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

作者：Nahrgang Marlene^*; Aichelin Jorg; Gossiaux Pol Bernard; Werner Klaus

来源：PHYSICAL REVIEW C, 2014, 90(2): 024907.

DOI：10.1103/PhysRevC.90.024907

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.

• 出版日期2014-8-18