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Two perspectives for the thermal behavior of an effective hadronic coupling constant

✍ Scribed by C.A. Dominguez; C. van Gend; M. Loewe

Book ID: 104355677
Publisher: Elsevier Science
Year: 1999
Tongue: English
Weight: 383 KB
Volume: 74
Category: Article
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(99)00155-3

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✦ Synopsis

The pion nucleon vertex function at finite temperature is studied in two frameworks: (a) the thermal (linear) sigma model to leading (one-loop) order, and (b) a thermal QCD-Finite Energy Sum Rule. Both approaches 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 monot.onically increasing function of T. diverging at, t,he critical temperature. We interpret. this fact. as (analytical) evidence for deconfinement.

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