BAMPS with the improved Gunion-Bertsch matrix element

作者：Senzel Florian^*; Fochler Oliver; Uphoff Jan; Xu Zhe; Greiner Carsten

来源：Nuclear Physics A, 2014, 932: 158-163.

DOI：10.1016/j.nuclphysa.2014.07.028

• Quark-gluon plasma
• Transport model
• Boltzmann equation
• Nuclear modification factor
• Elliptic flow

Focusing on the simultaneous investigation of the hard and the soft regime of ultra-relativistic heavy-ion collisions at the Relativistic Heavy-Ion Collider (RHIC) at the Brookhaven National Laboratory (BNL) and the Large Hadron Collider (LHC) at CERN, we present our recent results on the nuclear modification factor R-AA and the elliptic flow v(2) within the partonic transport model BAMPS (Boltzmann Approach to Multi-Parton Scatterings). While using interactions provided by perturbative QCD, BAMPS allows the full 3+1D simulation of the quark-gluon plasma (QGP) at the microscopic level by solving the relativistic Boltzmann equation for quarks and gluons. The microscopic interactions include both elastic 2 2 collisions, calculated by screened leading order pQCD matrix elements, and inelastic 2 %26lt;-%26gt; 3 processes, calculated within an improved Gunion-Bertsch approximation. Furthermore, for all partonic processes a microscopic, running coupling is explicitly taken into account. We show that when fixing the parameter X-LPM resulting from the effective modeling of the Landau-Pomeranchuk-Migdal effect, we find not only a good description of R-AA at both RHIC and LHC, but also a sizable elliptic flow is built up within the partonic phase.

• 出版日期2014-12
• 单位清华大学