Speaker
Description
On 1987 February 23rd, neutrinos from SN1987A were observed. This observation confirms that neutrinos have an important role in supernova explosions. In order to establish the detailed mechanisms of supernovae, further supernova neutrino signals have been searched for with a variety of detectors. The KamLAND, an anti-neutrino detector using a 1kt liquid scintillator, has significant sensitivity to supernova neutrinos owing to a low radioactivity environment, a large target volume, and a low energy threshold. We searched for supernova neutrino events using the KamLAND data taken from 2002 March 9th to 2020 July 17th. In this talk, we present the result of a search for supernova neutrinos via inverse beta decay reaction (IBD). Multiple IBDs within 10-s window are required as a supernova neutrino event. Assuming theoretical models, we discuss the supernova detectable range at the KamLAND. Constrains on the galactic star formation rate from the point of view of a neutrino observation is also discussed. We present the status of a search for supernova neutrinos via 12C neutral current, too.
| Collaboration | KamLAND collaboration |
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