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The correlation between the charge radii differences in mirror nuclei pairsand the neutron skin thickness has been studied with the so-called finite rangesimple effective interaction over a wide mass region. The so far preciselymeasured charge radii difference data within their experimental uncertaintyranges in the 34Ar-34S, 36Ca-36S, 38Ca-38Ar, and 54Ni-54Fe mirror pairs areused to ascertain an upper limit for the slope parameter of the nuclearsymmetry energy L $\approx$ 100 MeV. This limiting value of L is found to beconsistent with the upper bound of the NICER PSR J0740+6620 constraint at1$\sigma$ level for the radius R$_{1.4}$ of 1.4 M$_\odot$ neutron stars. Thelower bound of the NICER R$_{1.4}$ data constrains the lower limit of L to$\approx$ 70 MeV. Within the range for L = 70-100 MeV the tidal deformability$\Lambda^{1.4}$ constraint, which is extracted from the GW170817 event at2$\sigma$ level, and the recent PREX-2 and CREX data on the neutron skinthickness are discussed.

Correlations between charge radii differences of mirror nuclei and stellar observables