Search for Proton Decay via p→e+π0 and p→μ+π0 in a Large Water Cherenkov Detector

被引：106

作者：

Nishino, H. ^{[1
]}

Clark, S. ^{[4
]}

Abe, K. ^{[2
]}

Hayato, Y. ^{[2
,3
]}

Iida, T. ^{[2
]}

Ikeda, M. ^{[2
]}

Kameda, J. ^{[2
]}

Kobayashi, K. ^{[2
]}

Koshio, Y. ^{[2
]}

Miura, M. ^{[2
]}

Moriyama, S. ^{[2
,3
]}

Nakahata, M. ^{[2
,3
]}

Nakayama, S. ^{[2
]}

Obayashi, Y. ^{[2
]}

Ogawa, H. ^{[2
]}

Sekiya, H. ^{[2
]}

Shiozawa, M. ^{[2
,3
]}

Suzuki, Y. ^{[2
,3
]}

Takeda, A. ^{[2
]}

Takenaga, Y. ^{[2
]}

Takeuchi, Y. ^{[2
,3
]}

Ueno, K. ^{[2
]}

Ueshima, K. ^{[2
]}

Watanabe, H. ^{[2
]}

Yamada, S. ^{[2
]}

Hazama, S. ^{[1
]}

Higuchi, I. ^{[1
]}

Ishihara, C. ^{[1
]}

Kajita, T. ^{[1
,3
]}

Kaneyuki, K. ^{[1
,3
]}

Mitsuka, G. ^{[1
]}

Okumura, K. ^{[1
]}

Tanimoto, N. ^{[1
]}

Vagins, M. R. ^{[3
,7
]}

Dufour, F. ^{[4
]}

Kearns, E. ^{[3
,4
]}

Litos, M. ^{[4
]}

Raaf, J. L. ^{[4
]}

Stone, J. L. ^{[3
,4
]}

Sulak, L. R. ^{[4
]}

Wang, W. ^{[4
]}

Goldhaber, M. ^{[5
]}

Dazeley, S. ^{[6
]}

Svoboda, R. ^{[6
]}

Bays, K. ^{[7
]}

Casper, D. ^{[7
]}

Cravens, J. P. ^{[7
]}

Kropp, W. R. ^{[7
]}

Mine, S. ^{[7
]}

Regis, C. ^{[7
]}

机构：

[1] Univ Tokyo, Res Ctr Cosm Neutrinos, Inst Cosm Ray Res, Chiba 2778582, Japan

[2] Univ Tokyo, Inst Cosm Ray Res, Kamioka Observ, Gifu 5061205, Japan

[3] Univ Tokyo, Inst Phys & Math Universe, Chiba 2778582, Japan

[4] Boston Univ, Dept Phys, Boston, MA 02215 USA

[5] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

[6] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

[7] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

[8] Calif State Univ Dominguez Hills, Dept Phys, Carson, CA 90747 USA

[9] Chonnam Natl Univ, Dept Phys, Kwangju 500757, South Korea

[10] Duke Univ, Dept Phys, Durham, NC 27708 USA

[11] Gifu Univ, Dept Phys, Gifu 5011193, Japan

[12] Univ Hawaii, Dept Phys & Astron, Honolulu, HI 96822 USA

[13] Kanagawa Univ, Dept Engn, Div Phys, Yokohama, Kanagawa 2218686, Japan

[14] KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan

[15] Kobe Univ, Dept Phys, Kobe, Hyogo 6578501, Japan

[16] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan

[17] Miyagi Univ Educ, Dept Phys, Sendai, Miyagi 9800845, Japan

[18] Nagoya Univ, Solar Terr Environm Lab, Aichi 4648602, Japan

[19] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA

[20] Niigata Univ, Dept Phys, Niigata 9502181, Japan

[21] Okayama Univ, Dept Phys, Okayama 7008530, Japan

[22] Osaka Univ, Dept Phys, Osaka 5600043, Japan

[23] Seoul Natl Univ, Dept Phys, Seoul 151742, South Korea

[24] Shizuoka Univ, Dept Syst Engn, Shizuoka 4328561, Japan

[25] Shizuoka Univ Welf, Dept Informat Social Welf, Shizuoka 4258611, Japan

[26] Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea

[27] Tokai Univ, Dept Phys, Kanagawa 2591292, Japan

[28] Univ Tokyo, Tokyo 1130033, Japan

[29] Tsinghua Univ, Dept Engn Phys, Beijing 100084, Peoples R China

[30] Univ Warsaw, Inst Expt Phys, PL-00681 Warsaw, Poland

[31] Univ Washington, Dept Phys, Seattle, WA 98195 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 14期

基金：

美国能源部;

关键词：

SIMULATION; LIFETIME; PHYSICS; SO(10);

D O I：

10.1103/PhysRevLett.102.141801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have searched for proton decays via p -> e(+)pi(0) and p ->mu(+)pi(0) using data from a 91.7 kt center dot yr exposure of Super-Kamiokande-I and a 49.2 kt center dot yr exposure of Super-Kamiokande-II. No candidate events were observed with expected backgrounds induced by atmospheric neutrinos of 0.3 events for each decay mode. From these results, we set lower limits on the partial lifetime of 8.2x10(33) and 6.6x10(33) years at 90% confidence level for p -> e(+)pi(0) and p ->mu(+)pi(0) modes, respectively.

引用

页数：5

共 23 条

[1] A NEW SYMMETRY-BREAKING PATTERN FOR SO(10) AND PROTON DECAY [J].

BARR, SM .

PHYSICS LETTERS B, 1982, 112 (03) :219-222

[2] NONELASTIC INTERACTIONS OF NUCLEONS AND PI MESONS WITH COMPLEX NUCLEI AT ENERGIES BELOW 3 GEV [J].

BERTINI, HW .

PHYSICAL REVIEW C, 1972, 6 (02) :631-+

[3]

BRUN R, 1993, W5013 CERN PROGR LIB

[4] The nuance neutrino physics simulation, and the future [J].

Casper, D .

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS, 2002, 112 :161-170

[5]

COVI L, ARXIVHEPPH0506255

[6] Flipping SU(5) out of trouble [J].

Ellis, J ;

Nanopoulos, DV ;

Walker, J .

PHYSICS LETTERS B, 2002, 550 (1-2) :99-107

[7] The Super-Kamiokande detector [J].

Fukuda, S ;

Fukuda, Y ;

Hayakawa, T ;

Ichihara, E ;

Ishitsuka, M ;

Itow, Y ;

Kajita, T ;

Kameda, J ;

Kaneyuki, K ;

Kasuga, S ;

Kobayashi, K ;

Kobayashi, Y ;

Koshio, Y ;

Miura, M ;

Moriyama, S ;

Nakahata, M ;

Nakayama, S ;

Namba, T ;

Obayashi, Y ;

Okada, A ;

Oketa, M ;

Okumura, K ;

Oyabu, T ;

Sakurai, N ;

Shiozawa, M ;

Suzuki, Y ;

Takeuchi, Y ;

Toshito, T ;

Totsuka, Y ;

Yamada, S ;

Desai, S ;

Earl, M ;

Hong, JT ;

Kearns, E ;

Masuzawa, M ;

Messier, MD ;

Stone, JL ;

Sulak, LR ;

Walter, CW ;

Wang, W ;

Scholberg, K ;

Barszczak, T ;

Casper, D ;

Liu, DW ;

Gajewski, W ;

Halverson, PG ;

Hsu, J ;

Kropp, WR ;

Mine, S ;

Price, LR .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2003, 501 (2-3) :418-462

[8] THE PHYSICS OF COMPENSATING CALORIMETRY AND THE NEW CALOR89 CODE SYSTEM [J].

GABRIEL, TA ;

BRAU, JE ;

BISHOP, BL .

IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 1989, 36 (01) :14-22

[9] UNITY OF ALL ELEMENTARY-PARTICLE FORCES [J].

GEORGI, H ;

GLASHOW, SL .

PHYSICAL REVIEW LETTERS, 1974, 32 (08) :438-441

[10]

Hayato Y., 2002, Nuclear Physics B, Proceedings Supplements, V112, P171, DOI 10.1016/S0920-5632(02)01759-0

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