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Nuclear Theory·nucl-th

Monday·June 20, 2016

4 papers—2 primary·2 cross-listed

All4Primary2Cross-lists2
  1. 03

    Excited Scalar Mesons and the Search for Glueballs

    Denis Parganlija (Vienna UT)🇦🇹 · Francesco Giacosa (Kielce U)🇵🇱

    We discuss the importance of mixing between glueballs -- bound states of gluons -- and excited states for the glueball search. A preliminary study of the excited states in the Extended Linear Sigma Model (eLSM) suggests their masses in the scalar channel to be in the vicinity of the scalar-glueball mass found in Lattice QCD. This could have implications for future glueball searches.

    ↳ hep-phnucl-thJPS Conf.Proc.(2017)·0 citations
  2. 04

    SU(2) low energy quark effective couplings in weak external magnetic field

    Fabio L. Braghin🇧🇷

    In this work corrections to the usual flavor SU(2) Nambu-Jona-Lasinio coupling due to a weak external magnetic field are calculated by considering quark polarization in a (dressed) gluon exchange mechanism for quark interactions. The quark field is splitted into two components, one that condenses and another one that is a background field for interacting quarks, being the former integrated out. The resulting determinant is expanded for relatively large quark mass and small magnetic field, by resolving magnetic field dependent low energy quark effective interactions. Besides the corrections for the NJL and vector NJL effective couplings, different dependent effective couplings that break isospin and chiral symmetry emerge.

    ↳ hep-phnucl-thPRD(2016)·12 citations

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first authorsco-authorsvia INSPIRE