Bremsstrahlung of a quark propagating through a nucleus

被引：171

作者：

Kopeliovich, BZ

Schäfer, A

Tarasov, AV

机构：

[1] Max Planck Inst Kernphys, D-69029 Heidelberg, Germany

[2] Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia

[3] Heidelberg Univ, Inst Theoret Phys, D-69120 Heidelberg, Germany

[4] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany

来源：

PHYSICAL REVIEW C | 1999年 / 59卷 / 03期

关键词：

D O I：

10.1103/PhysRevC.59.1609

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The density of gluons produced in the central rapidity region of a heavy-ion collision is poorly known. We investigate the influence of the effects of quantum coherence on the transverse momentum distribution of photons and gluons radiated by a quark propagating through nuclear matter. We describe the case where the radiation time substantially exceeds the nuclear radius (the relevant case for RHIC and LHC energies), which is different from what is known as the Landau-Pomeranchuk-Migdal effect corresponding to an infinite medium. We find suppression of the radiation spectrum at small transverse photon(gluon) momentum k(T), but enhancement for k(T)>1 GeV. Any nuclear effects vanish for k(T)greater than or equal to 10 GeV. Our results also allow us to calculate the k(T)-dependent nuclear effects in prompt photon, light, and heavy (Drell-Yan) dilepton and hadron production. [S0556-2813(99)05003-7].

引用

页码：1609 / 1619

页数：11

共 34 条

[1] NUCLEAR-DEPENDENCE OF DIMUON PRODUCTION AT 800 GEV [J].