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

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