Azimuthal correlations of heavy quarks in Pb plus Pb collisions at √s=2.76 TeV at the CERN Large Hadron Collider

被引：88
作者：
Nahrgang, Marlene [1 ,2 ]
Aichelin, Jorg [1 ]
Gossiaux, Pol Bernard [1 ]
Werner, Klaus [1 ]
机构：
[1] Univ Nantes, Ecole Mines Nantes, IN2P3 CNRS, SUBATECH,UMR 6457, F-44307 Nantes 3, France
[2] FIAS, D-60438 Frankfurt, Germany
来源：
PHYSICAL REVIEW C | 2014年 / 90卷 / 02期
关键词：
RADIATIVE ENERGY-LOSS; GLUON RADIATION; QCD; BREMSSTRAHLUNG; THERMALIZATION; LHC;
D O I：
10.1103/PhysRevC.90.024907
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：
In this paper we study the azimuthal correlations of heavy quarks in Pb + Pb collisions with root s = 2.76 TeV at the Large Hadron Collider. Due to the interaction with the medium, heavy quarks and antiquarks are deflected from their original direction and the initial correlation of the pair is broadened. We investigate this effect for different transverse momentum classes. Low-momentum heavy-quark pairs lose their leading-order back-to-back initial correlation, while a significant residual correlation survives at large momenta. Due to the larger acquired average deflection from their original directions the azimuthal correlations of heavy-quark pairs are broadened more efficiently in a purely collisional energy loss mechanism compared to that including radiative corrections. This discriminatory feature survives when next-to-leading-order production processes are included.
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页数：14
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