Upper limits on the diffuse supernova neutrino flux from the SuperKamiokande data
Abstract
We analyze the 1496 days of SuperKamiokande data to put limits on the nue, anti-nue, numu + nutau and anti-numu + anti-nutau components of the diffuse flux of supernova neutrinos, in different energy intervals and for different neutrino energy spectra. By considering the presence of only one component at a time, we find the following bounds at 90% C.L. and for neutrino energy E>19.3$ MeV: Phinue<73.3-154 cm-2 s-1, Phianti-nue <1.4-1.9 cm-2 s-1, Phinumu+nutau <(1.0-1.4) 103 cm-2 s-1, and Phianti-numu+ anti-nutau <(1.3-1.8) 103 cm-2 s-1, where the intervals account for varying the neutrino spectrum. In the interval E = 22.9 - 36.9 MeV, we find Phinue<39-54 cm-2 s-1, which improves on the existing limit from SNO in the same energy window. Our results for numu + nutau and anti-numu + anti-nutau improve by about four orders of magnitude over the previous best constraints from LSD.
Turn this paper into a lesson
ArcXiv compiles a structured reading guide from this paper's metadata: plain-English importance, contributions, prerequisite concepts, which sections to read first, flashcards, and a quiz. Grounded in the abstract, never invented.