An upper limit on cosmic-ray p̄/p flux ratio estimated by the Moon's shadow with the Tibet III air shower array

M. Amenomori; S. Ayabe; D. Chen; W. Cui; Danzengluobu; L. K. Ding; X. H. Ding; C. F. Feng; Z. Y. Feng; X. Y. Gao; Q. X. Geng; H. W. Guo; H. H. He; M. He; I. Ohta; N. Hotta; Haibing Hu; H. B. Hu; J. Huang; Q. Huang; H. Y. Jia; F. Kajino; T. Saito; Y. Katayose; C. Kato; K. Kasahara; Labaciren; G. M. Le; J. Y. Li; H. Lu; S. L. Lu; X. R. Meng; K. Mizutani; J. Mu; K. Munakata; A. Nagai; H. Nanjo; M. Nishizawa; M. Ohnishi; H. Onuma; T. Ouchi; Shunsuke Ozawa; J. R. Ren; K. Kawata; Zhaxisangzhu; T. Sasaki; M. Shibata; A. Shiomi; T. Shirai; H. Sugimoto; H. M. Zhang; N. Tateyama; Shoji Torii; H. Tsuchiya; H. Wang; X. Wang; Y. G. Wang; H. R. Wu; L. Xue; M. Takita; Y. Yamamoto; C. T. Yan; X. C. Yang; S. Yasue; Z. H. Ye; G. C. Yu; S. Udo; T. Yuda; J. L. Zhang; N. J. Zhang; X. Y. Zhang; Y. Zhang; Yi Zhang; M. Sakata; A. F. Yuan; Y. H. Tan; K. Hibino; X. X. Zhou

An upper limit on cosmic-ray p̄/p flux ratio estimated by the Moon's shadow with the Tibet III air shower array

M. Amenomori, S. Ayabe, D. Chen, W. Cui, Danzengluobu, L. K. Ding, X. H. Ding, C. F. Feng, Z. Y. Feng, X. Y. Gao, Q. X. Geng, H. W. Guo, H. H. He, M. He, I. Ohta, N. Hotta, Haibing Hu, H. B. Hu, J. Huang, Q. HuangH. Y. Jia, F. Kajino, T. Saito, Y. Katayose, C. Kato, K. Kasahara, Labaciren, G. M. Le, J. Y. Li, H. Lu, S. L. Lu, X. R. Meng, K. Mizutani, J. Mu, K. Munakata, A. Nagai, H. Nanjo, M. Nishizawa, M. Ohnishi, H. Onuma, T. Ouchi, Shunsuke Ozawa, J. R. Ren, K. Kawata, Zhaxisangzhu, T. Sasaki, M. Shibata, A. Shiomi, T. Shirai, H. Sugimoto, H. M. Zhang, N. Tateyama, Shoji Torii, H. Tsuchiya, H. Wang, X. Wang, Y. G. Wang, H. R. Wu, L. Xue, M. Takita, Y. Yamamoto, C. T. Yan, X. C. Yang, S. Yasue, Z. H. Ye, G. C. Yu, S. Udo, T. Yuda, J. L. Zhang, N. J. Zhang, X. Y. Zhang, Y. Zhang, Yi Zhang, M. Sakata, A. F. Yuan, Y. H. Tan, K. Hibino^*, X. X. Zhou

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The Tibet air shower array has been in operation since 1999 as Tibet III (22,050m²) with energy threshold of a few TeV. As primary cosmic rays are shielded by the Moon having the finite size of 0.5 degree in diameter, we observe a deficit in cosmic rays called the Moon's shadow with sufficient statistical significance. The center of the Moon's shadow shifts westwardly due to the geomagnetic field. By analyzing this energy-dependent westward displacement carefully, we set an upper limit of about 5% at 90% confidence level on the cosmic-ray antiproton/proton ratio at multi-TeV energies.

Original language	English
Title of host publication	29th International Cosmic Ray Conference, ICRC 2005
Publisher	Tata Institute of Fundamental Research
Pages	45-48
Number of pages	4
Volume	6
Publication status	Published - 2005
Event	29th International Cosmic Ray Conference, ICRC 2005 - Pune Duration: 2005 Aug 3 → 2005 Aug 10

Other

Other	29th International Cosmic Ray Conference, ICRC 2005
City	Pune
Period	05/8/3 → 05/8/10

ASJC Scopus subject areas

Nuclear and High Energy Physics

Cite this

Amenomori, M., Ayabe, S., Chen, D., Cui, W., Danzengluobu, Ding, L. K., Ding, X. H., Feng, C. F., Feng, Z. Y., Gao, X. Y., Geng, Q. X., Guo, H. W., He, H. H., He, M., Ohta, I., Hotta, N., Hu, H., Hu, H. B., Huang, J., ... Zhou, X. X. (2005). An upper limit on cosmic-ray p̄/p flux ratio estimated by the Moon's shadow with the Tibet III air shower array. In 29th International Cosmic Ray Conference, ICRC 2005 (Vol. 6, pp. 45-48). Tata Institute of Fundamental Research.

Amenomori, M, Ayabe, S, Chen, D, Cui, W, Danzengluobu, Ding, LK, Ding, XH, Feng, CF, Feng, ZY, Gao, XY, Geng, QX, Guo, HW, He, HH, He, M, Ohta, I, Hotta, N, Hu, H, Hu, HB, Huang, J, Huang, Q, Jia, HY, Kajino, F, Saito, T, Katayose, Y, Kato, C, Kasahara, K, Labaciren, Le, GM, Li, JY, Lu, H, Lu, SL, Meng, XR, Mizutani, K, Mu, J, Munakata, K, Nagai, A, Nanjo, H, Nishizawa, M, Ohnishi, M, Onuma, H, Ouchi, T, Ozawa, S, Ren, JR, Kawata, K, Zhaxisangzhu, Sasaki, T, Shibata, M, Shiomi, A, Shirai, T, Sugimoto, H, Zhang, HM, Tateyama, N, Torii, S, Tsuchiya, H, Wang, H, Wang, X, Wang, YG, Wu, HR, Xue, L, Takita, M, Yamamoto, Y, Yan, CT, Yang, XC, Yasue, S, Ye, ZH, Yu, GC, Udo, S, Yuda, T, Zhang, JL, Zhang, NJ, Zhang, XY, Zhang, Y, Zhang, Y, Sakata, M, Yuan, AF, Tan, YH, Hibino, K & Zhou, XX 2005, An upper limit on cosmic-ray p̄/p flux ratio estimated by the Moon's shadow with the Tibet III air shower array. in 29th International Cosmic Ray Conference, ICRC 2005. vol. 6, Tata Institute of Fundamental Research, pp. 45-48, 29th International Cosmic Ray Conference, ICRC 2005, Pune, 05/8/3.

@inproceedings{85d86ec2e89c44b28c8cdf469941f67e,

title = "An upper limit on cosmic-ray {\=p}/p flux ratio estimated by the Moon's shadow with the Tibet III air shower array",

abstract = "The Tibet air shower array has been in operation since 1999 as Tibet III (22,050m2) with energy threshold of a few TeV. As primary cosmic rays are shielded by the Moon having the finite size of 0.5 degree in diameter, we observe a deficit in cosmic rays called the Moon's shadow with sufficient statistical significance. The center of the Moon's shadow shifts westwardly due to the geomagnetic field. By analyzing this energy-dependent westward displacement carefully, we set an upper limit of about 5% at 90% confidence level on the cosmic-ray antiproton/proton ratio at multi-TeV energies.",

author = "M. Amenomori and S. Ayabe and D. Chen and W. Cui and Danzengluobu and Ding, {L. K.} and Ding, {X. H.} and Feng, {C. F.} and Feng, {Z. Y.} and Gao, {X. Y.} and Geng, {Q. X.} and Guo, {H. W.} and He, {H. H.} and M. He and I. Ohta and N. Hotta and Haibing Hu and Hu, {H. B.} and J. Huang and Q. Huang and Jia, {H. Y.} and F. Kajino and T. Saito and Y. Katayose and C. Kato and K. Kasahara and Labaciren and Le, {G. M.} and Li, {J. Y.} and H. Lu and Lu, {S. L.} and Meng, {X. R.} and K. Mizutani and J. Mu and K. Munakata and A. Nagai and H. Nanjo and M. Nishizawa and M. Ohnishi and H. Onuma and T. Ouchi and Shunsuke Ozawa and Ren, {J. R.} and K. Kawata and Zhaxisangzhu and T. Sasaki and M. Shibata and A. Shiomi and T. Shirai and H. Sugimoto and Zhang, {H. M.} and N. Tateyama and Shoji Torii and H. Tsuchiya and H. Wang and X. Wang and Wang, {Y. G.} and Wu, {H. R.} and L. Xue and M. Takita and Y. Yamamoto and Yan, {C. T.} and Yang, {X. C.} and S. Yasue and Ye, {Z. H.} and Yu, {G. C.} and S. Udo and T. Yuda and Zhang, {J. L.} and Zhang, {N. J.} and Zhang, {X. Y.} and Y. Zhang and Yi Zhang and M. Sakata and Yuan, {A. F.} and Tan, {Y. H.} and K. Hibino and Zhou, {X. X.}",

year = "2005",

language = "English",

volume = "6",

pages = "45--48",

booktitle = "29th International Cosmic Ray Conference, ICRC 2005",

publisher = "Tata Institute of Fundamental Research",

note = "29th International Cosmic Ray Conference, ICRC 2005 ; Conference date: 03-08-2005 Through 10-08-2005",

}

TY - GEN

T1 - An upper limit on cosmic-ray p̄/p flux ratio estimated by the Moon's shadow with the Tibet III air shower array

AU - Amenomori, M.

AU - Ayabe, S.

AU - Chen, D.

AU - Cui, W.

AU - Danzengluobu,

AU - Ding, L. K.

AU - Ding, X. H.

AU - Feng, C. F.

AU - Feng, Z. Y.

AU - Gao, X. Y.

AU - Geng, Q. X.

AU - Guo, H. W.

AU - He, H. H.

AU - He, M.

AU - Ohta, I.

AU - Hotta, N.

AU - Hu, Haibing

AU - Hu, H. B.

AU - Huang, J.

AU - Huang, Q.

AU - Jia, H. Y.

AU - Kajino, F.

AU - Saito, T.

AU - Katayose, Y.

AU - Kato, C.

AU - Kasahara, K.

AU - Labaciren,

AU - Le, G. M.

AU - Li, J. Y.

AU - Lu, H.

AU - Lu, S. L.

AU - Meng, X. R.

AU - Mizutani, K.

AU - Mu, J.

AU - Munakata, K.

AU - Nagai, A.

AU - Nanjo, H.

AU - Nishizawa, M.

AU - Ohnishi, M.

AU - Onuma, H.

AU - Ouchi, T.

AU - Ozawa, Shunsuke

AU - Ren, J. R.

AU - Kawata, K.

AU - Zhaxisangzhu,

AU - Sasaki, T.

AU - Shibata, M.

AU - Shiomi, A.

AU - Shirai, T.

AU - Sugimoto, H.

AU - Zhang, H. M.

AU - Tateyama, N.

AU - Torii, Shoji

AU - Tsuchiya, H.

AU - Wang, H.

AU - Wang, X.

AU - Wang, Y. G.

AU - Wu, H. R.

AU - Xue, L.

AU - Takita, M.

AU - Yamamoto, Y.

AU - Yan, C. T.

AU - Yang, X. C.

AU - Yasue, S.

AU - Ye, Z. H.

AU - Yu, G. C.

AU - Udo, S.

AU - Yuda, T.

AU - Zhang, J. L.

AU - Zhang, N. J.

AU - Zhang, X. Y.

AU - Zhang, Y.

AU - Zhang, Yi

AU - Sakata, M.

AU - Yuan, A. F.

AU - Tan, Y. H.

AU - Hibino, K.

AU - Zhou, X. X.

PY - 2005

Y1 - 2005

N2 - The Tibet air shower array has been in operation since 1999 as Tibet III (22,050m2) with energy threshold of a few TeV. As primary cosmic rays are shielded by the Moon having the finite size of 0.5 degree in diameter, we observe a deficit in cosmic rays called the Moon's shadow with sufficient statistical significance. The center of the Moon's shadow shifts westwardly due to the geomagnetic field. By analyzing this energy-dependent westward displacement carefully, we set an upper limit of about 5% at 90% confidence level on the cosmic-ray antiproton/proton ratio at multi-TeV energies.

AB - The Tibet air shower array has been in operation since 1999 as Tibet III (22,050m2) with energy threshold of a few TeV. As primary cosmic rays are shielded by the Moon having the finite size of 0.5 degree in diameter, we observe a deficit in cosmic rays called the Moon's shadow with sufficient statistical significance. The center of the Moon's shadow shifts westwardly due to the geomagnetic field. By analyzing this energy-dependent westward displacement carefully, we set an upper limit of about 5% at 90% confidence level on the cosmic-ray antiproton/proton ratio at multi-TeV energies.

UR - http://www.scopus.com/inward/record.url?scp=84899006878&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84899006878&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:84899006878

VL - 6

SP - 45

EP - 48

BT - 29th International Cosmic Ray Conference, ICRC 2005

PB - Tata Institute of Fundamental Research

T2 - 29th International Cosmic Ray Conference, ICRC 2005

Y2 - 3 August 2005 through 10 August 2005

ER -

An upper limit on cosmic-ray p̄/p flux ratio estimated by the Moon's shadow with the Tibet III air shower array

Abstract

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ASJC Scopus subject areas

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