1997/06/11 by Frank Würthwein, Würthwein, Frank
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #hep-ex
paper · pdf · doi:10.48550/arxiv.hep-ex/9706010
6 pages, LaTex
arxiv created 1997/06/11 · arxiv updated 2009/11/30
Using 3.3 Million B B pairs accumulated with the CLEO detector CLEO has measured \cal B(B0→ K+π-) = (1.5+ 0.5-0.4± 0.1± 0.1)× 10-5, \cal B(B+→ K0π+) = (2.3+1.1-1.0± 0.2± 0.2)× 10-5, and \cal B(B+→ η'K+) = (7.8+ 2.7-2.2± 1.0)× 10-5. These constitute the first observations of exclusive B decays to charmless hadronic final states. Furthermore, a measurement of \cal B(B+→ h+π0) = (1.6+ 0.6 +0.3-0.5 -0.2± 0.1)× 10-5, as well as upper limits on various other B decays to two charmless pseudoscalar mesons are presented. In particular, an upper limit of \cal B(B0→ π+π-) < 1.5× 10-5 @ 90%C.L. is placed. All of these results are still preliminary, and averaging over charge conjugate modes is always implied.