Precise measurement of the π+ → π0e + ν branching ratio

D. Počanić, E. Frlež, V. A. Baranov, W. Bertl, Ch Brönnimann, M. Bychkov, J. F. Crawford, M. Daum, N. V. Khomutov, A. S. Korenchenko, S. M. Korenchenko, T. Kozlowski, N. P. Kravchuk, N. A. Kuchinsky, W. Li, R. C. Minehart, D. Mzhavia, Barry Ritchie, S. Ritt, A. M. RozhdestvenskyV. V. Sidorkin, L. C. Smith, I. Supek, Z. Tsamalaidze, B. A. VanDevender, Y. Wang, H. P. Wirtz, K. O H Ziock

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Abstract

The rare π+→π0e+v (πβ) decay branching ratio was calculated using a large acceptance calorimeter and a stopped pion beam. The branching ratio was evaluated by normalizing the number of observed πβ decays to the number of observed π+→e+v(πe2) decays. The PIBETA experiment, which is a program of precise measurements of the rare pion and muon decays, was performed. The results confirmed the validity of the radiative corrections for the process at the level of 4σexp.

Original languageEnglish (US)
Pages (from-to)181803-1-181803-4
JournalPhysical Review Letters
Volume93
Issue number18
DOIs
StatePublished - Oct 29 2004

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Počanić, D., Frlež, E., Baranov, V. A., Bertl, W., Brönnimann, C., Bychkov, M., Crawford, J. F., Daum, M., Khomutov, N. V., Korenchenko, A. S., Korenchenko, S. M., Kozlowski, T., Kravchuk, N. P., Kuchinsky, N. A., Li, W., Minehart, R. C., Mzhavia, D., Ritchie, B., Ritt, S., ... Ziock, K. O. H. (2004). Precise measurement of the π+ → π0e + ν branching ratio. Physical Review Letters, 93(18), 181803-1-181803-4. https://doi.org/10.1103/PhysRevLett.93.181803