Measuring Solar neutrino Fluxes in Direct Detection Experiments in the Presence of Light Mediators

TL;DR

This paper explores how dark matter direct detection experiments can measure solar neutrino fluxes and constrain light mediators, highlighting potential sensitivities and challenges in achieving precise measurements.

Contribution

It demonstrates the potential of direct detection experiments to measure solar neutrino fluxes with high precision and to set constraints on light mediators, considering the impact of backgrounds and systematic uncertainties.

Findings

Sensitivity to $^8$B and pp neutrino fluxes can reach ±10% with improved backgrounds.

Exposure increases can improve sensitivity to ±3%.

Constraints on light mediators can reach the order of 10^{-6} for sub-10 MeV masses.

Abstract

The potential of the dark matter direct detection experiments to provide independent measurements on solar neutrino fluxes in the Standard Model and in the presence of the light mediators is studied in this work. We also present the sensitivity of direct detection experiments on light mediators with solar neutrinos. We find that the sensitivities on $^8$B and pp neutrino fluxes can reach $\pm10\%$ with improved backgrounds and systematic uncertainties and they can be further pushed to $\pm3\%$ with a increased exposure. The constraints on light mediators can reach $\mathcal{O}(10^{-6})$ for the masses of scalar and vector mediators below 10 MeV. However, the presence of scalar or vector mediators could lead to shifts in the best fit value of $^8$B fluxes, which will increase the challenges in the precise measurements of solar neutrino fluxes with direct detection experiments.