The QCD collisional energy loss revised

Abstract

It is shown that to leading order the QCD collisional energy loss reads $dE/dx\sim \alpha (m_D^2)T^2$. Compared to prevalent expressions, $d{E}^B/dx\sim {\alpha }^2{T}^2\ln (ET/m_D^2)$, which could be considered adaptions of the (QED) Bethe-Bloch formula, the rectified result takes into account the running coupling, as dictated by renormalization. As one significant consequence, due to asymptotic freedom, the collisional energy loss becomes independent of the jet energy $E$. Some implications with regard to heavy ion collisions are pointed out.

2 figures

Cited by in corpus (13)

• The Physics of Glueballs
• Towards an understanding of the RHIC single electron data
• Radiative and Collisional Jet Energy Loss in the Quark-Gluon Plasma at RHIC
• Collisional energy loss of a fast heavy quark in a quark-gluon plasma
• Momentum Broadening in an Anisotropic Plasma
• Parton energy loss in an expanding quark-gluon plasma: Radiative vs collisional
• Collisional Energy Loss of a Fast Muon in a Hot QED Plasma
• Energy gain of heavy quarks by fluctuations in the QGP
• Effects of the Running of the QCD Coupling on the Energy Loss in the Quark-Gluon Plasma
• Improving a radiative plus collisional energy loss model for application to RHIC and LHC
• Collisional jet quenching becomes probable
• Collisional Energy Loss of a Fast Parton in a QGP
• Glueball-Induced Partonic Energy Loss in Quark-Gluon Plasma