Pion-nucleon coupling at finite temperature

Dominguez, C. A.; van Gend, C; Loewe, M.


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. © 1998 Published by Elsevier Science B.V. All rights reserved.

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Título de la Revista: PHYSICS LETTERS B
Volumen: 429
Número: 1-2
Editorial: Elsevier
Fecha de publicación: 1998
Página de inicio: 64
Página final: 71
URL: http://www.scopus.com/inward/record.url?eid=2-s2.0-0346500705&partnerID=q2rCbXpz