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Nuclear matter within a dilatation-invariant parity doublet model: the role of the tetraquark at nonzero density

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arxiv 1105.5003 v1 pith:RYCD26KU submitted 2011-05-25 hep-ph nucl-th

Susanna Gallas , Francesco Giacosa , Giuseppe Pagliara This is my paper · ORCID
classification hep-phnucl-th
keywords tetraquarkdensitymodelscalarchiralcondensatedilatation-invariantdoublet
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We investigate the role of a scalar tetraquark state for the description of nuclear matter within the parity doublet model in the mirror assignment. In the dilatation-invariant version of the model a nucleon-nucleon interaction term mediated by the lightest scalar tetraquark field naturally emerges. At nonzero density one has, beyond the usual chiral condensate, also a tetraquark condensate. The behavior of both condensates and the restoration of chiral symmetry at high density are studied. It is shown that this additional scalar degree of freedom affects non negligibly the properties of the medium.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Comprehensive study of mass modifications of light mesons in nuclear matter in the three-flavor extended Linear Sigma Model

    nucl-th 2019-08 conditional novelty 6.0 of 10

    Combining the extended Linear Sigma Model with a parity doublet nucleon model, this paper predicts that most light meson masses drop in nuclear matter and favors a chiral invariant mass M0 around 0.8 GeV.

  2. Origin of nucleon mass in the light of PSR J0614-3329 with quark-hadron crossover

    nucl-th 2025-09 conditional novelty 5.0 of 10

    The parity doublet model combined with the new NICER radius measurement restricts the chiral invariant nucleon mass m0 to 800-860 MeV, implying it is at least 85% of the nucleon mass.

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