Supernova Relic Neutrino Search at Super-Kamiokande
The Super-Kamiokande Collaboration: K. Bays, T. Iida, K. Abe, Y., Hayato, K. Iyogi, J. Kameda, Y. Koshio, L. Marti, M. Miura, S. Moriyama, M., Nakahata, S. Nakayama, Y. Obayashi, H. Sekiya, M. Shiozawa, Y. Suzuki, A., Takeda, Y. Takenaga, K. Ueno
TL;DR
This paper reports an improved search for supernova relic neutrinos using 2853 days of Super-Kamiokande data, setting new upper limits on neutrino flux that challenge existing theoretical models.
Contribution
It introduces a more sensitive analysis with increased efficiency, lower energy threshold, and expanded data, significantly improving flux limits over previous results.
Findings
New upper limits on SRN flux between 2.8 and 3.0 nu_e cm^-2 s^-1 > 16 MeV
Enhanced sensitivity compared to 2003 results
Constraints on theoretical SRN flux predictions
Abstract
A new Super-Kamiokande (SK) search for Supernova Relic Neutrinos (SRNs) was conducted using 2853 live days of data. Sensitivity is now greatly improved compared to the 2003 SK result, which placed a flux limit near many theoretical predictions. This more detailed analysis includes a variety of improvements such as increased efficiency, a lower energy threshold, and an expanded data set. New combined upper limits on SRN flux are between 2.8 and 3.0 nu_e cm^-2 s^-1 > 16 MeV total positron energy (17.3 MeV E_nu).
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.