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Observation of anomalous production of muon pairs in e+e− annihilation into four-lepton final states
Authors
Y. Ho,Y. Kurihara
T. Omori,P. Auchincloss,D. Blanis,A. Bodek,H. Budd,M. Dickson,Sarah Eno,C. Fry,E. Hartouni,B.J. Kim,Y.K. Kim,T. Kumita,T. Mori,S.L. Olsen,M. Shapiro,A. Sill,J. Bennett,Yutaka Akiyama,C. Velissaris,G. Watts,H. Zheng,K. Abe,Y. Fujii,Yukihiro Higashi,S. Korpar,A. Maki,T. Nozaki,H. Sagawa,Y. Sakai,Y. Sugimoto,Y. Takaiwa,K. Terashi,R. Walker,R. Imlay,P. Kirk,J.N. Lim,R.R. McNeil,Bill Metcalf,S.S. Myung,C. Cheng,M. Lindner,J. Li,Y.K. Li,M.H. Ye,Y. Zhu,A. Abashian,K. Gotow,K.P. Hu,E. Low,T. Masubuchi,L. Piilonen,K.L. Sterner,P. Lukens,C. Rosenfeld,A.T.M. Wang,Sarah Wilson,M. Frautschi,H. Kagan,V. Kartvelishvili,C. Trahern,R.E. Breedon,G.N. Kim,W. Ko,G. Alverson,K. Maeshima,R. Malchow,K. Śliwa,David Stuart,F. Kajino,D. Perticone,R. Poling,M. Togawa,Y. Ishi,K. Miyano,K. Miyabayashi,T. Sasaki,Y. Yamashita,A. Bacala,J. Liu,I.H. Park,F. Sannes,M. Sasaki,R. Stone,J. Vinson,H. Ichinose,S. Kobayashi,S. Kowalski,P. Kapusta,H.J. Kim,M. Lee,Dong Han,E.J. Kim,C. Glasman,Takayuki Kojima,S. Matsumoto,R. Tanaka,Yoshio Yamagishi,T. Yasuda,T. Ishizuka,Kouji Ohta,Marjorie Shapiro,Koji Terashi,Rodney Walker,Manfred Lindner,Richard Lander,Cameron Bravo,Kevin Lannon,K. Sliwa
+108 authors
,Claudia GlasmanJournal
Published
Jul 1, 1990
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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.
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