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arXiv · 2205.11436

Pion damping width and pion spectral function in hot pion gas

D. Goderidze·A. Friesen·Yu. Kalinovsky
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Abstract

The temperature behaviour of the pion width in the hadronic phase is investigated in the framework of the NJL model. The contribution to the width from the pion-pion collision is considered with a scalar sigma-meson as an intermediate state. It is shown that the pion width significantly broadens at $T>0.1$ GeV. Using the two-step iteration method, suggested by Kadanoff and Baym, the pion spectral function in a hot pion gas is calculated at different temperatures.

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D. Goderidze, A. Friesen, Yu. Kalinovsky. 2022-05-23. Pion damping width and pion spectral function in hot pion gas. https://doi.org/10.1142/s0217751x22501354

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