Search for nucleon decay via n→ν[over ¯]π0 and p→ν[over ¯]π+ in Super-Kamiokande

K Abe; Y Hayato; T Iida; K Iyogi; J Kameda; Y Koshio; Y Kozuma; Ll Marti; M Miura; S Moriyama; M Nakahata; S Nakayama; Y Obayashi; H Sekiya; M Shiozawa; Y Suzuki; A Takeda; Y Takenaga; K Ueno; K Ueshima; S Yamada; T Yokozawa; C Ishihara; H Kaji; T Kajita; K Kaneyuki; K P Lee; T McLachlan; K Okumura; Y Shimizu; N Tanimoto; L Labarga; E Kearns; M Litos; J L Raaf; J L Stone; L R Sulak; M Goldhaber; K Bays; W R Kropp; S Mine; C Regis; A Renshaw; M B Smy; H W Sobel; K S Ganezer; J Hill; W E Keig; J S Jang; J Y Kim; I T Lim; J B Albert; K Scholberg; C W Walter; R Wendell; T M Wongjirad; T Ishizuka; S Tasaka; J G Learned; S Matsuno; S N Smith; T Hasegawa; T Ishida; T Ishii; T Kobayashi; T Nakadaira; K Nakamura; K Nishikawa; Y Oyama; K Sakashita; T Sekiguchi; T Tsukamoto; A T Suzuki; Y Takeuchi; M Ikeda; A Minamino; T Nakaya; Y Fukuda; Y Itow; G Mitsuka; T Tanaka; C K Jung; G D Lopez; I Taylor; C Yanagisawa; H Ishino; A Kibayashi; S Mino; T Mori; M Sakuda; H Toyota; Y Kuno; M Yoshida; S B Kim; B S Yang; H Okazawa; Y Choi; K Nishijima; M Koshiba; M Yokoyama; Y Totsuka; K Martens; J Schuemann; M R Vagins; S Chen; Y Heng; Z Yang; H Zhang; D Kielczewska; P Mijakowski; K Connolly; M Dziomba; E Thrane; R J Wilkes; Super-Kamiokande Collaboration

doi:10.1103/PhysRevLett.113.121802

Search for nucleon decay via n→ν[over ¯]π0 and p→ν[over ¯]π+ in Super-Kamiokande

Phys Rev Lett. 2014 Sep 19;113(12):121802. doi: 10.1103/PhysRevLett.113.121802. Epub 2014 Sep 19.

Authors

K Abe¹, Y Hayato¹, T Iida², K Iyogi², J Kameda¹, Y Koshio¹, Y Kozuma², Ll Marti², M Miura¹, S Moriyama¹, M Nakahata¹, S Nakayama¹, Y Obayashi¹, H Sekiya¹, M Shiozawa¹, Y Suzuki¹, A Takeda¹, Y Takenaga², K Ueno², K Ueshima², S Yamada², T Yokozawa², C Ishihara³, H Kaji³, T Kajita⁴, K Kaneyuki⁴, K P Lee³, T McLachlan³, K Okumura³, Y Shimizu³, N Tanimoto³, L Labarga⁵, E Kearns⁶, M Litos⁷, J L Raaf⁷, J L Stone⁶, L R Sulak⁷, M Goldhaber⁸, K Bays⁹, W R Kropp⁹, S Mine⁹, C Regis⁹, A Renshaw⁹, M B Smy¹⁰, H W Sobel¹⁰, K S Ganezer¹¹, J Hill¹¹, W E Keig¹¹, J S Jang¹², J Y Kim¹², I T Lim¹², J B Albert¹³, K Scholberg¹⁴, C W Walter¹⁴, R Wendell¹³, T M Wongjirad¹³, T Ishizuka¹⁵, S Tasaka¹⁶, J G Learned¹⁷, S Matsuno¹⁷, S N Smith¹⁷, T Hasegawa¹⁸, T Ishida¹⁸, T Ishii¹⁸, T Kobayashi¹⁸, T Nakadaira¹⁸, K Nakamura¹⁹, K Nishikawa¹⁸, Y Oyama¹⁸, K Sakashita¹⁸, T Sekiguchi¹⁸, T Tsukamoto¹⁸, A T Suzuki²⁰, Y Takeuchi²¹, M Ikeda²², A Minamino²², T Nakaya²³, Y Fukuda²⁴, Y Itow²⁵, G Mitsuka²⁶, T Tanaka²⁶, C K Jung²⁷, G D Lopez²⁷, I Taylor²⁷, C Yanagisawa²⁷, H Ishino²⁸, A Kibayashi²⁸, S Mino²⁸, T Mori²⁸, M Sakuda²⁸, H Toyota²⁸, Y Kuno²⁹, M Yoshida²⁹, S B Kim³⁰, B S Yang³⁰, H Okazawa³¹, Y Choi³², K Nishijima³³, M Koshiba³⁴, M Yokoyama³⁵, Y Totsuka³⁴, K Martens³⁶, J Schuemann³⁶, M R Vagins¹⁰, S Chen³⁷, Y Heng³⁷, Z Yang³⁷, H Zhang³⁷, D Kielczewska³⁸, P Mijakowski³⁸, K Connolly³⁹, M Dziomba³⁹, E Thrane³⁹, R J Wilkes³⁹; Super-Kamiokande Collaboration

Affiliations

¹ Kamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu 506-1205, Japan and Kavli Institute for the Physics and Mathematics of the Universe (WPI), Todai Institutes for Advanced Study, University of Tokyo, Kashiwa, Chiba 277-8583, Japan.
² Kamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu 506-1205, Japan.
³ Research Center for Cosmic Neutrinos, Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582, Japan.
⁴ Research Center for Cosmic Neutrinos, Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582, Japan and Kavli Institute for the Physics and Mathematics of the Universe (WPI), Todai Institutes for Advanced Study, University of Tokyo, Kashiwa, Chiba 277-8583, Japan.
⁵ Department of Theoretical Physics, University Autonoma Madrid, 28049 Madrid, Spain.
⁶ Department of Physics, Boston University, Boston, Massachusetts 02215, USA and Kavli Institute for the Physics and Mathematics of the Universe (WPI), Todai Institutes for Advanced Study, University of Tokyo, Kashiwa, Chiba 277-8583, Japan.
⁷ Department of Physics, Boston University, Boston, Massachusetts 02215, USA.
⁸ Physics Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
⁹ Department of Physics and Astronomy, University of California, Irvine, Irvine, California 92697-4575, USA.
¹⁰ Department of Physics and Astronomy, University of California, Irvine, Irvine, California 92697-4575, USA and Kavli Institute for the Physics and Mathematics of the Universe (WPI), Todai Institutes for Advanced Study, University of Tokyo, Kashiwa, Chiba 277-8583, Japan.
¹¹ Department of Physics, California State University, Dominguez Hills, Carson, California 90747, USA.
¹² Department of Physics, Chonnam National University, Kwangju 500-757, Korea.
¹³ Department of Physics, Duke University, Durham, North Carolina 27708, USA.
¹⁴ Department of Physics, Duke University, Durham, North Carolina 27708, USA and Kavli Institute for the Physics and Mathematics of the Universe (WPI), Todai Institutes for Advanced Study, University of Tokyo, Kashiwa, Chiba 277-8583, Japan.
¹⁵ Junior College, Fukuoka Institute of Technology, Fukuoka 811-0214, Japan.
¹⁶ Information and Multimedia Center, Gifu University, Gifu, Gifu 501-1193, Japan.
¹⁷ Department of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii 96822, USA.
¹⁸ High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan.
¹⁹ High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan and Kavli Institute for the Physics and Mathematics of the Universe (WPI), Todai Institutes for Advanced Study, University of Tokyo, Kashiwa, Chiba 277-8583, Japan.
²⁰ Department of Physics, Kobe University, Kobe, Hyogo 657-8501, Japan.
²¹ Department of Physics, Kobe University, Kobe, Hyogo 657-8501, Japan and Kavli Institute for the Physics and Mathematics of the Universe (WPI), Todai Institutes for Advanced Study, University of Tokyo, Kashiwa, Chiba 277-8583, Japan.
²² Department of Physics, Kyoto University, Kyoto, Kyoto 606-8502, Japan.
²³ Department of Physics, Kyoto University, Kyoto, Kyoto 606-8502, Japan and Kavli Institute for the Physics and Mathematics of the Universe (WPI), Todai Institutes for Advanced Study, University of Tokyo, Kashiwa, Chiba 277-8583, Japan.
²⁴ Department of Physics, Miyagi University of Education, Sendai, Miyagi 980-0845, Japan.
²⁵ Solar Terrestrial Environment Laboratory, Nagoya University, Nagoya, Aichi 464-8602, Japan and Kobayashi-Maskawa Institute for the Origin of Particles and the Universe, Nagoya University, Nagoya, Aichi 464-8602, Japan.
²⁶ Solar Terrestrial Environment Laboratory, Nagoya University, Nagoya, Aichi 464-8602, Japan.
²⁷ Department of Physics and Astronomy, State University of New York, Stony Brook, New York 11794-3800, USA.
²⁸ Department of Physics, Okayama University, Okayama, Okayama 700-8530, Japan.
²⁹ Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.
³⁰ Department of Physics, Seoul National University, Seoul 151-742, Korea.
³¹ Department of Informatics in Social Welfare, Shizuoka University of Welfare, Yaizu, Shizuoka, 425-8611, Japan.
³² Department of Physics, Sungkyunkwan University, Suwon 440-746, Korea.
³³ Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan.
³⁴ The University of Tokyo, Bunkyo, Tokyo 113-0033, Japan.
³⁵ The University of Tokyo, Bunkyo, Tokyo 113-0033, Japan and Kavli Institute for the Physics and Mathematics of the Universe (WPI), Todai Institutes for Advanced Study, University of Tokyo, Kashiwa, Chiba 277-8583, Japan.
³⁶ Kavli Institute for the Physics and Mathematics of the Universe (WPI), Todai Institutes for Advanced Study, University of Tokyo, Kashiwa, Chiba 277-8583, Japan.
³⁷ Department of Engineering Physics, Tsinghua University, Beijing 100084, China.
³⁸ Institute of Experimental Physics, Warsaw University, 00-681 Warsaw, Poland.
³⁹ Department of Physics, University of Washington, Seattle, Washington 98195-1560, USA.

PMID: 25279622
DOI: 10.1103/PhysRevLett.113.121802

Abstract

We present the results of searches for nucleon decay via n→ν[over ¯]π0 and p→ν[over ¯]π+ using data from a combined 172.8 kt·yr exposure of Super-Kamiokande-I,-II, and-III. We set lower limits on the partial lifetime for each of these modes: τn→ν[over ¯]π0>1.1×10(33) years and τp→ν[over ¯]π+>3.9×10(32) years at a 90% confidence level.