dorsal/arxiv
View SchemaCollective modes and current-algebraic sum rules in nuclear medium
| Authors | Wojciech Broniowski, Brigitte Hiller |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9807086 |
| URL | https://arxiv.org/abs/nucl-th/9807086 |
| DOI | 10.1016/S0375-9474(98)00544-2 |
| Journal | Nucl.Phys. A643 (1998) 161-188 |
Abstract
In-medium sum rules following from the chiral charge algebra of QCD are reviewed, and new sum rules are derived. The new sum rules relate the I^G(J^{PC})=1^-(0^{++}) excitations (quantum numbers of a_0(980)) to the scalar and isovector densities, and are nontrivial for the isospin-asymmetric medium. We present an extensive illustration of the sum rules with help of quark matter in the Nambu-Jona--Lasinio model. Collective excitations different from the usual meson branches (spin-isospin sound modes) are shown to contribute significantly to the sum rules and to play a crucial role in the limit of vanishing current quark masses.
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"abstract": "In-medium sum rules following from the chiral charge algebra of QCD are\nreviewed, and new sum rules are derived. The new sum rules relate the\nI^G(J^{PC})=1^-(0^{++}) excitations (quantum numbers of a_0(980)) to the scalar\nand isovector densities, and are nontrivial for the isospin-asymmetric medium.\nWe present an extensive illustration of the sum rules with help of quark matter\nin the Nambu-Jona--Lasinio model. Collective excitations different from the\nusual meson branches (spin-isospin sound modes) are shown to contribute\nsignificantly to the sum rules and to play a crucial role in the limit of\nvanishing current quark masses.",
"arxiv_id": "nucl-th/9807086",
"authors": [
"Wojciech Broniowski",
"Brigitte Hiller"
],
"categories": [
"nucl-th",
"hep-ph"
],
"doi": "10.1016/S0375-9474(98)00544-2",
"journal_ref": "Nucl.Phys. A643 (1998) 161-188",
"title": "Collective modes and current-algebraic sum rules in nuclear medium",
"url": "https://arxiv.org/abs/nucl-th/9807086"
},
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