Phys. Rev. D 79, 092004 (2009) [27 pages]
Study of the decay K+-->pi+nu[overline nu ] in the momentum region 140<Ppi<199 MeV/c
Abstract
References (64)
Citing Articles
A. V. Artamonov, 1 B. Bassalleck, 2 B. Bhuyan, 3 E. W. Blackmore, 4 D. A. Bryman, 5 S. Chen, 6,4 I.-H. Chiang, 3 I.-A. Christidi, 7 P. S. Cooper, 8 M. V. Diwan, 3 J. S. Frank, 3 T. Fujiwara, 9 J. Hu, 4 J. Ives, 5 D. E. Jaffe, 3 S. Kabe, 10 S. H. Kettell, 3 M. M. Khabibullin, 11 A. N. Khotjantsev, 11 P. Kitching, 12 M. Kobayashi, 10 T. K. Komatsubara, 10 A. Konaka, 4 A. P. Kozhevnikov, 1 Yu. G. Kudenko, 11 A. Kushnirenko, 8 L. G. Landsberg, 1 B. Lewis, 2 K. K. Li, 3 L. S. Littenberg, 3 J. A. Macdonald, 4 J. Mildenberger, 4 O. V. Mineev, 11 M. Miyajima, 13 K. Mizouchi, 9 V. A. Mukhin, 1 N. Muramatsu, 14 T. Nakano, 14 M. Nomachi, 15 T. Nomura, 9 T. Numao, 4 V. F. Obraztsov, 1 K. Omata, 10 D. I. Patalakha, 1 S. V. Petrenko, 1 R. Poutissou, 4 E. J. Ramberg, 8 G. Redlinger, 3 T. Sato, 10 T. Sekiguchi, 10 T. Shinkawa, 16 R. C. Strand, 3 S. Sugimoto, 10 Y. Tamagawa, 13 R. Tschirhart, 8 T. Tsunemi, 10 D. V. Vavilov, 1 B. Viren, 3 Zhe Wang, 6,3 N. V. Yershov, 11 Y. Yoshimura, 10 and T. Yoshioka10
(E949 Collaboration)
1Institute for High Energy Physics, Protvino, Moscow Region, 142 280, Russia
2Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico 87131, USA
3Brookhaven National Laboratory, Upton, New York 11973, USA
4TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 2A3
5Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
6Department of Engineering Physics, Tsinghua University, Beijing 100084, China
7Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794, USA
8Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
9Department of Physics, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
10High Energy Accelerator Research Organization (KEK), Oho, Tsukuba, Ibaraki 305-0801, Japan
11Institute for Nuclear Research RAS, 60 October Revolution Prospect 7a, 117312 Moscow, Russia
12Centre for Subatomic Research, University of Alberta, Edmonton, Canada T6G 2N5
13Department of Applied Physics, Fukui University, 3-9-1 Bunkyo, Fukui, Fukui 910-8507, Japan
14Research Center for Nuclear Physics, Osaka University, 10-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
15Laboratory of Nuclear Studies, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
16Department of Applied Physics, National Defense Academy, Yokosuka, Kanagawa 239-8686, Japan
Received 2 March 2009; published 21 May 2009
Experiment E949 at Brookhaven National Laboratory has observed three new events consistent with the decay K+-->pi+nu[overline nu ] in the pion momentum region 140<Ppi<199 MeV/c in an exposure of 1.71×1012 stopped kaons with an estimated total background of 0.93±0.17(stat)-0.24+0.32(syst) events. This brings the total number of observed K+-->pi+nu[overline nu ] events to seven. Combining this observation with previous results, assuming the pion spectrum predicted by the standard model, results in a branching ratio of [script B](K+-->pi+nu[overline nu ])=(1.73-1.05+1.15)×10-10. An interpretation of the results for alternative models of the decay K+-->pi++nothing is also presented.
©2009 The American Physical Society
| URL: |
http://link.aps.org/doi/10.1103/PhysRevD.79.092004
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| DOI: |
10.1103/PhysRevD.79.092004 |
| PACS: |
13.20.Eb;
14.80.-j
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REFERENCES (64)
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