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

页码：989 / 997

页数：9

共 30 条

[1] LOW-MASS DILEPTONS AT HIGH MOMENTA IN ULTRA-RELATIVISTIC HEAVY-ION COLLISIONS [J].