Supernova Relic Neutrino search with neutron tagging at Super-Kamiokande-IV

H Zhang,L Labarga,M Sakuda,T Tomura,K Nishijima,T Ishizuka,T Mori,T Akiri,T Nakaya,P Mijakowski,P Deperio,T Yokozawa,H Kikawa,E Kearns,R Yamaguchi,M Dziomba,S Matsuno,M Koshiba,G Mitsuka,T Kobayashi,K Kaneyuki,K Suzuki,Y Choi,A Minamino,S Moriyama,K Huang,H Sui,Y Kishimoto,Ll Marti,K Choi,Y Takeuchi,M Nakahata,H Sekiya,J Imber,K Iyogi,T Nakadaira,T Wongjirad,Y Koshio,Y Fukuda,M Miura,K Martens,J Kameda,K Ieki,G Carminati,S Mine,C Yanagisawa,K Connolly,K Bays,J.Y Kim,K Sakashita,Y Takenaga,S Nakayama,S.B Kim,Y Hayato,M Yokoyama,T Kajita,T Hasegawa,J Hill,J Hignight,T Ishii,Y Nakano,Y Kuno,H Okazawa,A Kibayashi,Y Itow,M Ikeda,T Yano,K Ueno,S Tobayama,Y Oyama,K Okumura,T Tsukamoto,M Shiozawa,Y Totsuka,Y Nishimura,Z Yang,Y Suzuki,K Abe,K.P Lee,K Scholberg,S Tasaka,T Sekiguchi,H Ishino,K Nishikawa,S Chen,A Renshaw,A Konaka,S Barkman,R Tacik,M Goldhaber,Hiroshi Kaji ,W E Keig ,Yang Zhang ,C K Jung ,Atsushi Takeda ,Ian Taylor ,R Wendell ,A Suzuki ,W R Kropp ,Toru Ishida ,M J Wilking ,T C Mclachlan ,J G Learned ,J F Martin ,L Sulak ,S N Smith ,James L Stone ,K S Ganezer ,M B Smy ,Kenzo Nakamura ,I T Lim ,H W Sobel ,J S Jang ,Akira Murakami ,C W Walter ,Takayuki Tanaka ,J L Raaf ,Sentaro Takahashi ,M R Vagins ,R J Wilkes

doi:10.1016/j.astropartphys.2014.05.004

Supernova Relic Neutrino search with neutron tagging at Super-Kamiokande-IV

H Zhang, L Labarga + Show 118 more

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https://doi.org/10.1016/j.astropartphys.2014.05.004

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Journal: Astroparticle Physics	Publication Date: Jun 5, 2014
Citations: 104

Affiliation: Tsinghua University, The University of Tokyo, Kavli Institute for the Physics and Mathematics of the Universe, Kyoto University, Stony Brook University, Okayama University, TRIUMF

#Supernova Relic Neutrino #Neutron Tagging + Show 6 more

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Abstract

A search for Supernova Relic Neutrinos ν¯e’s is first conducted via inverse-beta-decay by tagging neutron capture on hydrogen at Super-Kamiokande-IV. The neutron tagging efficiency is determined to be (17.74±0.04stat.±1.05sys.)%, while the corresponding accidental background probability is (1.06±0.01stat.±0.18sys.)%. Using 960days of data, we obtain 13 inverse-beta-decay candidates in the range of Eν¯e between 13.3MeV and 31.3MeV. All of the observed candidates are attributed to background. Upper limits at 90% C.L. are calculated in the absence of a signal.

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