Measurement of the K+→π+ν(ν)over-bar branching ratio

被引：91

作者：

Adler, S. ^{[1
]}

Anisimovsky, V. V. ^{[2
]}

Aoki, M.

Ardebili, M.

Artamonov, A. V. ^{[5
]}

Atiya, M. ^{[1
]}

Bassalleck, B. ^{[6
]}

Bazarko, A. O. ^{[4
]}

Bhuyan, B. ^{[1
]}

Blackmore, E. W. ^{[3
]}

Bryman, D. A. ^{[7
]}

Chen, S. ^{[8
]}

Chiang, I-H. ^{[1
]}

Christidi, I. -A. ^{[9
]}

Convery, M. R. ^{[4
]}

Cooper, P. S. ^{[10
]}

Diwan, M. V. ^{[1
]}

Frank, J. S. ^{[1
]}

Fujiwara, T. ^{[11
]}

Haggerty, J. ^{[1
]}

Hu, J.

Inagaki, T. ^{[12
]}

Ito, M. M. ^{[4
]}

Ivashkin, A. P. ^{[2
]}

Jaffe, D. E. ^{[1
]}

Kabe, S. ^{[12
]}

Kazumori, M. ^{[12
]}

Kuno, Y. ^{[12
]}

Kuriki, M. ^{[12
]}

Kettell, S. H. ^{[1
]}

Khabibullin, M. M. ^{[2
]}

Khotjantsev, A. N. ^{[2
]}

Kitching, P. ^{[13
]}

Kobayashi, M. ^{[12
]}

Komatsubara, T. K. ^{[12
]}

Konaka, A. ^{[3
]}

Kozhevnikov, A. P. ^{[5
]}

Kudenko, Yu. G. ^{[2
]}

Kushnirenko, A. ^{[10
]}

Landsberg, L. G. ^{[5
]}

Lewis, B. ^{[6
]}

Li, K. K. ^{[1
]}

Littenberg, L. S. ^{[1
]}

Macdonald, J. A. ^{[3
]}

Marlow, D. R. ^{[4
]}

McPherson, R. A. ^{[4
]}

Meyers, P. D. ^{[4
]}

Mildenberger, J. ^{[3
]}

Mineev, O. V. ^{[2
]}

Miyajima, M.

机构：

[1] Brookhaven Natl Lab, Upton, NY 11973 USA

[2] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia

[3] TRIUMF, Vancouver, BC V6T 2A3, Canada

[4] Princeton Univ, Joseph Henry Labs, Princeton, NJ 08544 USA

[5] Inst High Energy Phys, Moscow 142280, Russia

[6] Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA

[7] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

[8] Tsinghua Univ, Dept Phys & Astron, Beijing 100084, Peoples R China

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

[10] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

[11] Kyoto Univ, Dept Phys, Sakyo Ku, Kyoto 6068502, Japan

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

[13] Univ Alberta, Ctr Subatom Res, Edmonton, AB T6G 2N5, Canada

[14] Univ Fukui, Dept Appl Phys, Bunkyo Ku, Fukui 9108507, Japan

[15] Osaka Univ, Res Ctr Nucl Phys, Osaka 5670047, Japan

[16] Osaka Univ, Nucl Studies Lab, Osaka 5600043, Japan

[17] Natl Def Acad, Dept Appl Phys, Kanagawa 2398686, Japan

来源：

PHYSICAL REVIEW D | 2008年 / 77卷 / 05期

关键词：

D O I：

10.1103/PhysRevD.77.052003

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Experiment E949 at Brookhaven National Laboratory studied the rare decay K+ -> pi(+)nu(nu) over bar and other processes with an exposure of 1.77 x 10(12) K+'s. The data were analyzed using a blind analysis technique yielding one candidate event with an estimated background of 0.30 +/- 0.03 events. Combining this result with the observation of two candidate events by the predecessor experiment E787 gave the branching ratio B(K+ -> pi(+)nu (nu) = 1.47(-0.89)(+1.30) x 10(-10), consistent with the standard model prediction of (0.74 +/- 0.20) x 10(-10). This is a more detailed report of results previously published [V. V. Anisimovsky et al., Phys. Rev. Lett. 93, 031801 (2004)].

引用

页数：40

共 87 条

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Aoki, M ;

Ardebili, M ;

Atiya, MS ;

Bazarko, AO ;

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Kozhevnikov, AP ;

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Kushnirenko, A ;

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PHYSICAL REVIEW D, 2005, 72 (09)

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