Nuclear matter within a dilatation-invariant parity doublet model: The role of the tetraquark at nonzero density
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....
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| Autori principali: | , , |
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| Natura: | Article (Journal) |
| Lingua: | inglese |
| Pubblicazione: |
19 September 2011
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| In: |
Nuclear physics. A, Nuclear and hadronic physics
Year: 2011, Volume: 872, Fascicolo: 1, Pages: 13-24 |
| ISSN: | 1873-1554 |
| DOI: | 10.1016/j.nuclphysa.2011.09.008 |
| Accesso online: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.nuclphysa.2011.09.008 Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0375947411006117 
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| Note sull'autore: | Susanna Gallas, Francesco Giacosa, Giuseppe Pagliara |
| Riassunto: | 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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| Descrizione del documento: | Gesehen am 13.07.2023 |
| Descrizione fisica: | Online Resource |
| ISSN: | 1873-1554 |
| DOI: | 10.1016/j.nuclphysa.2011.09.008 |