Nuclear suppression of light hadrons and single electrons at RHIC and LHC

Abstract

We examine whether it is possible to simultaneously describe the experimental data from RHIC and LHC on nuclear suppression of light hadrons and non-photonic single electrons in the pQCD picture of parton energy loss. We perform calculations accounting for both radiative and collisional energy loss. We show that once the coupling constant is fixed from comparison with data on the nuclear modification factor for light hadrons it gives a satisfactory agreement with data on the electron R_{AA} and azimuthal anisotropy v_2. Our results show that the collisional mechanism is only of marginal significance in nuclear suppression of single electrons except for the bottom contribution at momenta < 6-8 GeV.

14 pages, 5 figures, J.Phys. G accepted

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• Medium modification of photon-tagged and inclusive jets in high-multiplicity proton-proton collisions
• Color randomization of fast gluon-gluon pairs in the quark-gluon plasma
• Jet quenching with $T$-dependent running coupling
• Updated analysis of jet quenching at RHIC and LHC within the light cone path integral approach
• Synchrotron contribution to photon emission from quark-gluon plasma
• Radiative quark $p_T$-broadening in a quark-gluon plasma beyond the soft gluon approximation
• Flavor dependence of jet quenching in $pp$ collisions and its effect on the $R_{AA}$ for heavy mesons
• Radiative $p_{\perp }$-broadening of fast partons in an expanding quark-gluon plasma
• Phenomenology of collinear photon emission from quark-gluon plasma in $AA$ collisions
• Medium-modification of photon-tagged jets in $AA$ collisions
• Jet quenching for heavy flavors in $AA$ and $pp$ collisions
• On the use of running ${\alpha }_s$ in calculations of radiative energy loss of fast partons in a quark-gluon plasma
• Radiative quark $p_{\perp }$-broadening in a quark-gluon plasma at RHIC and LHC energies