Stability of the pion and the pattern of chiral symmetry breaking

Abstract

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 turns out to vanish nontrivially by the Gell-Mann-Oakes-Renner relation within the present framework. It 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.

5 pages, 3 figures, To appear in Phys. Rev. D

References in corpus (4)

• Gravitational and higher-order form factors of the pion in chiral quark models
• Singular Charge Density at the Center of the Pion?
• Pion transverse charge density from timelike form factor data
• Electromagnetic form factors of the pion and kaon from the instanton vacuum

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