Format

Send to

Choose Destination
Phys Rev Lett. 2014 Sep 5;113(10):101801. Epub 2014 Sep 4.

Search for trilepton nucleon decay via p→e+νν and p→μ+νν in the Super-Kamiokande experiment.

Takhistov V1, Abe K2, Haga Y3, Hayato Y2, Ikeda M3, Iyogi K3, Kameda J2, Kishimoto Y2, Miura M2, Moriyama S2, Nakahata M2, Nakano Y3, Nakayama S2, Sekiya H2, Shiozawa M2, Suzuki Y2, Takeda A2, Tanaka H3, Tomura T2, Ueno K3, Wendell RA2, Yokozawa T3, Irvine T4, Kajita T5, Kametani I4, Kaneyuki K5, Lee KP4, McLachlan T4, Nishimura Y4, Richard E4, Okumura K5, Labarga L6, Fernandez P6, Berkman S7, Tanaka HA7, Tobayama S7, Gustafson J8, Kearns E9, Raaf JL8, Stone JL9, Sulak LR8, Goldhaber M10, Carminati G1, Kropp WR1, Mine S1, Weatherly P1, Renshaw A1, Smy MB11, Sobel HW11, Ganezer KS12, Hartfiel BL12, Hill J12, Keig WE12, Hong N13, Kim JY13, Lim IT13, Akiri T14, Himmel A14, Scholberg K15, Walter CW15, Wongjirad T14, Ishizuka T16, Tasaka S17, Jang JS18, Learned JG19, Matsuno S19, Smith SN19, Hasegawa T20, Ishida T20, Ishii T20, Kobayashi T20, Nakadaira T20, Nakamura K21, Oyama Y20, Sakashita K20, Sekiguchi T20, Tsukamoto T20, Suzuki AT22, Takeuchi Y22, Bronner C23, Hirota S23, Huang K23, Ieki K23, Kikawa T23, Minamino A23, Murakami A23, Nakaya T24, Suzuki K23, Takahashi S23, Tateishi K23, Fukuda Y25, Choi K26, Itow Y26, Mitsuka G26, Mijakowski P27, Hignight J28, Imber J28, Jung CK28, Yanagisawa C28, Ishino H29, Kibayashi A29, Koshio Y29, Mori T29, Sakuda M29, Yamaguchi R29, Yano T29, Kuno Y30, Tacik R31, Kim SB32, Okazawa H33, Choi Y34, Nishijima K35, Koshiba M36, Suda Y36, Totsuka Y36, Yokoyama M37, Martens K38, Marti L38, Vagins MR11, Martin JF39, de Perio P39, Konaka A40, Wilking MJ40, Chen S41, Zhang Y41, Connolly K42, Wilkes RJ42; Super-Kamiokande Collaboration.

Author information

1
Department of Physics and Astronomy, University of California, Irvine, Irvine, California 92697-4575, USA.
2
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 277-8582, Japan.
3
Kamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu 506-1205, Japan.
4
Research Center for Cosmic Neutrinos, Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582, Japan.
5
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 277-8582, Japan.
6
Department of Theoretical Physics, University Autonoma Madrid, 28049 Madrid, Spain.
7
Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, V6T1Z4, Canada.
8
Department of Physics, Boston University, Boston, Massachusetts 02215, USA.
9
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 277-8582, Japan.
10
Physics Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
11
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 277-8582, Japan.
12
Department of Physics, California State University, Dominguez Hills, Carson, California 90747, USA.
13
Department of Physics, Chonnam National University, Kwangju 500-757, Korea.
14
Department of Physics, Duke University, Durham, North Carolina 27708, USA.
15
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 277-8582, Japan.
16
Junior College, Fukuoka Institute of Technology, Fukuoka, Fukuoka 811-0295, Japan.
17
Department of Physics, Gifu University, Gifu, Gifu 501-1193, Japan.
18
GIST College, Gwangju Institute of Science and Technology, Gwangju 500-712, Korea.
19
Department of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii 96822, USA.
20
High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan.
21
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 277-8582, Japan.
22
Department of Physics, Kobe University, Kobe, Hyogo 657-8501, Japan.
23
Department of Physics, Kyoto University, Kyoto, Kyoto 606-8502, Japan.
24
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 277-8582, Japan.
25
Department of Physics, Miyagi University of Education, Sendai, Miyagi 980-0845, Japan.
26
Solar Terrestrial Environment Laboratory, Nagoya University, Nagoya, Aichi 464-8602, Japan.
27
National Centre For Nuclear Research, 00-681 Warsaw, Poland.
28
Department of Physics and Astronomy, State University of New York at Stony Brook, Stony Brook, New York 11794-3800, USA.
29
Department of Physics, Okayama University, Okayama, Okayama 700-8530, Japan.
30
Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.
31
Department of Physics, University of Regina, 3737 Wascana Parkway, Regina, Saskatchewan, S4SOA2, Canada and TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T2A3, Canada.
32
Department of Physics, Seoul National University, Seoul 151-742, Korea.
33
Department of Informatics in Social Welfare, Shizuoka University of Welfare, Yaizu, Shizuoka, 425-8611, Japan.
34
Department of Physics, Sungkyunkwan University, Suwon 440-746, Korea.
35
Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan.
36
The University of Tokyo, Bunkyo, Tokyo 113-0033, Japan.
37
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 277-8582, Japan.
38
Kavli Institute for the Physics and Mathematics of the Universe (WPI), Todai Institutes for Advanced Study, University of Tokyo, Kashiwa, Chiba 277-8582, Japan.
39
Department of Physics, University of Toronto, 60 Saint George Street, Toronto, Ontario, M5S1A7, Canada.
40
TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T2A3, Canada.
41
Department of Engineering Physics, Tsinghua University, Beijing, 100084, China.
42
Department of Physics, University of Washington, Seattle, Washington 98195-1560, USA.

Abstract

The trilepton nucleon decay modes p→e+νν and p→μ+νν violate |Δ(B-L)| by two units. Using data from a 273.4 kt yr exposure of Super-Kamiokande a search for these decays yields a fit consistent with no signal. Accordingly, lower limits on the partial lifetimes of τp→e+νν>1.7×10(32) years and τp→μ+νν>2.2×10(32) years at a 90% confidence level are obtained. These limits can constrain Grand Unified Theories which allow for such processes.

Supplemental Content

Full text links

Icon for American Physical Society
Loading ...
Support Center