VIRTUAL-PHOTON BREMSSTRAHLUNG IN A QUARK-GLUON PLASMA

被引：36
作者：
CLEYMANS, J
GOLOVIZNIN, VV
REDLICH, K
机构：
[1] UNIV CAPE TOWN,DEPT PHYS,RONDEBOSCH 7700,SOUTH AFRICA
[2] KURCHATOV INST ATOM ENERGY,123182 MOSCOW,RUSSIA
[3] UNIV WROCLAW,DEPT THEORET PHYS,PL-50137 WROCLAW,POLAND
来源：
PHYSICAL REVIEW D | 1993年 / 47卷 / 03期
关键词：
D O I：
10.1103/PhysRevD.47.989
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The production of dielectron pairs due to bremsstrahlung of quarks is calculated in a hot quark-gluon plasma. It is shown that multiple scattering of quarks leads to an infrared stable result for dielectron emission rates. The influence of the Landau-Pomeranchuk effect, due to destructive interference of virtual photons, is calculated and analyzed. For the soft electromagnetic signal from a QCD plasma, this effect is more important than the one due to the thermal quark mass; it furthermore reduces significantly the dielectron production rates. It is also shown that in the low invariant-mass region the contributions from quark and pion virtual bremsstrahlung are of the same order of magnitude.
引用
收藏
页码：989 / 997
页数：9
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