XENONnT Experiment Data Refines Neutrino Mass Splitting Constraints

A new analysis from the XENONnT experiment utilized low-energy solar neutrino data to constrain the ultra-small pseudo-Dirac mass-squared splitting of the first neutrino mass eigenstate. This preprint study explores how such a splitting could cause active-sterile oscillations over the Sun-Earth distance, offering new insights into fundamental neutrino properties.