Title

Observation of anomalous production of muon pairs in e+e- annihilation into four-lepton final states

Authors

Y. H. Ho, University of Rochester
Y. Kurihara, High Energy Accelerator Research Organization, Tsukuba
T. Omori, High Energy Accelerator Research Organization, Tsukuba
P. Auchincloss, University of Rochester
D. Blanis, University of Rochester
A. Bodek, University of Rochester
H. Budd, University of Rochester
M. Dickson, University of Rochester
S. Eno, University of Rochester
C. A. Fry, University of Rochester
H. Harada, University of Rochester
B. J. Kim, University of Rochester
Y. K. Kim, University of Rochester
T. Kumita, University of Rochester
T. Mori, University of Rochester
S. L. Olsen, University of Rochester
N. M. Shaw, University of Rochester
A. Sill, University of Rochester
E. H. Thorndike, University of Rochester
K. Ueno, University of Rochester
C. Velissaris, University of Rochester
G. Watts, University of Rochester
H. W. Zheng, University of Rochester
K. Abe, High Energy Accelerator Research Organization, Tsukuba
Y. Fujii, High Energy Accelerator Research Organization, Tsukuba
Y. Higashi, High Energy Accelerator Research Organization, Tsukuba
S. K. Kim, High Energy Accelerator Research Organization, Tsukuba
A. Maki, High Energy Accelerator Research Organization, Tsukuba
T. Nozaki, High Energy Accelerator Research Organization, Tsukuba
H. Sagawa, High Energy Accelerator Research Organization, Tsukuba
Y. Sakai, High Energy Accelerator Research Organization, Tsukuba
Y. Sugimoto, High Energy Accelerator Research Organization, Tsukuba
Y. Takaiwa, High Energy Accelerator Research Organization, Tsukuba

Document Type

Article

Publication Date

7-26-1990

Abstract

We report results of a study of four-lepton final states produced in e+e- collisions at center-of-mass energies from 50 to 61.4 GeV using the AMY detector at the TRISTAN collider. For the cases where two or three charged tracks are produced at large angles relative to the beam direction, the cross sections agree with QED. However, we observe an excess of e+e-→e+e-μ+ μ- events with four tracks at wide angles and with dimuon mass less than 1.0 GeV/c2. © 1990.

Publication Source (Journal or Book title)

Physics Letters B

First Page

573

Last Page

579

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