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

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


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
Pages (from-to)4856-4859
Number of pages4
JournalPhysical review letters
Issue number23
Publication statusPublished - 2000 Dec 4
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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