Upper Limit for the Decay <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi>μ</mi></mrow><mrow><mo>+</mo></mrow></msup></mrow><mo>→</mo><mrow><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup></mrow><mi>γ</mi></math></span>

J. D. Bowman; M. D. Cooper; M. Hamm; C. M. Hoffman; R. E. Mischke; D. E. Nagle; J. S. Sarracino; P. A. Thompson; H. L. Anderson; W. W. Kinnison; H. S. Matis; S. C. Wright; R. L. Carrington; R. A. Eichler; R. Hofstadter; E. B. Hughes; T. McPharlin

doi:10.1103/PhysRevLett.42.556

Upper Limit for the Decay $μ^{+} \to e^{+} γ$

J. D. Bowman, M. D. Cooper, M. Hamm, C. M. Hoffman, R. E. Mischke, D. E. Nagle, J. S. Sarracino, P. A. Thompson, H. L. Anderson, W. W. Kinnison, H. S. Matis, S. C. Wright, R. L. Carrington, R. A. Eichler, R. Hofstadter, E. B. Hughes, and T. McPharlin

Phys. Rev. Lett. 42, 556 – Published 26 February 1979

Abstract

An examination of 3.6× $10^{10}$ $μ^{+}$ decays yields an improved upper limit for the branching ratio $\frac{Γ (μ^{+} \to e^{+} γ)}{Γ (μ^{+} \to e^{+} ν_{e} {\bar{ν}}_{μ})} < 1.9 \times 10^{- 10}$ with 90% confidence.

Received 22 December 1978

DOI:https://doi.org/10.1103/PhysRevLett.42.556

Authors & Affiliations

J. D. Bowman, M. D. Cooper, M. Hamm, C. M. Hoffman, R. E. Mischke, D. E. Nagle, J. S. Sarracino, and P. A. Thompson^*

Los Alamos Scientific Laboratory, University of California, Los Alamos, New Mexico 87545

H. L. Anderson^†, W. W. Kinnison^‡, H. S. Matis^§, and S. C. Wright

The Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637

R. L. Carrington^‡, R. A. Eichler^∥, R. Hofstadter, E. B. Hughes, and T. McPharlin^¶

High Energy Physics Laboratory and Physics Department, Stanford University, Stanford, California 94305

^*Present address: Department of Physics, University of Rochester, Rochester, N. Y. 14627.
^†Also at Los Alamos Scientific Laboratory, Los Alamos, N. M. 87545.
^‡Submitted in partial fulfillment of Ph.D. requirements.
^§Present address: MP Division, Los Alamos Scientific Laboratory, Los Alamos, N. M. 87545.
^∥Present address: DESY, Notkestieg 1, D-2 Hamburg 52, Germany.
^¶Present address: Systems Control Inc., 1801 Page Mill Road, Palo Alto, Calif. 94304.