Journalartikel

Jahr der Veröffentlichung: 2007

Zeitschrift: Physical Review C

Bandnummer: 75

Heftnummer: 3

ISSN: 2469-9985

eISSN: 2469-9993

Open Access Status: Green

DOI Link: https://doi.org/10.1103/PhysRevC.75.034906

Verlag: American Physical Society

Abstract: 
In the calculation of the collisional energy loss of hard partons in the hot quark gluon plasma, loop corrections to the tree-level amplitudes are essential: Not only do they provide the necessary screening of long-range interactions, but they also induce the momentum dependence of the coupling alpha. The latter fact, as we argued recently, leads to a crucial modification of the hitherto existing theory of this observable. Instead of dE(coll)(B)/dx similar to alpha(2)T(2)ln(ET/m(D)(2)), as first derived by Bjorken, the mean energy loss actually reads dE(coll)/dx similar to alpha(m(D)(2))T-2 for E > T. Here we evaluate, within this mended framework, a less "inclusive" quantity, namely the probability distribution ("quenching weights") of the collisional energy loss, which is necessary to describe jet quenching in heavy-ion collisions. The result is unambiguously determined by Lambda(QCD) (whereas previous approaches involved "guessing" a value for the coupling). Representative Monte Carlo simulations then suggest a substantial collisional component of jet quenching-which hints at a natural explanation of the "single electron puzzle."

Harvard-Zitierstil: Peshier, A. (2007) Collisional jet quenching becomes probable, Physical Review C, 75(3), Article 034906. https://doi.org/10.1103/PhysRevC.75.034906

APA-Zitierstil: Peshier, A. (2007). Collisional jet quenching becomes probable. Physical Review C. 75(3), Article 034906. https://doi.org/10.1103/PhysRevC.75.034906