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arXiv · 0805.3719

Thermal Behaviour of $π-π$ Scattering Lengths in the Nambu--Jona-Lasinio model

M. Loewe·Jorge Ruiz A.·J. C. Rojas
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Abstract

We calculate the thermal evolution of $π-π$ scattering lengths, in the frame of the Nambu--Jona-Lasinio model. The thermal corrections were calculated at the one loop level using Thermofield Dynamics. We present also results for the pion thermal mass. Our procedure implies the modeling of a propagating scalar meson as a resumation of chains of quark bubbles, which is presented explicitly. We compare our results with previous analysis of this problem in the frame of different theoretical approaches.

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M. Loewe, Jorge Ruiz A., J. C. Rojas. 2008-05-23. Thermal Behaviour of $π-π$ Scattering Lengths in the Nambu--Jona-Lasinio model. https://doi.org/10.1103/physrevd.78.096007

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