Two perspectives for the thermal behavior of an effective hadronic coupling constant
| Autor: | C. van Gend, Cesareo A. Dominguez, Marcelo Loewe |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Physics
Coupling constant Nuclear and High Energy Physics Sigma model Condensed matter physics High Energy Physics::Lattice Nuclear Theory Vertex function Radius Deconfinement Atomic and Molecular Physics and Optics Pion Quantum electrodynamics Sum rule in quantum mechanics Nuclear Experiment Nucleon |
| Zdroj: | Nuclear Physics B - Proceedings Supplements. 74:163-166 |
| ISSN: | 0920-5632 |
| DOI: | 10.1016/s0920-5632(99)00155-3 |
| Popis: | 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 monotonically increasing function of T , diverging at the critical temperature. We interpret this fact as (analytical) evidence for deconfinement. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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