Stability of the pion and the pattern of chiral symmetry breaking

Stability of the pion and the pattern of chiral symmetry breaking

We investigate the pressure of the pion, which should be equal to zero to ensure the stability of the pion, within the framework of the chiral quark model beyond the chiral limit. The pressure of the pion vanishes nontrivially by the Gell-Mann-Oakes-Renner relation within the present framework. This...

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Veröffentlicht in:Physical review. D, Particles, fields, gravitation, and cosmology Particles, fields, gravitation, and cosmology, 2014-12, Vol.90 (11), Article 111901
Hauptverfasser: Son, Hyeon-Dong, Kim, Hyun-Chul
Format: Artikel
Sprache:eng
Schlagworte:
Broken symmetry
Cosmology
Gravitation
Mathematical analysis
Operators
Pions
Quark models
Stability
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Zusammenfassung:We investigate the pressure of the pion, which should be equal to zero to ensure the stability of the pion, within the framework of the chiral quark model beyond the chiral limit. The pressure of the pion vanishes nontrivially by the Gell-Mann-Oakes-Renner relation within the present framework. This implies that the stability of the pion might be deeply rooted in spontaneous chiral symmetry breaking. We also discuss physical quantities relevant to the energy-momentum tensor operator.
ISSN:1550-7998
1550-2368
DOI:10.1103/PhysRevD.90.111901