DUNE as the Next-Generation Solar Neutrino Experiment

Abstract

We show that the Deep Underground Neutrino Experiment (DUNE) has the potential to deliver world-leading results in solar neutrinos. Significant but realistic new efforts would be required. With an exposure of 100 kton-year, DUNE could detect 10 5 signal events above 5 MeV. Separate precision measurements of neutrino-mixing parameters and the 8 B flux could be made using two detection channels (νe + 40 Ar and νe,µ,τ + e − ) and the day-night effect (> 10σ). New particle physics may be revealed through the comparison of solar neutrinos (with matter effects) and reactor neutrinos (without), which is discrepant by ∼ 2σ (and could become 5.6σ). New astrophysics may be revealed through the most precise measurement of the 8 B flux (to 2.5%) and the first detection of the hep flux (to 11%). DUNE is required: No other experiment, even proposed, has been shown capable of fully realizing these discovery opportunities.12 θ 2 sin 0.2 0.3 0.4

Neutrino-nucleus cross sections for W -boson and trident production

“…These test neutrino couplings to hadrons and probe the internal structure of hadronic states [2][3][4][5][6][7][8]. Increasingly precise measurements of cross sections allow increasingly precise tests of neutrino mixing and beyond the Standard Model physics [9][10][11][12][13][14][15]. Understanding the cross section is also crucial to neutrino astrophysics [16][17][18][19][20][21][22][23][24][25].…”

Borexino and general neutrino interactions

“…One such project is the Jinping experiment [43]. In addition, future large scale dark matter direct detection experiments can provide precise solar neutrino measurements [44][45][46], ideas to use future long-baseline neutrino oscillation far detectors as solar neutrino experiments are also present [47].…”

A New Concept for Kilotonne Scale Liquid Argon Time Projection Chambers

“…Pixelated charge-readout would improve the energy estimation of beam neutrinos as high-angle particles would not be missed, and would improve the background detection efficiency, both of which are important for DUNE's long-baseline neutrino oscillation program. It would particularly improve the reconstruction of low energy events which have no preferred direction, such as proton decay and supernova-neutrino detection [20], which are key pillars of DUNE's physics program, and additionally, make the reconstruction of solar-neutrinos [37] more uniform as a function of zenith-angle, which benefit the study of angular dependent effects [21][22][23].…”