We study the prospects for measuring the low-energy components of the solar neutrino flux in future direct dark matter detection experiments. We show that for a depletion of 136Xe by a factor of 1000 relative to its natural abundance, and an extension to electron recoil energies of ∼MeV , future xenon experiments with exposure ∼1000 ton-yr can detect the carbon-nitrogen-oxygen (CNO) component of the solar neutrino flux at approximately three-sigma significance. A CNO detection will provide important insight into the metallicity of the solar interior. Precise measurement of low-energy solar neutrinos, including as pp , 7Be, and p e p components, will further improve constraints on the "neutrino luminosity" of the Sun, thereby providing constraints on alternative sources of energy production. We find that a measurement of Lν/L☉ of order 1% is possible with the above exposure, improving on current bounds from a global analysis of solar neutrino data by a factor of about 7.
Physical Review D
- Pub Date:
- February 2019
- Astrophysics - Solar and Stellar Astrophysics;
- High Energy Physics - Phenomenology;
- Physics - Instrumentation and Detectors
- 8 pages, 5 figures