WHAT LEPTON PAIRS REVEAL ABOUT PIONS IN THE NUCLEAR MEDIUM

被引：41

作者：

KORPA, CL ^{[1
]}

PRATT, S ^{[1
]}

机构：

[1] UNIV WISCONSIN,DEPT PHYS,MADISON,WI 53706

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 64卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.64.1502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We calculate the pion spectrum and its electromagnetic annihilation vertex in nuclear matter taking into account the strong interaction. For nuclear densities the pion kinetic energy is approximately compensated by the interaction, but also the free-pion annihilation matrix element is almost canceled by the contribution from the interaction with the medium. Consequently, the enhancement of the dilepton production rate due to the softening of the pion spectrum is strongly reduced. © 1990 The American Physical Society.

引用

页码：1502 / 1505

页数：4

共 18 条

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[2]

BROWN GE, 1964, UNIFIED THEORY NUCLE

[3] ISOBARS, TRANSITION POTENTIALS AND SHORT-RANGE REPULSION IN NUCLEON-NUCLEON INTERACTION [J].