DILEPTON PRODUCTION FROM PION PION ANNIHILATION IN A NUCLEAR MEDIUM

被引：31

作者：

KORPA, CL

XIONG, L

KO, CM

SIEMENS, PJ

机构：

[1] TEXAS A&M UNIV SYST,INST CYCLOTRON,COLLEGE STN,TX 77843

[2] TEXAS A&M UNIV SYST,DEPT PHYS,COLLEGE STN,TX 77843

来源：

PHYSICS LETTERS B | 1990年 / 246卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(90)90609-A

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have calculated the dilepton production rate from pion-pion annihilation in hot and dense nuclear matter. The effect of the strong pion-nucleon interaction on both the pion spectrum and its electromagnetic annihilation vertex has been included in the delta-hole model. We find that the previously predicted cancellation of these two effects for dileptons with zero three-momentum is substantially reduced when their momenta are finite. Including the finite width of delta removes the cancellation even for dileptons with zero three-momentum. © 1990.

引用

页码：333 / 336

页数：4

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