Observation of bso→K+K- and measurements of branching fractions of charmless two-body decays of B0 and Bs0 mesons in p_p Collisions at s=1.96TeV
Journal
Physical Review Letters
Journal Volume
97
Journal Issue
21
Date Issued
2006
Author(s)
Abulencia, A. et al. (CDF Collaboration)
Abstract
We search for decays of the type B(s)0-->h+ h'- (where h,h' = K or pi) in 180 pb(-1) of pp collisions collected at the Tevatron by the upgraded Collider Detector at Fermilab. We report the first observation of the new mode B(s)0-->K+ K- with a yield of 236+/-32 events, corresponding to (fs/fd) x B(B(s)0-->K+ K-)/B(B0-->K+ pi-) = 0.46+/-0.08stat+/-0.07syst, where fs/fd is the ratio of production fractions of B(s)0 and B0. We find results in agreement with world averages for the B0 modes, and set the following new limits at 90% C.L.: B(B(s)0-->K- pi+) pi+ pi-) < 1.7 x 10(-6).
Type
journal article