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The SU(2) and SU(3) chiral phase transitions within chiral perturbation theory

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Peláez Sagredo, José Ramón (2002) The SU(2) and SU(3) chiral phase transitions within chiral perturbation theory. Physical Review D, 66 (9). ISSN 0556-2821

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Official URL: http://dx.doi.org/http://dx.doi.org/10.1103/PhysRevD.66.096007


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Abstract

The SU(2) and SU(3) chiral phase transitions in a gas made of pions, kaons, and etas are studied within the framework of chiral perturbation theory. We describe the temperature dependence of the quark condensates by using the meson meson scattering phase shifts in a second order virial expansion. In particular, the SU(3) formalism yields a somewhat lower melting temperature for the nonstrange condensates than within SU(2), and also predicts that the strange condensate melting is slower than that of the nonstrange, due to the different strange and nonstrange quark masses.


Item Type:Article
Additional Information:

©2002 The American Physical Society.
The author thanks A. Dobado, A. Gómez Nicola and E. Oset for useful comments, and support from the Spanish CICYT
projects FPA2000 0956 and BFM2000 1326, as well as the Marie Curie fellowship through Grant No. MCFI-2001-01155.

Uncontrolled Keywords:One-loop; Form-factors; Meson interactions; Virial expansion; Quark mass; Pion gas; Scattering; Qcd; Unitarization; Lagrangians
Subjects:Sciences > Physics > Physics-Mathematical models
Sciences > Physics > Mathematical physics
ID Code:35596
Deposited On:09 Feb 2016 17:57
Last Modified:10 Dec 2018 15:10

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