Improved measurement of the K+ → π+ νν̄ branching ratio

V. V. Anisimovsky; A. V. Artamonov; B. Bassalleck; B. Bhuyan; E. W. Blackmore; D. A. Bryman; S. Chen; I. H. Chiang; I. A. Christidi; P. S. Cooper; M. V. Diwan; J. S. Frank; T. Fujiwara; J. Hu; A. P. Ivashkin; D. E. Jaffe; S. Kabe; S. H. Kettell; M. M. Khabibullin; A. N. Khotjantsev; P. Kitching; M. Kobayashi; T. K. Komatsubara; A. Konaka; A. P. Kozhevnikov; Yu G. Kudenko; A. Kushnirenko; L. G. Landsberg; B. Lewis; K. K. Li; L. S. Littenberg; J. A. Macdonald; J. Mildenberger; O. V. Mineev; M. Miyajima; K. Mizouchi; V. A. Mukhin; N. Muramatsu; T. Nakano; M. Nomachi; T. Nomura; T. Numao; V. F. Obraztsov; K. Omata; D. I. Patalakha; S. V. Petrenko; R. Poutissou; E. J. Ramberg; G. Redlinger; T. Sato; T. Sekiguchi; T. Shinkawa; R. C. Strand; S. Sugimoto; Y. Tamagawa; R. Tschirhart; T. Tsunemi; D. V. Vavilov; B. Viren; N. V. Yershov; Y. Yoshimura; T. Yoshioka

doi:10.1103/PhysRevLett.93.031801

Improved measurement of the K⁺ → π⁺ νν̄ branching ratio

V. V. Anisimovsky, A. V. Artamonov, B. Bassalleck, B. Bhuyan, E. W. Blackmore, D. A. Bryman, S. Chen, I. H. Chiang, I. A. Christidi, P. S. Cooper, M. V. Diwan, J. S. Frank, T. Fujiwara, J. Hu, A. P. Ivashkin, D. E. Jaffe, S. Kabe, S. H. Kettell, M. M. Khabibullin, A. N. KhotjantsevP. Kitching, M. Kobayashi, T. K. Komatsubara, A. Konaka, A. P. Kozhevnikov, Yu G. Kudenko, A. Kushnirenko, L. G. Landsberg, B. Lewis, K. K. Li, L. S. Littenberg, J. A. Macdonald, J. Mildenberger, O. V. Mineev, M. Miyajima, K. Mizouchi, V. A. Mukhin, N. Muramatsu, T. Nakano, M. Nomachi, T. Nomura, T. Numao, V. F. Obraztsov, K. Omata, D. I. Patalakha, S. V. Petrenko, R. Poutissou, E. J. Ramberg, G. Redlinger, T. Sato, T. Sekiguchi, T. Shinkawa, R. C. Strand, S. Sugimoto, Y. Tamagawa, R. Tschirhart, T. Tsunemi, D. V. Vavilov, B. Viren, N. V. Yershov, Y. Yoshimura, T. Yoshioka

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Abstract

The upper kinematic limit for K⁺→π ⁺νν̄ was observed by experiment E949 at Brookhaven National Laboratory. The new procedure enabled to estimates of the expected background and signal rates inside and outside the signal region. Examination of the signal region for the data set yielded one event with P=227.3±2.7 MeV/c, R=39.2±1.2 cm and E=128.9±3.6 MeV. It was suggested that at the measured central value of the branching ratio, the additional event had a signal to background ratio of 0.9.

Original language	English
Article number	031801
Pages (from-to)	031801-1-031801-4
Journal	Physical review letters
Volume	93
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevLett.93.031801
Publication status	Published - 2004 Jul 16
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.93.031801

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Anisimovsky, V. V., Artamonov, A. V., Bassalleck, B., Bhuyan, B., Blackmore, E. W., Bryman, D. A., Chen, S., Chiang, I. H., Christidi, I. A., Cooper, P. S., Diwan, M. V., Frank, J. S., Fujiwara, T., Hu, J., Ivashkin, A. P., Jaffe, D. E., Kabe, S., Kettell, S. H., Khabibullin, M. M., ... Yoshioka, T. (2004). Improved measurement of the K⁺ → π⁺ νν̄ branching ratio. Physical review letters, 93(3), 031801-1-031801-4. [031801]. https://doi.org/10.1103/PhysRevLett.93.031801

Anisimovsky, VV, Artamonov, AV, Bassalleck, B, Bhuyan, B, Blackmore, EW, Bryman, DA, Chen, S, Chiang, IH, Christidi, IA, Cooper, PS, Diwan, MV, Frank, JS, Fujiwara, T, Hu, J, Ivashkin, AP, Jaffe, DE, Kabe, S, Kettell, SH, Khabibullin, MM, Khotjantsev, AN, Kitching, P, Kobayashi, M, Komatsubara, TK, Konaka, A, Kozhevnikov, AP, Kudenko, YG, Kushnirenko, A, Landsberg, LG, Lewis, B, Li, KK, Littenberg, LS, Macdonald, JA, Mildenberger, J, Mineev, OV, Miyajima, M, Mizouchi, K, Mukhin, VA, Muramatsu, N, Nakano, T, Nomachi, M, Nomura, T, Numao, T, Obraztsov, VF, Omata, K, Patalakha, DI, Petrenko, SV, Poutissou, R, Ramberg, EJ, Redlinger, G, Sato, T, Sekiguchi, T, Shinkawa, T, Strand, RC, Sugimoto, S, Tamagawa, Y, Tschirhart, R, Tsunemi, T, Vavilov, DV, Viren, B, Yershov, NV, Yoshimura, Y & Yoshioka, T 2004, 'Improved measurement of the K⁺ → π⁺ νν̄ branching ratio', Physical review letters, vol. 93, no. 3, 031801, pp. 031801-1-031801-4. https://doi.org/10.1103/PhysRevLett.93.031801

@article{1b645a73e0f448ffa98cc92eae671c52,

title = "Improved measurement of the K+ → π+ ν{\=ν} branching ratio",

abstract = "The upper kinematic limit for K+→π +ν{\=ν} was observed by experiment E949 at Brookhaven National Laboratory. The new procedure enabled to estimates of the expected background and signal rates inside and outside the signal region. Examination of the signal region for the data set yielded one event with P=227.3±2.7 MeV/c, R=39.2±1.2 cm and E=128.9±3.6 MeV. It was suggested that at the measured central value of the branching ratio, the additional event had a signal to background ratio of 0.9.",

author = "Anisimovsky, {V. V.} and Artamonov, {A. V.} and B. Bassalleck and B. Bhuyan and Blackmore, {E. W.} and Bryman, {D. A.} and S. Chen and Chiang, {I. H.} and Christidi, {I. A.} and Cooper, {P. S.} and Diwan, {M. V.} and Frank, {J. S.} and T. Fujiwara and J. Hu and Ivashkin, {A. P.} and Jaffe, {D. E.} and S. Kabe and Kettell, {S. H.} and Khabibullin, {M. M.} and Khotjantsev, {A. N.} and P. Kitching and M. Kobayashi and Komatsubara, {T. K.} and A. Konaka and Kozhevnikov, {A. P.} and Kudenko, {Yu G.} and A. Kushnirenko and Landsberg, {L. G.} and B. Lewis and Li, {K. K.} and Littenberg, {L. S.} and Macdonald, {J. A.} and J. Mildenberger and Mineev, {O. V.} and M. Miyajima and K. Mizouchi and Mukhin, {V. A.} and N. Muramatsu and T. Nakano and M. Nomachi and T. Nomura and T. Numao and Obraztsov, {V. F.} and K. Omata and Patalakha, {D. I.} and Petrenko, {S. V.} and R. Poutissou and Ramberg, {E. J.} and G. Redlinger and T. Sato and T. Sekiguchi and T. Shinkawa and Strand, {R. C.} and S. Sugimoto and Y. Tamagawa and R. Tschirhart and T. Tsunemi and Vavilov, {D. V.} and B. Viren and Yershov, {N. V.} and Y. Yoshimura and T. Yoshioka",

note = "Funding Information: We acknowledge the dedicated effort of the technical staff supporting E949, the Brookhaven C-A Department, and the contributions made by colleagues who participated in E787. This research was supported in part by the U.S. Department of Energy, the Ministry of Education, Culture, Sports, Science, and Technology of Japan through the Japan-U.S. Cooperative Research Program in High Energy Physics and under Grant-in-Aids ?>for Scientific Research, the Natural Sciences and Engineering Research Council and the National Research Council of Canada, the Russian Federation State Scientific Center Institute for High Energy Physics, and the Ministry of Industry, Science, and New Technologies of the Russian Federation.",

year = "2004",

month = jul,

day = "16",

doi = "10.1103/PhysRevLett.93.031801",

language = "English",

volume = "93",

pages = "031801--1--031801--4",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "3",

}

TY - JOUR

T1 - Improved measurement of the K+ → π+ νν̄ branching ratio

AU - Anisimovsky, V. V.

AU - Artamonov, A. V.

AU - Bassalleck, B.

AU - Bhuyan, B.

AU - Blackmore, E. W.

AU - Bryman, D. A.

AU - Chen, S.

AU - Chiang, I. H.

AU - Christidi, I. A.

AU - Cooper, P. S.

AU - Diwan, M. V.

AU - Frank, J. S.

AU - Fujiwara, T.

AU - Hu, J.

AU - Ivashkin, A. P.

AU - Jaffe, D. E.

AU - Kabe, S.

AU - Kettell, S. H.

AU - Khabibullin, M. M.

AU - Khotjantsev, A. N.

AU - Kitching, P.

AU - Kobayashi, M.

AU - Komatsubara, T. K.

AU - Konaka, A.

AU - Kozhevnikov, A. P.

AU - Kudenko, Yu G.

AU - Kushnirenko, A.

AU - Landsberg, L. G.

AU - Lewis, B.

AU - Li, K. K.

AU - Littenberg, L. S.

AU - Macdonald, J. A.

AU - Mildenberger, J.

AU - Mineev, O. V.

AU - Miyajima, M.

AU - Mizouchi, K.

AU - Mukhin, V. A.

AU - Muramatsu, N.

AU - Nakano, T.

AU - Nomachi, M.

AU - Nomura, T.

AU - Numao, T.

AU - Obraztsov, V. F.

AU - Omata, K.

AU - Patalakha, D. I.

AU - Petrenko, S. V.

AU - Poutissou, R.

AU - Ramberg, E. J.

AU - Redlinger, G.

AU - Sato, T.

AU - Sekiguchi, T.

AU - Shinkawa, T.

AU - Strand, R. C.

AU - Sugimoto, S.

AU - Tamagawa, Y.

AU - Tschirhart, R.

AU - Tsunemi, T.

AU - Vavilov, D. V.

AU - Viren, B.

AU - Yershov, N. V.

AU - Yoshimura, Y.

AU - Yoshioka, T.

N1 - Funding Information: We acknowledge the dedicated effort of the technical staff supporting E949, the Brookhaven C-A Department, and the contributions made by colleagues who participated in E787. This research was supported in part by the U.S. Department of Energy, the Ministry of Education, Culture, Sports, Science, and Technology of Japan through the Japan-U.S. Cooperative Research Program in High Energy Physics and under Grant-in-Aids ?>for Scientific Research, the Natural Sciences and Engineering Research Council and the National Research Council of Canada, the Russian Federation State Scientific Center Institute for High Energy Physics, and the Ministry of Industry, Science, and New Technologies of the Russian Federation.

PY - 2004/7/16

Y1 - 2004/7/16

N2 - The upper kinematic limit for K+→π +νν̄ was observed by experiment E949 at Brookhaven National Laboratory. The new procedure enabled to estimates of the expected background and signal rates inside and outside the signal region. Examination of the signal region for the data set yielded one event with P=227.3±2.7 MeV/c, R=39.2±1.2 cm and E=128.9±3.6 MeV. It was suggested that at the measured central value of the branching ratio, the additional event had a signal to background ratio of 0.9.

AB - The upper kinematic limit for K+→π +νν̄ was observed by experiment E949 at Brookhaven National Laboratory. The new procedure enabled to estimates of the expected background and signal rates inside and outside the signal region. Examination of the signal region for the data set yielded one event with P=227.3±2.7 MeV/c, R=39.2±1.2 cm and E=128.9±3.6 MeV. It was suggested that at the measured central value of the branching ratio, the additional event had a signal to background ratio of 0.9.

UR - http://www.scopus.com/inward/record.url?scp=4344627215&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4344627215&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.93.031801

DO - 10.1103/PhysRevLett.93.031801

M3 - Article

AN - SCOPUS:4344627215

VL - 93

SP - 031801-1-031801-4

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 3

M1 - 031801

ER -

Improved measurement of the K⁺ → π⁺ νν̄ branching ratio

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