Measurement of direct photon emission in K+ → π+ π0γ decay

S. Adler, M. Aoki, M. Ardebili, M. S. Atiya, P. C. Bergbusch, E. W. Blackmore, D. A. Bryman, I. H. Chiang, M. R. Convery, M. V. Diwan, J. S. Frank, J. S. Haggerty, T. Inagaki, M. M. Ito, S. Kabe, S. H. Kettell, Y. Kishi, P. Kitching, M. Kobayashi, T. K. KomatsubaraA. Konaka, Y. Kuno, M. Kuriki, T. F. Kycia, K. K. Li, L. S. Littenberg, J. A. Macdonald, R. A. McPherson, P. D. Meyers, J. Mildenberger, N. Muramatsu, T. Nakano, T. Numao, J. M. Poutissou, R. Poutissou, G. Redlinger, T. Sato, T. Shinkawa, F. C. Shoemaker, R. Soluk, J. R. Stone, R. C. Strand, S. Sugimoto, C. Witzig, Y. Yoshimura

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24 Scopus citations

Abstract

A new measurement of the K+ → π+ π0 decay with significantly higher statistics and improved kinematic constraints was performed using E787 detector and K+ decays at rest. The branching ratio of the direct emission was determined. The decay spectrum indicated that the direct emission amplitude is consistent with being due to purely magnetic contributions comparable to the reducible anomalous contribution.

Original languageEnglish (US)
Pages (from-to)4856-4859
Number of pages4
JournalPhysical review letters
Volume85
Issue number23
DOIs
StatePublished - Dec 4 2000

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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