Observation of the east-west anisotropy of the atmospheric neutrino flux

被引：94

作者：

Futagami, T ^{[1
]}

Fukuda, Y

Hayakawa, T

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

Obayashi, Y

Okada, A

Okumura, K

Sakurai, N

Shiozawa, M

Suzuki, Y

Takeuchi, H

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

Casper, D

Gajewski, W

Kropp, WR

Mine, S

Price, LR

Smy, M

Sobel, HW

Vagins, MR

Ganezer, KS

Keig, WE

Ellsworth, RW

Tasaka, S

Kibayashi, A

Learned, JG

机构：

[1] Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan

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

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

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

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

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

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

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

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

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

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

[12] Univ Calif Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87544 USA

[13] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

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

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

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

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.82.5194

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The east-west anisotropy. caused by the deflection of primary cosmic rays in the Earth's magnetic field, is observed for the first time in the flux of atmospheric neutrinos. Using a 45 kt yr exposure of the Super-Kamiokande detector, 552 e-like and 633 mu-like horizontally going events are selected in the momentum range between 400 and 3000 MeV/c. The azimuthal distributions of e-like and mu-like events agree with the expectation from atmospheric neutrino flux calculations, verifying that the flux of atmospheric neutrinos in the GeV energy range is reasonably well modeled by calculations that account for the geomagnetic field.

引用

页码：5194 / 5197

页数：4

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