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

M. Ahmed, J. F. Amann, D. Barlow, K. Black, R. D. Bolton, M. L. Brooks, S. Carius, Y. K. Chen, A. Chernyshev, H. M. Concannon, M. D. Cooper, P. S. Cooper, J. Crocker, J. R. Dittmann, M. Dzemidzic, A. Empl, R. J. Fisk, E. Fleet, W. Foreman, C. A. GagliardiD. Haim, A. Hallin, C. M. Hoffman, G. E. Hogan, E. B. Hughes, E. V. Hungerford, C. C.H. Jui, G. J. Kim, J. E. Knott, D. D. Koetke, T. Kozlowski, M. A. Kroupa, A. R. Kunselman, K. A. Lan, V. Laptev, D. Lee, F. Liu, R. W. Manweiler, R. Marshall, B. W. Mayes, R. E. Mischke, B. M.K. Nefkens, L. M. Nickerson, P. M. Nord, M. A. Oothoudt, J. N. Otis, R. Phelps, L. E. Piilonen, C. Pillai, L. Pinsky, M. W. Ritter, C. Smith, T. D.S. Stanislaus, K. M. Stantz, J. J. Szymanski, L. Tang, W. B. Tippens, R. E. Tribble, X. L. Tu, L. A. Van Ausdeln, W. H. Von Witch, D. Whitehouse, C. Wilkinson, B. Wright, S. C. Wright, Y. Zhang, K. O.H. Ziock

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Abstract

The MEGA experiment, which searched for the muon- and electron-number violating decay μ +→e + γ, is described. The spectrometer system, the calibrations, the data taking procedures, the data analysis, and the sensitivity of the experiment are discussed. The most stringent upper limit on the branching ratio, B(μ + →e + γ)<1.2×10 -11 with 90% confidence, is derived from a likelihood analysis.

Original languageEnglish (US)
Article number112002
JournalPhysical Review D
Volume65
Issue number11
DOIs
StatePublished - Dec 1 2002

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

Ahmed, M., Amann, J. F., Barlow, D., Black, K., Bolton, R. D., Brooks, M. L., Carius, S., Chen, Y. K., Chernyshev, A., Concannon, H. M., Cooper, M. D., Cooper, P. S., Crocker, J., Dittmann, J. R., Dzemidzic, M., Empl, A., Fisk, R. J., Fleet, E., Foreman, W., ... Ziock, K. O. H. (2002). Search for the lepton-family-number nonconserving decay μ +→e +γ. Physical Review D, 65(11), [112002]. https://doi.org/10.1103/PhysRevD.65.112002