Search for the decay K+ → π+γγ in the π+ momentum region P > 213 MeV/c

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, D. E. Jaffe, S. Kabe, S. H. Kettell, M. M. Khabibullin, A. N. Khotjantsev, P. Kitching, M. KobayashiT. 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

We have searched for the K+→π+γγ decay in the kinematic region with π+ momentum close to the end point. No events were observed, and the 90% confidence-level upper limit on the partial branching ratio was obtained, B(K+→π +γγ,P>213 MeV/c)<8.3×10-9 under the assumption of chiral perturbation theory including next-to-leading order "unitarity" corrections. The same data were used to determine an upper limit on the K+→π+γ branching ratio of 2.3×10-9 at the 90% confidence level.

Original languageEnglish
Pages (from-to)192-199
Number of pages8
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume623
Issue number3-4
DOIs
Publication statusPublished - Sep 15 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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    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., Jaffe, D. E., Kabe, S., Kettell, S. H., Khabibullin, M. M., Khotjantsev, A. N., Kitching, P., ... Yoshioka, T. (2005). Search for the decay K+ → π+γγ in the π+ momentum region P > 213 MeV/c. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 623(3-4), 192-199. https://doi.org/10.1016/j.physletb.2005.07.057