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Hyperon puzzle and the RMF model with scaled hadron masses and coupling constants
Názov Hyperon puzzle and the RMF model with scaled hadron masses and coupling constants Aut.údaje E. E. Kolomeitsev, K. A. Maslov, D. N. Voskresensky Autor Kolomeitsev Evgeni E. 1970- (96%) UMBFP06 - Katedra fyziky
Spoluautori Maslov K. A. (2%)
Voskresensky Dmitri (2%)
Zdroj.dok. Journal of Physics: Conference Series. Vol. 668 (2016), pp. 1-6. - Bristol : IOP Publishing, 2016 ; SQM 2015 medzinárodná konferencia Kľúč.slová stavová rovnica relativistický model stredného poľa neutrónové hviezdy equation of state relativistic mean-field models neutron stars Jazyk dok. angličtina Krajina Veľká Británia Systematika 533 Anotácia The equation of state of cold baryonic matter is studied within a relativistic mean-field model with hadron masses and coupling constants depending on a scalar field. We demonstrate that if the effective nucleon mass stops to decrease with a density increase at densities n > n > n0, where n0 is the nuclear saturation density, the equation of state stiffens for these densities and the limiting neutron star mass increases. The stabilization of the nucleon mass can be realised if in the equation of motion for the scalar mean-field there appear a term sharply varying in a narrow vicinity of the field value corresponding to the density n . We show several possible realizations of this mechanism getting sufficiently stiff equations of state. The appearance of hyperons in dense neutron star interiors is accounted for. The obtained equations of state remain sufficiently stiff if the reduction of the ϕ meson mass is incorporated. Thereby, the hyperon puzzle can be resolved Kategória publikačnej činnosti AFC Číslo archívnej kópie 35029 Katal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Báza dát xpca - PUBLIKAČNÁ ČINNOSŤ Odkazy PERIODIKÁ-Súborný záznam periodika 
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