Experimental Test of Higher-Order QED and a Search for Excited Muon States

W.T. Ford,A.L. Read,Jg Smith,Andrea Carlo Marini,Im Peruzzi,M. Piccolo,F. Ronga,L. Baksay,Hr Band,W. Faissler,M. W. Gettner,G. P. Goderre,B. Gottschalk,R B Hurst,O Meyer,J. H. Moromisato,W. D. Shambroom,E. von Goeler,Roy Weinstein,J. V. Allaby,W. W. Ash,G. B. Chadwick,S. H. Clearwater,R. Coombes,Y. Goldschmidt-Clermont,H S Kaye,Kwong Lau,R. E. Leedy,R Messner,S. J. Michalowski,k Rich,D.M. Ritson,L. J. Rosenberg,D. E. Wiser,R.W. Zdarko,D E Groom,Haena Lee,E. C. Loh,M C Delfino,B. K. Heltsley,J. R. Johnson,T.L. Lavine,T. Maruyama,R. Prepost

Experimental Test of Higher-Order QED and a Search for Excited Muon States

1983

The reactions e/sup +/e/sup -/..--> mu../sup +/..mu../sup -/..gamma gamma.. and e/sup +/e/sup -/..--> mu../sup +/..mu../sup -/..gamma.. have been studied at ..sqrt..s = 29 GeV with the MAC detector at the SLAC storage ring. The measured cross sections, charge asymmetry, and invariant-mass distributions are in good agreement with the predictions of QED theory. Limits are derived for the production of excited muon states.

Keywords:

Pair production
Muon
Condensed matter physics
Storage ring
Nuclear physics
Annihilation
Electron–positron annihilation
Excited state
Physics
Spectral line
Asymmetry
Particle physics

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