Search for exotic interactions of solar neutrinos in the CDEX-10 experiment

Abstract

We investigate exotic neutrino interactions using the 205.4−kg·day dataset from the CDEX-10 experiment at the China Jinping Underground Laboratory. New constraints on the mass and couplings of new gauge bosons are presented. Two nonstandard neutrino interactions are considered: a U(1)B–L gauge-boson-induced interaction between an active neutrino and electron/nucleus, and a dark-photon-induced interaction between a sterile neutrino and electron/nucleus via kinetic mixing with a photon. This work probes an unexplored parameter space involving sterile neutrino coupling with a dark photon. New laboratory limits are derived on dark photon masses below 1 eV/c2 at some benchmark values of Δm412 and g′2sin22θ14.Received 21 October 2022Revised 22 November 2022Accepted 17 May 2023DOI:https://doi.org/10.1103/PhysRevD.107.112002Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.Published by the American Physical SocietyPhysics Subject Headings (PhySH)Research AreasExtensions of gauge sectorParticle astrophysicsParticle interactionsParticle mixing & oscillationsSolar neutrinosPhysical SystemsHypothetical gauge bosonsNeutrinosSterile neutrinosTechniquesDark matter detectorsNeutrino detectorsSolid-state detectorsParticles & FieldsGravitation, Cosmology & Astrophysics