Search for dinucleon decay into kaons in Super-Kamiokande

M Litos; K Abe; Y Hayato; T Iida; M Ikeda; K Iyogi; J Kameda; K Kobayashi; Y Koshio; Y Kozuma; M Miura; S Moriyama; M Nakahata; S Nakayama; Y Obayashi; H Ogawa; H Sekiya; M Shiozawa; Y Suzuki; A Takeda; Y Takenaga; Y Takeuchi; K Ueno; K Ueshima; H Watanabe; S Yamada; T Yokozawa; S Hazama; C Ishihara; H Kaji; T Kajita; K Kaneyuki; T McLachlan; K Okumura; Y Shimizu; N Tanimoto; M R Vagins; E Kearns; J L Stone; L R Sulak; F Dufour; J L Raaf; B Henning; M Goldhaber; K Bays; D Casper; J P Cravens; W R Kropp; S Mine; C Regis; 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; T Wongjirad; R Wendell; K Scholberg; C W Walter; S Tasaka; J G Learned; S Matsuno; Y Watanabe; T Hasegawa; T Ishida; T Ishii; T Kobayashi; T Nakadaira; K Nakamura; K Nishikawa; H Nishino; Y Oyama; K Sakashita; T Sekiguchi; T Tsukamoto; A T Suzuki; A Minamino; T Nakaya; Y Fukuda; Y Itow; G Mitsuka; T Tanaka; C K Jung; G Lopez; C McGrew; R Terri; C Yanagisawa; N Tamura; H Ishino; A Kibayashi; S Mino; T Mori; M Sakuda; H Toyota; Y Kuno; M Yoshida; S B Kim; B S Yang; T Ishizuka; H Okazawa; Y Choi; K Nishijima; Y Yokosawa; M Koshiba; M Yokoyama; Y Totsuka; 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.112.131803

Search for dinucleon decay into kaons in Super-Kamiokande

Phys Rev Lett. 2014 Apr 4;112(13):131803. doi: 10.1103/PhysRevLett.112.131803. Epub 2014 Apr 4.

Authors

M Litos¹, K Abe², Y Hayato³, T Iida², M Ikeda², K Iyogi², J Kameda², K Kobayashi², Y Koshio², Y Kozuma², M Miura², S Moriyama³, M Nakahata³, S Nakayama², Y Obayashi², H Ogawa², H Sekiya², M Shiozawa³, Y Suzuki³, A Takeda², Y Takenaga², Y Takeuchi³, K Ueno², K Ueshima², H Watanabe², S Yamada², T Yokozawa², S Hazama⁴, C Ishihara⁴, H Kaji⁴, T Kajita⁵, K Kaneyuki⁵, T McLachlan⁴, K Okumura⁴, Y Shimizu⁴, N Tanimoto⁴, M R Vagins⁶, E Kearns⁷, J L Stone⁷, L R Sulak¹, F Dufour¹, J L Raaf¹, B Henning¹, M Goldhaber⁸, K Bays⁹, D Casper⁹, J P Cravens⁹, W R Kropp⁹, S Mine⁹, C Regis⁹, M B Smy⁶, H W Sobel⁶, K S Ganezer¹⁰, J Hill¹⁰, W E Keig¹⁰, J S Jang¹¹, J Y Kim¹¹, I T Lim¹¹, J B Albert¹², T Wongjirad¹², R Wendell¹², K Scholberg¹³, C W Walter¹³, S Tasaka¹⁴, J G Learned¹⁵, S Matsuno¹⁵, Y Watanabe¹⁶, T Hasegawa¹⁷, T Ishida¹⁷, T Ishii¹⁷, T Kobayashi¹⁷, T Nakadaira¹⁷, K Nakamura¹⁸, K Nishikawa¹⁷, H Nishino¹⁷, Y Oyama¹⁷, K Sakashita¹⁷, T Sekiguchi¹⁷, T Tsukamoto¹⁷, A T Suzuki¹⁹, A Minamino²⁰, T Nakaya²¹, Y Fukuda²², Y Itow²³, G Mitsuka²³, T Tanaka²³, C K Jung²⁴, G Lopez²⁴, C McGrew²⁴, R Terri²⁴, C Yanagisawa²⁴, N Tamura²⁵, H Ishino²⁶, A Kibayashi²⁶, S Mino²⁶, T Mori²⁶, M Sakuda²⁶, H Toyota²⁶, Y Kuno²⁷, M Yoshida²⁷, S B Kim²⁸, B S Yang²⁸, T Ishizuka²⁹, H Okazawa³⁰, Y Choi³¹, K Nishijima³², Y Yokosawa³², M Koshiba³³, M Yokoyama³³, Y Totsuka³³, S Chen³⁴, Y Heng³⁴, Z Yang³⁴, H Zhang³⁴, D Kielczewska³⁵, P Mijakowski³⁵, K Connolly³⁶, M Dziomba³⁶, E Thrane³⁶, R J Wilkes³⁶; Super-Kamiokande Collaboration

Affiliations

¹ Department of Physics, Boston University, Boston, Massachusetts 02215, USA.
² Kamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu 506-1205, Japan.
³ Kamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu 506-1205, Japan and Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo, Kashiwa, Chiba 277-8583, Japan.
⁴ Research Center for Cosmic Neutrinos, Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582, Japan.
⁵ Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo, Kashiwa, Chiba 277-8583, Japan and Research Center for Cosmic Neutrinos, Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582, Japan.
⁶ Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo, Kashiwa, Chiba 277-8583, Japan and Department of Physics and Astronomy, University of California, Irvine, Irvine, California 92697-4575, USA.
⁷ Department of Physics, Boston University, Boston, Massachusetts 02215, USA and Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo, Kashiwa, Chiba 277-8583, Japan.
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, California State University, Dominguez Hills, Carson, California 90747, USA.
¹¹ Department of Physics, Chonnam National University, Kwangju 500-757, Korea.
¹² Department of Physics, Duke University, Durham, North Carolina 27708, USA.
¹³ Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo, Kashiwa, Chiba 277-8583, Japan and Department of Physics, Duke University, Durham, North Carolina 27708, USA.
¹⁴ Department of Physics, Gifu University, Gifu, Gifu 501-1193, Japan.
¹⁵ Department of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii 96822, USA.
¹⁶ Physics Division, Department of Engineering, Kanagawa University, Kanagawa, Yokohama 221-8686, Japan.
¹⁷ High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan.
¹⁸ Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo, Kashiwa, Chiba 277-8583, Japan and High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan.
¹⁹ Department of Physics, Kobe University, Kobe, Hyogo 657-8501, Japan.
²⁰ Department of Physics, Kyoto University, Kyoto, Kyoto 606-8502, Japan.
²¹ Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo, Kashiwa, Chiba 277-8583, Japan and Department of Physics, Kyoto University, Kyoto, Kyoto 606-8502, Japan.
²² Department of Physics, Miyagi University of Education, Sendai, Miyagi 980-0845, Japan.
²³ Solar Terrestrial Environment Laboratory, Nagoya University, Nagoya, Aichi 464-8602, Japan.
²⁴ Department of Physics and Astronomy, State University of New York, Stony Brook, New York 11794-3800, USA.
²⁵ Department of Physics, Niigata University, Niigata, Niigata 950-2181, Japan.
²⁶ Department of Physics, Okayama University, Okayama, Okayama 700-8530, Japan.
²⁷ Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.
²⁸ Department of Physics, Seoul National University, Seoul 151-742, Korea.
²⁹ Department of Systems Engineering, Shizuoka University, Hamamatsu, Shizuoka 432-8561, Japan.
³⁰ Department of Informatics in Social Welfare, Shizuoka University of Welfare, Yaizu, Shizuoka 425-8611, Japan.
³¹ Department of Physics, Sungkyunkwan University, Suwon 440-746, Korea.
³² Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan.
³³ The University of Tokyo, Bunkyo, Tokyo 113-0033, Japan.
³⁴ Department of Engineering Physics, Tsinghua University, Beijing 100084, China.
³⁵ Institute of Experimental Physics, Warsaw University, 00-681 Warsaw, Poland.
³⁶ Department of Physics, University of Washington, Seattle, Washington 98195-1560, USA.

PMID: 24745406
DOI: 10.1103/PhysRevLett.112.131803

Abstract

A search for the dinucleon decay pp → K+ K+ has been performed using 91.6 kton·yr data from Super-Kamiokande-I. This decay provides a sensitive probe of the R-parity-violating parameter λ112''. A boosted decision tree analysis found no signal candidates in the data. The expected background was 0.28±0.19 atmospheric neutrino induced events and the estimated signal detection efficiency was 12.6%±3.2%. A lower limit of 1.7×10(32) years has been placed on the partial lifetime of the decay O16 → C14K+ K+ at 90% C.L. A corresponding upper limit of 7.8×10(-9) has been placed on the parameter λ112''.