dorsal/arxiv
View SchemaA new Perspective on the Scalar meson Puzzle, from Spontaneous Chiral Symmetry Breaking Beyond BCS
| Authors | Pedro Bicudo |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9802058 |
| URL | https://arxiv.org/abs/nucl-th/9802058 |
| DOI | 10.1103/PhysRevC.60.035209 |
| Journal | Phys.Rev.C60:035209,1999 |
Abstract
We introduce coupled channels of Bethe-Salpeter mesons both in the boundstate equation for mesons and in the mass gap equation for chiral symmetry. Consistency is insured by the Ward Identities for axial currents, which preserve the Goldstone boson nature of the pion and prevents a systematic shift of the hadron spectrum. We study the decay of a scalar meson coupled to a pair of pseudoscalars. We also show that coupled channels reduce the breaking of chiral symmetry, with the same Feynman diagrams that appear in the coupling of a scalar meson to a pair of pseudoscalar mesons. Exact calculations are performed in a particular confining quark model, where we find that the groundstate $I=0, ^3P_0 q \bar q$ meson is the f_0(980) with a partial decay width of 40MeV. We also find a 30% reduction of the chiral condensate due to coupled channels.
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"abstract": "We introduce coupled channels of Bethe-Salpeter mesons both in the boundstate\nequation for mesons and in the mass gap equation for chiral symmetry.\nConsistency is insured by the Ward Identities for axial currents, which\npreserve the Goldstone boson nature of the pion and prevents a systematic shift\nof the hadron spectrum. We study the decay of a scalar meson coupled to a pair\nof pseudoscalars. We also show that coupled channels reduce the breaking of\nchiral symmetry, with the same Feynman diagrams that appear in the coupling of\na scalar meson to a pair of pseudoscalar mesons. Exact calculations are\nperformed in a particular confining quark model, where we find that the\ngroundstate $I=0, ^3P_0 q \\bar q$ meson is the f_0(980) with a partial decay\nwidth of 40MeV. We also find a 30% reduction of the chiral condensate due to\ncoupled channels.",
"arxiv_id": "nucl-th/9802058",
"authors": [
"Pedro Bicudo"
],
"categories": [
"nucl-th",
"cond-mat",
"hep-ph"
],
"doi": "10.1103/PhysRevC.60.035209",
"journal_ref": "Phys.Rev.C60:035209,1999",
"title": "A new Perspective on the Scalar meson Puzzle, from Spontaneous Chiral Symmetry Breaking Beyond BCS",
"url": "https://arxiv.org/abs/nucl-th/9802058"
},
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