In-medium eta N interactions and eta nuclear bound states

0433667 - ÚJF 2015 RIV NL eng J - Článek v odborném periodiku
Cieplý, Aleš - Friedman, E. - Gal, A. - Mareš, Jiří
In-medium eta N interactions and eta nuclear bound states.
Nuclear Physics. A. Roč. 925, MAY (2014), s. 126-140. ISSN 0375-9474. E-ISSN 1873-1554
Grant CEP: GA ČR(CZ) GAP203/12/2126; GA MŠMT LG14038
Institucionální podpora: RVO:61389005
Klíčová slova: N(star) (1535 resonance * meson-baryon interactions * mesons in nuclear matter * mesic nuclei
Kód oboru RIV: BE - Teoretická fyzika
Impakt faktor: 2.202, rok: 2014

The in-medium eta N interaction near and below threshold is constructed from a free-space chirally-inspired meson-baryon coupled-channel model that captures the physics of the N* (1535) baryon resonance. Nucleon Pauli blocking and hadron self-energies are accounted for. The resulting energy-dependent in-medium interaction is used in self-consistent dynamical calculations of eta nuclear bound states. Narrow states of width Gamma eta less than or similar to 2 MeV are found across the periodic table, beginning with A >= 10, for this in-medium coupled-channel interaction model. The binding energy of the 1477 state increases with A, reaching a value of B-1s (eta) approximate to 15 MeV. The implications of our self-consistency procedure are discussed with respect to procedures used in other works.
Trvalý link: http://hdl.handle.net/11104/0237891