Phys. Rev. D
65,
052009
(2002)
[7 pages]
Search for the rare decay K+→π+γ
S. Adler et al. (E787 Collaboration)
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S. Adler1, M. Aoki6,*, M. Ardebili5, M. S. Atiya1, A. O. Bazarko5, P. C. Bergbusch6,8, E. W. Blackmore6, D. A. Bryman6,8, I-H. Chiang1, M. R. Convery5,†, M. V. Diwan1, J. S. Frank1, J. S. Haggerty1, T. Inagaki3, M. M. Ito5,‡, V. Jain1, S. Kabe3, M. Kazumori3,§, S. H. Kettell1, P. Kitching7, M. Kobayashi3, T. K. Komatsubara3, A. Konaka6, Y. Kuno3,**, M. Kuriki3, T. F. Kycia1,††, K. K. Li1, L. S. Littenberg1, J. A. Macdonald6, R. A. McPherson5,‡‡, P. D. Meyers5, J. Mildenberger6, M. Miyajima2, N. Muramatsu3,§,a, T. Nakano4, C. Ng1,b, J. Nishide2, T. Numao6, A. Otomo3,§, J.-M. Poutissou6, R. Poutissou6, G. Redlinger6,c, T. Sasaki4, T. Sato3, T. Shinkawa3,d, F. C. Shoemaker5, R. Soluk7, J. R. Stone5, R. C. Strand1, S. Sugimoto3, Y. Tamagawa2, C. Witzig1, and Y. Yoshimura3 (E787 Collaboration)
1Brookhaven National Laboratory, Upton, New York 11973
2Department of Applied Physics, Fukui University, 3-9-1 Bunkyo, Fukui, Fukui 910-8507, Japan
3High Energy Accelerator Research Organization (KEK), Oho, Tsukuba, Ibaraki 305-0801, Japan
4RCNP, Osaka University, 10-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
5Joseph Henry Laboratories, Princeton University, Princeton, New Jersey 08544
6TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 2A3
7Centre for Subatomic Research, University of Alberta, Edmonton, Alberta, Canada T6G 2N5
8Department of Physics and Astronomy, University of British Columbia, Vancouver, BC, Canada V6T 1Z1
Received 1 August 2001; published 14 February 2002
We have performed a search for the angular-momentum forbidden decay K+→π+γ with the E787 detector at BNL. No events were observed in the π+ kinematic region around 227 MeV/c. An upper limit on the branching ratio for the decay is determined to be 3.6×10-7 at 90% confidence level.
© 2002 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.65.052009
DOI:
10.1103/PhysRevD.65.052009
*Now at KEK, Oho, Tsukuba, Ibaraki 305-0801, Japan. †Now at SLAC, Menlo Park, CA 94025. ‡Now at Thomas Jefferson National Accelerator Facility, Newport News, VA 23606. §Also at Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan. **Now at Department of Physics, Osaka University, Osaka 560-0043, Japan. ††Deceased. ‡‡Now at Department of Physics and Astronomy, University of Victoria, Victoria, BC, Canada V8W 3P6. aNow at Japan Atomic Energy Research Institute, Sayo, Hyogo 679-5198, Japan. bAlso at Department of Physics and Astronomy, State University of New York at Stony Brook, Stony Brook, NY 11794-3800. cNow at BNL, Upton, NY 11973. dNow at the National Defense Academy of Japan, Yokosuka, Kanagawa 239-8686, Japan.
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