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arXiv · hep-ex/9905013

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
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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+_nu_nubar) < 1.2e-11 with 90% confidence.

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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. 1999-05-07. New Limit for the Family-Number Non-conserving Decay mu+ to e+_gamma. https://doi.org/10.1103/physrevlett.83.1521

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