Measurement of B→ρlv decay and Article

Behrens, BH, Ford, WT, Gritsan, A et al. (2000). Measurement of B→ρlv decay and . PHYSICAL REVIEW D, 61(5), 1-19.

cited authors

  • Behrens, BH; Ford, WT; Gritsan, A; Krieg, H; Roy, J; Smith, JG; Alexander, JP; Baker, R; Bebek, C; Berger, BE; Berkelman, K; Boisvert, V; Cassel, DG; Crowcroft, DS; Dickson, M; Von Dombrowski, S; Drell, PS; Ecklund, KM; Ehrlich, R; Foland, AD; Gaidarev, P; Gibbons, L; Gittelman, B; Gray, SW; Hartill, DL; Heltsley, BK; Hopman, PI; Kreinick, DL; Lee, T; Liu, Y; Meyer, TO; Mistry, NB; Ng, CR; Nordberg, E; Ogg, M; Patterson, JR; Peterson, D; Riley, D; Thayer, JG; Thies, PG; Valant-Spaight, B; Warburton, A; Ward, C; Athanas, M; Avery, P; Jones, CD; Lohner, M; Prescott, C; Rubiera, AI; Yelton, J; Zheng, J; Brandenburg, G; Briere, RA; Ershov, A; Gao, YS; Kim, DYJ; Wilson, R; Browder, TE; Li, Y; Rodriguez, JL; Yamamoto, H; Bergfeld, T; Eisenstein, BI; Ernst, J; Gladding, GE; Gollin, GD; Hans, RM; Johnson, E; Karliner, I; Marsh, MA; Palmer, M; Plager, C; Sedlack, C; Selen, M; Thaler, JJ; Williams, J; Edwards, KW; Bellerive, A; Janicek, R; Patel, PM; Sadoff, AJ; Ammar, R; Baringer, P; Bean, A; Besson, D; Coppage, D; Davis, R; Kotov, S; Kravchenko, I; Kwak, N; Zhao, X; Zhou, L; Anderson, S; Frolov, VV; Kubota, Y; Lee, SJ; Mahapatra, R; O'Neill, JJ; Poling, R; Riehle, T

authors

abstract

  • Using a sample of 3.3×106 Y(4S)→BB̄ events collected with the CLEO II detector at the Cornell Electron Storage Ring (CESR), we measure B(B→ρlv), |Vub|, and the partial rate (ΔΓ) in three bins of q2≡(pB -pρ)2. We find B(B0→ρ-l+v)=(2.69±0.41 -0.40+0.35±0.50)×10-4, |Vub|=(3.23±0.24-0.26+0.23 ±0.58)×10-3, ΔΓ(02<7 GeV2/c4)=(7.6±3.0-1.2 +0.9±3.0)×10-2 ns-1, ΔΓ(72<14 GeV2/c4)=(4.8 ±2.9-0.8+0.7±0.7)×10-2 ns-1, and ΔΓ(142<21 GeV2/c4)=(7.1±2.1-1.1 +0.9±0.6)×10-2 ns-1. Here, l=e or μ, but not both, and the errors are statistical, systematic, and theoretical. The method is sensitive primarily to B→ρlv decays with leptons in the energy range above 2.3 GeV. Averaging with the previously published CLEO results for B→ρlv, we obtain B(B0→ρ-l+v)=(2.57±0.29 -0.46+0.33±0.41)×10-4 and |Vub|=(3.25 ±0.14-0.29+0.21±0.55)×10-3. ©2000 The American Physical Society.

publication date

  • March 1, 2000

published in

start page

  • 1

end page

  • 19

volume

  • 61

issue

  • 5