New limit for the lepton-family-number nonconserving decay μ+→ e+γ

M. L. Brooks, Y. K. Chen, M. D. Cooper, P. S. Cooper, M. Dzemidzic, A. Empl, C. A. Gagliardi, G. E. Hogan, E. B. Hughes, E. V. Hungerford, C. C.H. Jui, J. E. Knott, D. D. Koetke, M. A. Kroupa, K. A. Lan, R. Manweiler, B. W. Mayes, R. E. Mischke, L. E. Piilonen, T. D.S. StanislausK. M. Stantz, J. J. Szymanski, R. E. Tribble, X. L. Tu, L. A. Van Ausdeln7, W. H. von Witsch3, S. C. Wright, K. O.H. Ziock

Research output: Contribution to journalArticle

573 Scopus citations


An experiment has been performed to search for the muon- and electron-number nonconserving decay μ+→ e+γ. The upper limit for the branching ratio is found to be Γ(μ+→ e+γ)/Γ(μ+→ e+νν ⊯) < 1.2 × 10-11with 90% confidence.

Original languageEnglish (US)
Pages (from-to)1521-1524
Number of pages4
JournalPhysical Review Letters
Issue number8
StatePublished - Jan 1 1999


ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Brooks, M. L., Chen, Y. K., Cooper, M. D., Cooper, P. S., Dzemidzic, M., Empl, A., Gagliardi, C. A., Hogan, G. E., Hughes, E. B., Hungerford, E. V., Jui, C. C. H., Knott, J. E., Koetke, D. D., Kroupa, M. A., Lan, K. A., Manweiler, R., Mayes, B. W., Mischke, R. E., Piilonen, L. E., ... Ziock, K. O. H. (1999). New limit for the lepton-family-number nonconserving decay μ+→ e+γ. Physical Review Letters, 83(8), 1521-1524.