PION PROPAGATION AT FINITE-TEMPERATURE

被引:64
作者
SCHENK, A
机构
[1] Institute for Theoretical Physics, University of Bern, CH-3012 Bern
来源
PHYSICAL REVIEW D | 1993年 / 47卷 / 11期
关键词
D O I
10.1103/PhysRevD.47.5138
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We calculate the pole shift of the pion up to second order in the density, considering the low-temperature expansion of the axial two-point function. To this order both absorptive and dispersive properties of pions are completely determined by two- and three-particle S-matrix elements. In particular, we show how the pole shift can be expressed in terms of these scattering amplitudes and discuss the size of corrections from three-particle collisions.
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页码:5138 / 5155
页数:18
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