Pion propagation at finite temperature
- 1 June 1993
- journal article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 47 (11) , 5138-5155
- https://doi.org/10.1103/physrevd.47.5138
Abstract
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.Keywords
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