Measurement of the muonic branching fractions of the Υ(1S) and Υ(3S)

Author(s): Chen, W; McIlwain, RL; Miller, DH; Ng, CR; Shibata, EI; Yao, W; Thorndike, EH; Alam, MS; Katayama, N; Kim, IJ; Li, WC; Lou, XC; Sun, CR; Bortoletto, D; Goldberg, M; Horwitz, N; Mestayer, MD; Moneti, GC; Sharma, V; Shipsey, IP; Skwarnicki, T; Csorna, SE; Letson, T; Brock, IC; Ferguson, T; Artuso, M; Bebek, C; Berkelman, K; Blucher, E; Byrd, J; Cassel, DG; Cheu, E; Coffman, DM; Crawford, G; DeSalvo, R; DeWire, JW; Drell, PS; Ehrlich, R; Galik, RS; Gittelman, B; Gray, SW; Halling, AM; Hartill, DL; Heltsley, BK; Kandaswamy, J; Kowalewski, R; Kreinick, DL; Kubota, Y; Lewis, JD; Mistry, NB; Mueller, J; Namjoshi, R; Nandi, S; Nordberg, E; O'Grady, C; Peterson, D; Pisharody, M; Riley, D; Sapper, M; Silverman, A; Stone, S; Worden, H; Worris, M; Sadoff, AJ | Abstract: Using the CLEO detector at the Cornell Electron Storage Ring, we have measured the muonic branching fractions B of the (1S) and (3S) to be (2.520.070.07)% and (2.020.190.33)%, respectively. © 1989 The American Physical Society.