Atmospheric neutrino oscillation analysis with improved event reconstruction in Super-Kamiokande IV

M Jiang,K Abe,C Bronner,Y Hayato,M Ikeda,K Iyogi,J Kameda,Y Kato,Y Kishimoto, L l Marti,M Miura,S Moriyama,T Mochizuki,M Nakahata,Y Nakajima,Y Nakano,S Nakayama,T Okada,K Okamoto,A Orii,G Pronost,H Sekiya,M Shiozawa,Y Sonoda,A Takeda,A Takenaka,H Tanaka,T Yano,R Akutsu,T Kajita,Y Nishimura,K Okumura,R Wang,J Xia,L Labarga,P Fernandez,F d M Blaszczyk,C Kachulis,E Kearns,J L Raaf,J L Stone,S Sussman,S Berkman,J Bian,N J Griskevich,W R Kropp,S Locke,S Mine,P Weatherly,M B Smy,H W Sobel,V Takhistov,K S Ganezer,J Hill, J Y Kim,I T Lim,R G Park,B Bodur,K Scholberg,C W Walter,M Gonin,J Imber,Th A Mueller,T Ishizuka,T Nakamura,J S Jang,K Choi,J G Learned,S Matsuno,R P Litchfield,Y Uchida,M O Wascko,N F Calabria,M G Catanesi,R A Intonti,E Radicioni,G De Rosa,A Ali,G Collazuol,F Iacob,L Ludovici,S Cao,M Friend,T Hasegawa,T Ishida,T Kobayashi,T Nakadaira,K Nakamura,Y Oyama,K Sakashita,T Sekiguchi,T Tsukamoto,K E Abe,M Hasegawa,Y Isobe,H Miyabe,T Sugimoto,A T Suzuki,Y Takeuchi,Y Ashida,T Hayashino,S Hirota,T Kikawa,M Mori,K E Nakamura,T Nakaya,R A Wendell,L H V Anthony,N McCauley,A Pritchard,K M Tsui,Y Fukuda,Y Itow,M Murrase,P Mijakowski,K Frankiewicz,C K Jung,X Li,J L Palomino,G Santucci,C Vilela,M J Wilking,C Yanagisawa,D Fukuda,K Hagiwara,H Ishino,S Ito,Y Koshio,M Sakuda,Y Takahira,C Xu,Y Kuno,C Simpson,D Wark,F Di Lodovico,B Richards,S Molina Sedgwick,R Tacik, S B Kim,M Thiesse,L Thompson,H Okazawa,Y Choi,K Nishijima,M Koshiba,M Yokoyama,A Goldsack,K Martens,M Murdoch,B Quilain,Y Suzuki,M R Vagins,M Kuze,Y Okajima,T Yoshida,M Ishitsuka,J F Martin,C M Nantais,H A Tanaka,T Towstego,M Hartz,A Konaka,P de Perio,S Chen,L Wan,A Minamino

Progress of Theoretical and Experimental Physics（2019）

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摘要

A new event reconstruction algorithm based on a maximum likelihood method has been developed for Super-Kamiokande. Its improved kinematic and particle identification capabilities enable the analysis of atmospheric neutrino data in a detector volume 32% larger than previous analyses and increase the sensitivity to the neutrino mass hierarchy. Analysis of a 253.9 kton|$\\cdot$|year exposure of the Super-Kamiokande IV atmospheric neutrino data has yielded a weak preference for the normal hierarchy, disfavoring the inverted hierarchy at 74% assuming oscillations at the best fit of the analysis.

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