Please use this identifier to cite or link to this item: https://hdl.handle.net/10316/4563
Title: Collective modes and current-algebraic sum rules in nuclear medium
Authors: Broniowski, Wojciech 
Hiller, Brigitte 
Keywords: Meson properties in nuclear medium; Current algebra; Sum rules
Issue Date: 1998
Citation: Nuclear Physics A. 643:2 (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 excitations (quantum numbers of a0(980)) to the scalar and isovector densities, and are non-trivial for the isospin-asymmetric medium. We present an extensive illustration of the sum rules with the 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.
URI: https://hdl.handle.net/10316/4563
DOI: 10.1016/S0375-9474(98)00544-2
Rights: openAccess
Appears in Collections:FCTUC Física - Artigos em Revistas Internacionais

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