF)) of the matter as probed by the single electron spectra originating from the semileptonic decays of heavy mesons. The measured values of v(2)(HF) and the nuclear suppression factor (R-AA) at RHIC energy have been reproduced simultaneously by including both the collisional and radiative processes within the scope of perturbative quantum chromodynamics. The R-AA and v(2)(HF) have been predicted for LHC energy.

引用

页码：192 / 197

页数：6

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