Pseudoscalar neutral mesons in hot and dense matter

The behavior of neutral pseudoscalar mesons π0,η and η′ in hot and dense matter is investigated, in the framework of the three flavor Nambu–Jona-Lasinio model. Three different scenarios are considered: zero density and finite temperature, zero temperature and finite density in a flavor asymmetric me...

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Bibliographic Details
Published in:Physics letters. B 2003-05, Vol.560 (3-4), p.171-177
Main Authors: Costa, P, Ruivo, M.C, Kalinovsky, Yu.L
Format: Article
Language:English
Subjects:
Chiral symmetry
Finite temperature and density
NJL model
Phase transition
Pseudoscalar mesons
Strange quark matter
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Summary:The behavior of neutral pseudoscalar mesons π0,η and η′ in hot and dense matter is investigated, in the framework of the three flavor Nambu–Jona-Lasinio model. Three different scenarios are considered: zero density and finite temperature, zero temperature and finite density in a flavor asymmetric medium with and without strange valence quarks, and finite temperature and density. The behavior of mesons is analyzed in connection with possible signatures of restoration of symmetries. In the high density region and at zero temperature it is found that the mass of the η′ increases, the deviation from the mass of the η being more pronounced in matter without strange valence quarks.
ISSN:0370-2693
1873-2445
DOI:10.1016/S0370-2693(03)00395-2