Charmless Hadronic B Decays at CLEO

Gao, Yongsheng; Würthwein, Frank

Charmless Hadronic B Decays at CLEO

Authors

Description

The CLEO collaboration has studied two-body charmless hadronic decays of $B$ mesons into final states containing two pseudo-scalar mesons, or a pseudo-scalar and a vector meson. We summarize and discuss results presented during the winter/spring 1999 conference season, and provide a brief outlook towards future attractions to come. In particular, CLEO presented preliminary results on the decays $B^\pm \to π^\pmρ^0$ ($Br(B^\pm \to π^\pmρ^0) = (1.5 \pm 0.5 \pm 0.4)\times 10^{-5}$), $B\to π^\pmρ^\mp$ ($Br(B\to π^\pmρ^\mp)=(3.5^{+1.1}_{-1.0}\pm 0.5)\times 10^{-5}$), $B\to π^\pm K^{\star\mp}$ ($Br(B\to π^\pm K^{\star\mp}) = (2.2^{+0.8+0.4}_{-0.6-0.5})\times 10^{-5}$), and $B^\pm \to K^\pm π^0$ ($Br(B^\pm \to K^\pm π^0) = (1.5 \pm 0.4 \pm 0.3) \times 10^{-5}$) at DPF99, APS99, APS99, and ICHEP98 respectively. None of these decays had been observed previously. The first two of these constitute the first observation of hadronic $b\to u$ transitions. In addition, CLEO presented preliminary updates on a large number of previously published branching fractions and upper limits.
DPF99 Proceedings. Includes all new results from CLEO for ICHEP98, DPF99, and APS99 Final version. Fixed typos, expanded section on Neubert-Rosner bound, added references, added comment on R-parity violation