DILEPTON RADIATION FROM CASCADING PARTONS IN ULTRARELATIVISTIC NUCLEAR COLLISIONS

被引：57

作者：

GEIGER, K

KAPUSTA, JI

机构：

[1] School of Physics and Astronomy, University of Minnesota, Minneapolis

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.70.1920

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We compute the radiation of lepton pairs by the quarks during a central collision between gold nuclei at energy of the Brookhaven Relativistic Heavy Ion Collider (square-root s = 200A GeV) within the parton cascade model. The distribution of radiated pairs evolves smoothly from the initial Drell-Yan type reactions all the way towards equilibrium radiation. Contributions from reactions involving secondary partons dominate the Drell-Yan yield by at least a factor of 5 even at an invariant mass of 8 GeV. Therefore, experiments can test the evolution of partons towards thermal equilibrium at these energies.

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页码：1920 / 1923

页数：4

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