skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Effects of the running of the QCD coupling on the energy loss in the quark-gluon plasma

Abstract

Finite temperature modifies the running of the QCD coupling {alpha}{sub s}(k,T) with resolution k. After calculating the thermal quark and gluon masses self-consistently, we determine the quark-quark and quark-gluon cross sections in the plasma based on the running coupling. We find that the running coupling enhances these cross sections by factors of two to four depending on the temperature. We also compute the energy loss (dE/dx) of a high-energy quark in the plasma as a function of temperature. Our study suggests that, beside t-channel processes, inverse Compton scattering is a relevant process for a quantitative understanding of the energy loss of an incident quark in a hot plasma.

Authors:
 [1];  [1];  [2]
  1. Institute for Theoretical Physics, University of Heidelberg, Philosophenweg 19, 69120 Heidelberg (Germany)
  2. (Germany)
Publication Date:
OSTI Identifier:
21020078
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevD.75.054031; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COMPTON EFFECT; COUPLING; CROSS SECTIONS; ENERGY LOSSES; GLUONS; QUANTUM CHROMODYNAMICS; QUARK MATTER; QUARK-GLUON INTERACTIONS; QUARK-QUARK INTERACTIONS; QUARKS; REST MASS; T CHANNEL

Citation Formats

Braun, Jens, Pirner, Hans-Juergen, and Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, 69117 Heidelberg. Effects of the running of the QCD coupling on the energy loss in the quark-gluon plasma. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.054031.
Braun, Jens, Pirner, Hans-Juergen, & Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, 69117 Heidelberg. Effects of the running of the QCD coupling on the energy loss in the quark-gluon plasma. United States. doi:10.1103/PHYSREVD.75.054031.
Braun, Jens, Pirner, Hans-Juergen, and Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, 69117 Heidelberg. Thu . "Effects of the running of the QCD coupling on the energy loss in the quark-gluon plasma". United States. doi:10.1103/PHYSREVD.75.054031.
@article{osti_21020078,
title = {Effects of the running of the QCD coupling on the energy loss in the quark-gluon plasma},
author = {Braun, Jens and Pirner, Hans-Juergen and Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, 69117 Heidelberg},
abstractNote = {Finite temperature modifies the running of the QCD coupling {alpha}{sub s}(k,T) with resolution k. After calculating the thermal quark and gluon masses self-consistently, we determine the quark-quark and quark-gluon cross sections in the plasma based on the running coupling. We find that the running coupling enhances these cross sections by factors of two to four depending on the temperature. We also compute the energy loss (dE/dx) of a high-energy quark in the plasma as a function of temperature. Our study suggests that, beside t-channel processes, inverse Compton scattering is a relevant process for a quantitative understanding of the energy loss of an incident quark in a hot plasma.},
doi = {10.1103/PHYSREVD.75.054031},
journal = {Physical Review. D, Particles Fields},
number = 5,
volume = 75,
place = {United States},
year = {Thu Mar 01 00:00:00 EST 2007},
month = {Thu Mar 01 00:00:00 EST 2007}
}