Azimuthal correlations of heavy quarks in Pb + Pb collisions ats=2.76TeV at the CERN Large Hadron Collider

2013/05/31 by Marlene Nahrgang, J. Aichelin, Joerg Aichelin +4 · 1 citation
Physics and Astronomy · #Azimuth #High-Energy Particle Collisions Research #Large Hadron Collider #Nuclear physics #Optics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quark #hep-ph #nucl-ex #nucl-th

paper · pdf · doi:10.1103/physrevc.90.024907

published as Phys. Rev. C 90, 024907 (2014) · final, published version

arxiv created 2014/08/14 · openalex publication_date 2014/08/18 · arxiv updated 2014/08/27 · openalex created_date 2016/09/30 · openalex updated_date 2026/08/05

Abstract

In this paper we study the azimuthal correlations of heavy quarks in Pb+Pb collisions with √(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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• Heavy flavour energy loss from AdS/CFT: A novel diffusion coefficient

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