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June 22, 2020 to July 2, 2020
US/Central timezone

Study of the atmospheric neutrino background for Supernova Relic Neutrino search

Not scheduled
10m

Speaker

Mr Seiya Sakai (Okayama University)

Description

Neutrinos which were emitted from all past core-collapse supernovae form the integrated flux, called supernova relic neutrinos (SRNs). Detecting SRNs would enable us to study the supernova mechanism as well as the star formation history; however, they have never been discovered even in the most sensitive searches at Super-Kamiokande (SK). SK is a 50 kton water Cherenkov detector and has a plan to dissolve gadolinium to enhance the sensitivity to SRNs, which is termed the SK-Gd phase.

In the SRN search, atmospheric neutrino interactions are one of the serious backgrounds and currently the largest uncertainty comes from de-excitation gamma-rays emitted from neutron-oxygen reactions. In this poster, I compared the number of gamma-rays emitted from neutron-oxygen reactions, neutron multiplicity and neutron energy distribution by using various neutron models installed in GEANT4-based simulation.

Mini-abstract

We compared neutron models by using GEANT4-based simulation for Supernova Relic Neutrino search.

Experiment/Collaboration Super-Kamiokande

Primary author

Mr Seiya Sakai (Okayama University)

Presentation Materials