- Accepted Paper
Bayesian inference of the Landau parameter from joint Gamow-Teller measurements
Phys. Rev. Lett. - Accepted 2 November, 2026
DOI: https://doi.org/10.1103/kn6h-dkxb
Phys. Rev. Lett. - Accepted 2 November, 2026
DOI: https://doi.org/10.1103/kn6h-dkxb
is the leading-order Landau-Migdal parameter that characterizes the spin-isospin dependent nucleon-nucleon interaction. Consequently, the is closely related to the Gamow-Teller resonance (GTR), the beta and double-beta decay rates of finite nuclei, the response of hot and dense nucleonic matter that modifies the neutrino-nucleon absorption rates in core-collapse supernovae (CCSNe) and binary neutron star (BNS) mergers, and finally the critical density for pion condensation in neutron stars. In this letter, for the first time, we report the with quantified uncertainty in the framework of Bayesian inference, using a self-consistent standard Skyrme Random Phase Approximation (RPA) model and joint constraints from experimental GTR measurements on , , . Our extracted at saturation density is , which is close to the prediction of a few existing Skyrme models that consider spin-isospin observables but smaller than the traditional ones extracted from pion-exchange models. The reasons for this deviation, like the value of the nucleon effective mass and the density dependence of , are investigated. The density-dependent values extracted in this work may guide the construction of new energy density functionals that aims to self-consistently describe the dense matter properties in the spin-isospin channel.
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