New Limit for the Family-Number Non-conserving Decay mu+ to e+gamma
MEGA Collaboration, 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. Stanislaus, K. M. Stantz, J. J. Szymanski, R. E. Tribble, X. L. Tu, L. A. Van Ausdeln, W. H. von Witsch, S. C. Wright, K. O. H. Ziock
Abstract
An experiment has been performed to search for the muon- and electron-number non-conserving decay mu+ to e+gamma. The upper limit for the branching ratio to be GAMMA(mu+ to e+gamma)/GAMMA(mu+ to e+nunubar) < 1.2e-11 with 90% confidence.
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