Qin Juehang (Rice University)

First Indication of Solar 8B Neutrinos with XENONnT

Abstract: The dark matter direct detection experiment, XENONnT, uses a dual-phase xenon time projection chamber designed to be sensitive to dark matter in the form of weakly-interacting massive particles. These dark matter interactions can have a similar signature to B-8 solar neutrinos that undergo coherent elastic neutrino-nuclear scattering, making the experiment sensitive to these neutrino interactions. In this talk, I will present the recent XENONnT result where a measurement of B-8 solar neutrinos was made with a significance of 2.73 σ using a blind analysis. This result represents the first detection of elastic nuclear recoils from astrophysical neutrinos and the first measurement of coherent elastic neutrino-nuclear scattering using a xenon target. I will also discuss the expected significance of measurements with more exposure from the XENONnT experiment, and implications of this result and future measurements.