Title

Search for the substructure of leptons in high energy QED processes at tristan

Authors

S. K. Kim, Korea University
H. J. Kim, Korea University
J. S. Kang, Korea University
M. H. Lee, Korea University
S. S. Myung, Korea University
A. Bacala, Korea University
R. Imlay, Louisiana State University
P. Kirk, Louisiana State University
J. Lim, Louisiana State University
R. R. McNeil, Louisiana State University
W. Metcalf, Louisiana State University
C. P. Cheng, Institute of High Energy Physics Chinese Academy of Science
J. Li, Institute of High Energy Physics Chinese Academy of Science
Y. K. Li, Institute of High Energy Physics Chinese Academy of Science
Z. P. Mao, Institute of High Energy Physics Chinese Academy of Science
Y. T. Xu, Institute of High Energy Physics Chinese Academy of Science
Y. C. Zhu, Institute of High Energy Physics Chinese Academy of Science
A. Abashian, Virginia Polytechnic Institute and State University
K. Gotow, Virginia Polytechnic Institute and State University
E. H. Low, Virginia Polytechnic Institute and State University
M. E. Mattson, Virginia Polytechnic Institute and State University
F. Naito, Virginia Polytechnic Institute and State University
L. Piilonen, Virginia Polytechnic Institute and State University
K. L. Sterner, Virginia Polytechnic Institute and State University
S. Lusin, University of South Carolina
C. Rosenfeld, University of South Carolina
A. T.M. Wang, University of South Carolina
S. Wilson, University of South Carolina
M. Frautschi, The Ohio State University
H. Kagan, The Ohio State University
R. Kass, The Ohio State University
C. G. Trahern, The Ohio State University
Winston Ko, University of California, Davis

Document Type

Article

Publication Date

6-15-1989

Abstract

QED processes up to O(α4) have been studied at center-of-mass energies between 50 and 57 GeV using the AMY detector at TRISTAN. A possible substructure of the electron and muon is investigated in terms of chiral invariant contact interactions and also in terms of excited lepton production. The differential cross section data for e+e-→e+e- are consistent with the standard model at a confidence level of only 3.5%. From the absence of excited lepton production, we establish new upper limits on the coupling to excited electrons of mass up to 56 GeV/c2 and on the coupling to excited muons of mass up to 52 GeV/c2. © 1989.

Publication Source (Journal or Book title)

Physics Letters B

First Page

476

Last Page

484

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