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Finite Temperature Pion Scattering to one-loop in Chiral Perturbation Theory

A. Gomez Nicola·F. J. LLanes-Estrada·J. R. Pelaez
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Abstract

We present the pion-pion elastic scattering amplitude at finite temperature to one-loop in Chiral Perturbation Theory. The thermal scattering amplitude properly defined allows to generalize the perturbative unitarity relation to the $T\neq 0$ case. Our result provides a model independent prediction of an enhanced pion-pion low-energy phase shift with the temperature and it has physical applications within the context of Relativistic Heavy Ion Collisions.

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A. Gomez Nicola, F. J. LLanes-Estrada, J. R. Pelaez. 2002-10-04. Finite Temperature Pion Scattering to one-loop in Chiral Perturbation Theory. https://doi.org/10.1016/s0370-2693(02)02959-3

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