Abstract
We calculate the supernova relic neutrino (SRN) background flux for the KamLAND and Super-Kamiokande (Super-K) detectors, motivated by the reduction in background at Super-Kand new results for the star formation history (e.g., from theSloan digital sky survey (SDSS)). Our best estimate for theflux at Super-K is slightly below, but very close to, the current Super-K upper limit. The Super-K upper limit isalready inconsistent with a range of star formation historiesallowed by the SDSS data. We estimate that the SRN backgroundshould be detected (at 1σ) at Super-K in a total ofabout 9 years (including the existing 4 years) of data. WhileKamLAND is a much smaller detector compared to Super-K, itprofits from being practically background free and from its sensitivity to the lower energy supernova neutrinos.KamLAND could make a 1σ detection of the SRNs with atotal of about 5 years of data. Given the small expected SRNevent rate, we also consider the detection of the SRNs in amodified Super-K detector with a lower threshold and reducedbackground where the time to detection can be reduced by afactor of ten relative to the existing Super-K estimate.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
