English

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

High Energy Astrophysical Phenomena 2023-03-27 v1 High Energy Physics - Phenomenology

Abstract

Recently an improved value of neutron skin thickness of 208Pb^{208}\text{Pb} was reported in Lead Radius EXperiment-2 (PREX-2) to be Rskin=RnRp=(0.283±0.071)R_{\text{skin}}=R_n - R_p=(0.283\pm 0.071) fm which corresponds to high estimations of nuclear symmetry energy (EsymE_{\text{sym}}) and its slope (LsymL_{\text{sym}}). The updated values of EsymE_{\text{sym}} and LsymL_{\text{sym}} commensurating to the neutron star observable estimations lie exterior to the astrophysical observed range. The higher values of LsymL_{\text{sym}} at n0n_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 Λ~\tilde{\Lambda} creating a tension between the terrestrial and astrophysical observations. In this study, we exploit this tension to constrain the Δ\Delta-scalar meson coupling parameter space.

Keywords

Cite

@article{arxiv.2302.07726,
  title  = {Tension between implications from PREX-2 data and gravitational tidal response on dense matter equation of state},
  author = {Vivek Baruah Thapa and Monika Sinha},
  journal= {arXiv preprint arXiv:2302.07726},
  year   = {2023}
}

Comments

6 pages, 3 figures. Conference proceeding of the "Nuclear Physics in Astrophysics-X 2022". To appear in EPJ Web of Conferences