Heavy-flavor dynamics in nucleus-nucleus collisions: from the RHIC to the LHC

被引：31

作者：

Monteno, M. ^{[1
]}

Alberico, W. M. ^{[1
,2
]}

Beraudo, A. ^{[3
,4
]}

De Pace, A. ^{[1
]}

Molinari, A. ^{[1
,2
]}

Nardi, M. ^{[1
]}

Prino, F. ^{[1
]}

机构：

[1] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy

[2] Univ Turin, Dipartimento Fis Teor, I-10125 Turin, Italy

[3] Ctr Studi & Ric Enrico Fermi, Rome, Italy

[4] CERN, Dept Phys, Theory Unit, CH-1211 Geneva 23, Switzerland

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2011年 / 38卷 / 12期

关键词：

D O I：

10.1088/0954-3899/38/12/124144

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：

The stochastic dynamics of c and b quarks in the fireball created in nucleus-nucleus collisions at the RHIC and LHC is studied employing a relativistic Langevin equation, based on a picture of multiple uncorrelated random collisions with the medium. Heavy-quark transport coefficients are evaluated within a pQCD approach, with a proper HTL resummation of medium effects for soft scatterings. The Langevin equation is embedded in a multi-step setup developed to study heavy-flavor observables in pp and AA collisions, starting from a NLO pQCD calculation of initial heavy-quark yields, complemented in the nuclear case by shadowing corrections, k(T)-broadening and nuclear geometry effects. Then, only for AA collisions, the Langevin equation is solved numerically in a background medium described by relativistic hydrodynamics. Finally, the propagated heavy quarks are made hadronize and decay into electrons. Results for the nuclear modification factor R-AA of heavy-flavor hadrons and electrons from their semi-leptonic decays are provided, both for RHIC and LHC beam energies.

引用

页数：4

共 24 条

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