Speaker
Description
The observation of neutrinos from SN1987A had improved our understanding of
the mechanism of the supernova explosion and neutrino properties. Now, several state-of-the-art neutrino detectors are running. There is a chance to reveal the explosion mechanism and neutrino properties in more details. In this study, we search for neutrino events from supernovae with KamLAND, which is a 1kt liquid scintillator detector, via inverse-beta decay reaction. KamLAND can measure low energy events ($E_{\nu}>1.8$MeV) with low background conditions from delayed-coincidence scheme and have long-term stable data from 2002, including an unexplored dataset by other neutrino detectors (Dec. 2013 ~ Jul. 2020). Selection criteria for supernova events are two or more inverse beta decays within 10 s. We present the search results and upper limits on supernova rate in our galaxy.
