Improved measurement of the pseudoscalar decay constant fDs Article

Chada, M, Chan, S, Eigen, G et al. (1998). Improved measurement of the pseudoscalar decay constant fDs . PHYSICAL REVIEW D, 58(3), 0320021-03200210. 10.1103/PhysRevD.58.032002

cited authors

  • Chada, M; Chan, S; Eigen, G; Miller, JS; O'Grady, C; Schmidtler, M; Urheim, J; Weinstein, AJ; Würthwein, F; Bliss, DW; Masek, G; Paar, HP; Prell, S; Sharma, V; Asner, DM; Gronberg, J; Hill, TS; Lange, DJ; Morrison, RJ; Nelson, HN; Nelson, TK; Roberts, D; Ryd, A; Balest, R; Behrens, BH; Ford, WT; Park, H; Roy, J; Smith, JG; Alexander, JP; Baker, R; Bebek, C; Berger, BE; Berkelman, K; Bloom, K; Boisvert, V; Cassel, DG; Crowcroft, DS; Dickson, M; von Dombrowski, S; Drell, PS; Ecklünd, KM; Ehrlich, R; Foland, AD; Gaidarev, P; Gibbons, L; Gittelman, B; Gray, SW; Hartill, DL; Heltsley, BK; Hopman, PI; Kandaswamy, J; Kim, PC; Kreinick, DL; Lee, T; Liu, Y; Mistry, NB; Ng, CR; Nordberg, E; Ogg, M; Patterson, JR; Peterson, D; Riley, D; Soffer, A; Valant-Spaight, B; Ward, C; Athanas, M; Avery, P; Jones, CD; Lohner, M; Patton, S; Prescott, C; Yelton, J; Zheng, J; Brandenburg, G; Briere, RA; Ershov, A; Gao, YS; Kim, DYJ; Wilson, R; Yamamoto, H; Browder, TE; Li, Y; Rodriguez, JL; Bergfeld, T; Eisenstein, BI; Ernst, J; Gladding, GE; Gollin, GD; Hans, RM; Johnson, E; Karliner, I; Marsh, MA; Palmer, M; Selen, M; Thaler, JJ; Edwards, KW; Bellerive, A; Janicek, R; MacFarlane, DB

authors

abstract

  • We present a new determination of fDs using 5 million e+e-→cc̄ events obtained with the CLEO II detector. Our value is derived from our new measured ratio Γ(D+s → μ+ν)/Δ(D+s → φπ+) = 0.173 ± 0.023 ± 0.035. Using ß(D+s → φπ+) = (3.6 ± 0.9)%, we extract fDs = (280 ± 19 ± 28 ± 34) MeV. We compare this result with various model calculations.

publication date

  • August 1, 1998

published in

Digital Object Identifier (DOI)

start page

  • 0320021

end page

  • 03200210

volume

  • 58

issue

  • 3