Tension between implications from PREX-2 data and gravitational tidal response on dense matter equation of state

Recently an improved value of neutron skin thickness of 208 Pb was reported in Lead Radius EXperiment-2 (PREX-2) to be R skin = R n R p = (0.283 0.071) fm which corresponds to high estimations of nuclear symmetry energy ( E sym ) and its slope ( L sym ). The updated values of E sym and L sym commens...

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Bibliographic Details
Published inEPJ Web of conferences Vol. 279; p. 10003
Main Authors Thapa, Vivek Baruah, Sinha, Monika
Format Journal Article
LanguageEnglish
Published EDP Sciences 2023
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Summary:Recently an improved value of neutron skin thickness of 208 Pb was reported in Lead Radius EXperiment-2 (PREX-2) to be R skin = R n R p = (0.283 0.071) fm which corresponds to high estimations of nuclear symmetry energy ( E sym ) and its slope ( L sym ). The updated values of E sym and L sym commensurating to the neutron star observable estimations lie exterior to the astrophysical observed range. The higher values of L sym at n 0 deduced from recent PREX-2 data correlates to matter being easily deformable (yielding higher radius values) around intermediate matter densities leading to higher values of Λ̃ creating a tension between the terrestrial and astrophysical observations. In this study, we exploit this tension to constrain the Δ-scalar meson coupling parameter space.
ISSN:2100-014X
2100-014X
DOI:10.1051/epjconf/202327910003