Search for proton decay via p→e+ π0 in a large water Cherenkov detector

被引：120

作者：

Shiozawa, M ^{[1
]}

Viren, B

Fukuda, Y

Hayakawa, T

Ichihara, E

Inoue, K

Ishihara, K

Ishino, H

Itow, Y

Kajita, T

Kameda, J

Kasuga, S

Kobayashi, K

Kobayashi, Y

Koshio, Y

Miura, M

Nakahata, M

Nakayama, S

Okada, A

Oketa, M

Okumura, K

Ota, M

Sakurai, N

Suzuki, Y

Takeuchi, Y

Totsuka, Y

Yamada, S

Earl, M

Habig, A

Kearns, E

Messier, MD

Scholberg, K

Stone, JL

Sulak, LR

Walter, CW

Goldhaber, M

Barszczak, T

Gajewski, W

Halverson, PG

Hsu, J

Kropp, WR

Price, LR

Reines, F

Sobel, HW

Vagins, MR

Ganezer, KS

Keig, WE

Ellsworth, RW

Tasaka, S

Flanagan, JW

机构：

[1] Univ Tokyo, Inst Cosm Ray Res, Tokyo 1888502, Japan

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

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

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

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

[6] George Mason Univ, Dept Phys, Fairfax, VA 22030 USA

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

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

[9] High Energy Accelerator Res Org KEK, Inst Particle & Nucl Studies, Ibaraki 3050801, Japan

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

[11] Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87544 USA

[12] Louisiana State Univ, Dept Phys, Baton Rouge, LA 70803 USA

[13] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

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

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

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

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

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

[19] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

[20] Univ Tokyo, Tokyo 1130033, Japan

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

[22] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan

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

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

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.81.3319

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have searched for proton decay via p --> e(+)pi(0) using data from a 25.5 kton . yr exposure of the Super-Kamiokande detector. We find no candidate events with an expected background induced by atmospheric neutrinos of 0.1 events. From these data, we set a lower limit on the partial lifetime of the proton tau/Bp-->e+pi 0 to be 1.6 x 10(33) years at a 99% confidence level. [S0031-9007(98)07309-8].

引用

页码：3319 / 3323

页数：5

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