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We try to constraints some of the nuclear matter parameters such as symmetryenergy ($J$) and its slope ($L$) from the recent inferred data of the PREX-2.Other nuclear matter parameters are adopted from {\bf [Phys. Rev. C 85 035201(2012), Phys. Rev. C 90 055203 (2014)]} papers and the linear correlation amongthem are checked by using the Pearson's formula. We find the correlationbetween $J-L$, $K_\tau-J$ and $K_\tau-L$ with coefficients 0.85, 0.81 and 0.76respectively. The neutron star properties such as mass and radius arecalculated with 50 unified equation of states. The results are consistent withrecently observed pulsars and NICER data except few exceptions. From the radiiconstraints, we find that the new NICER data allows a narrow radius rangecontrary to a large range of PREX-2 and the old NICER data leaving us aninconclusive determination of the neutron star radius.

Constraining nuclear matter parameters and neutron star observables using PREX-2 and NICER data