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Unveiling the correlations of tidal deformability with the nuclear symmetry energy parameters

Authors: Malik, T; Agrawal, BK; Providencia, C; De, JN

Ref.: Phys. Rev. C 102(5), 052801 (2020)

Abstract: The importance of the constraints imposed by finite nuclei properties in unveiling the correlations of the tidal deformability with the symmetry energy parameters is investigated within the χ2-based covariance approach (CCA). The Hessian matrix, a quantity central to the CCA, contains implicitly in-built knowledge of the distributions of the nuclear matter parameters (NMPs) consistent with the fit data. Using an extensive set of fit data on finite nuclei together with the maximum mass of neutron stars in the CCA, the correlation of the tidal deformability of a neutron star with the slope and the curvature parameters of the nuclear symmetry energy is studied. Comparing these results with those obtained from completely uncorrelated distributions of NMPs, but filtered by high-density constraints coming from observations, it is shown that the additional constraints on the NMPs induced by the finite nuclei properties are instrumental in strengthening the correlations of the tidal deformability with the symmetry energy parameters.

DOI: 10.1103/PhysRevC.102.052801

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