First observations and measurements of the branching fractions of the B̄s0→D +D -, B̄s0→Ds+D - and B̄s0→D0D ̄0 decays are presented using 1.0 fb -1 of data collected by the LHCb experiment. These branching fractions are normalized to those of B ̄0→D +D -, B0→D -Ds+ and B -→D0Ds- , respectively. An excess of events consistent with the decay B ̄0→D0D ̄0 is also seen, and its branching fraction is measured relative to that of B -→D0Ds-. Improved measurements of the branching fractions B(B̄s0→Ds+Ds-) and B(B -→D0Ds-) are reported, each relative to B(B0→D -Ds+). The ratios of branching fractions are B(B̄s0→D +D -)B(B ̄0→D +D -)=1.08±0.20±0.10, B(B̄s0→Ds+D -)B(B0→D -Ds+)=0.050±0.008±0.004, B(B̄s0→D0D ̄0)B(B -→D0Ds-)=0. 019±0.003±0.003, B(B ̄0→D0D ̄0)B(B -→D0Ds-)<0.0024 at 90% CL, B(B̄s0→Ds+Ds-)B(B0→D -Ds+)=0.56±0.03±0. 04, B(B -→D0Ds-)B(B0→D -Ds+)=1.22±0. 02±0.07, where the uncertainties are statistical and systematic, respectively.
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|Publication status||Published - 21 May 2013|
Copyright 2013 Elsevier B.V., All rights reserved.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)