Strange baryons in a hot and dense medium within the Nambu-Jona-Lasinio model

Abstract

Using an extended version of the Nambu-Jona-Lasinio model we build a simple description of the baryons as diquark-quark bound states. First, a description of the diquarks in a dense and hot medium is presented. Then, we introduce the formalism for the baryons based on the Faddeev equation associated with the so-called `` static approximation'' which finally gives a Bethe-Salpeter equation in the diquarks-quarks channel. By identifying the baryons with the bound states, we can obtain a description of their properties. In particular, we obtain the right mass spectrum for the proton, $\Lambda$, $\Xi$, and $\Sigma$ at T=0 and $\mu =0$. We extend the formalism to finite temperature and density to obtain a description of the mass change of these baryons in the medium.

5 pages, 3 figures Talk given at 6th International Conference on Strange Quarks in Matter: 2001: A Flavorspace Odyssey (SQM2001), Frankfurt, Germany, 25-29 Sep 2001

References in corpus (4)

• Recent Progress in Quantum Hadrodynamics
• In-Medium Modifications of Hadron Masses and Chemical Freeze-Out in Ultra-Relativistic Heavy-Ion Collisions
• Hypermatter in chiral field theory
• Hadronization and Strangeness Production in a Chirally Symmetric Nonequilibrium Model

Cited by in corpus (4)

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• Flavor dependence of baryon melting temperature in effective models of QCD
• Baryons in the Nambu Jona-Lasinio models
• Baryon and meson masses in the Nambu--Jona-Lasinio model: A Bayesian approach