Towards probing the diffuse supernova neutrino background in all flavors
Abstract
Fully understanding the average core-collapse supernova requires detecting the diffuse supernova neutrino background (DSNB) in all flavors. While the DSNB ν¯ e flux is near detection, and the DSNB νe flux has a good upper limit and prospects for improvement, the DSNB νx (each of νμ , ντ , ν¯ μ , ν¯ τ ) flux has a poor limit and heretofore had no clear path for improved sensitivity. We show that a succession of xenon-based dark matter detectors—XENON1T (completed), XENONnT/LUX-ZEPLIN (running), and DARWIN (proposed)—can dramatically improve sensitivity to DSNB νx the neutrino-nucleus coherent scattering channel. XENON1T could match the present sensitivity of ∼103 cm-2 s-1 per νx flavor, XENONnT/LUX-ZEPLIN would have linear improvement of sensitivity with exposure, and a long run of DARWIN could reach a flux sensitivity of ∼10 cm-2 s-1 . Together, these would also contribute to greatly improve bounds on nonstandard scenarios. Ultimately, to reach the standard flux range of ∼1 cm-2 s-1 , even larger exposures will be needed, which we show may be possible with the series of proposed lead-based RES-NOVA detectors.
- Publication:
-
Physical Review D
- Pub Date:
- February 2022
- DOI:
- 10.1103/PhysRevD.105.043008
- arXiv:
- arXiv:2112.09168
- Bibcode:
- 2022PhRvD.105d3008S
- Keywords:
-
- Astrophysics - High Energy Astrophysical Phenomena;
- High Energy Physics - Phenomenology
- E-Print:
- 13 pages, 11 figures, 3 appendices. Minor clarifications added, matches version accepted for publication in Phys. Rev. D