Background Study on Supernova Relic Neutrinos Search in SuperK-Gd

TL;DR

This paper analyzes background sources for supernova relic neutrino detection in the SuperK-Gd experiment, aiming to improve future search sensitivity by understanding and modeling background events.

Contribution

It provides a detailed background study and event rate calculations for supernova relic neutrino searches in the SuperK-Gd project, which is novel for this specific experiment.

Findings

Estimated background event rates for various sources.

Predicted supernova relic neutrino signals under different models.

Guidelines for optimizing future neutrino detection sensitivity.

Abstract

The detection of supernova relic neutrinos could provide precious information on the evolution of the universe, the formation of stars, the mechanism of supernova bursts and the related neutrino physics. Many experiments, such as Kamland, Borexino, Sudbury Neutrino Observatory and Super-Kamiokande have conducted searches for the supernova relic neutrinos. However, no supernova relic neutrino signal has been observed until now. This paper reports the background study on the supernova relic neutrinos search for the future neutrino experiment in SuperK-Gd project. The expected event rate for various background sources and supernova relic neutrino models are calculated, respectively.