Upper limits on the diffuse supernovaneutrino flux from theSuperKamiokande data

Cecilia Lunardini, Orlando L G Peres

Research output: Contribution to journalArticle

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Abstract

We analyze the 1496 days of SuperKamiokande data to put limits on the νe, νμτ and 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% CL and for neutrino energy E>19.3MeV: Φνe<73.3-154cm-2s -1, Φνμτ<(1.0-1.4) × 103cm-2s-1 and , where the intervals account for varying the neutrino spectrum. In the interval E = 22.9-36.9MeV, we find Φνe<39-54cm-2s-1, which improves on the existing limit from SNO in the same energy window. Our results for νμτ and improve by about four orders of magnitude the previous best constraints from LSD.

Original languageEnglish (US)
Article number033
JournalJournal of Cosmology and Astroparticle Physics
Volume2008
Issue number8
DOIs
StatePublished - Aug 1 2008

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Keywords

  • Neutrino experiments
  • Neutrino properties
  • Star formation
  • Supernova neutrinos

ASJC Scopus subject areas

  • Astronomy and Astrophysics

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