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arXiv · hep-ph/9803469

Pion-Nucleon coupling at finite temperature

C. A. Dominguez·C. van Gend·M. Loewe
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Abstract

The pion nucleon vertex function at finite temperature is studied in the framework of: (a) the thermal (linear) sigma model to leading (one-loop) order, and (b) a thermal QCD-Finite Energy Sum Rule. Results from both methods indicate that the strength of the pion-nucleon coupling decreases with increasing T, vanishing at a critical temperature. The associated mean-square radius is a monotonically increasing function of T, diverging at the critical temperature. This is interpreted as (analytical) evidence for the quark-gluon deconfinement phase transition.

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C. A. Dominguez, C. van Gend, M. Loewe. 1998-03-27. Pion-Nucleon coupling at finite temperature. https://doi.org/10.1016/s0370-2693(98)00453-5

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