The relative abundance of the three decay modes B0→D -K +, B0→D -π +, and Bs0→Ds- π + produced in 7 TeV pp collisions at the LHC is determined from data corresponding to an integrated luminosity of 35pb -1. The branching fraction of B0→D -K + is found to be B(B0→D -K +)=(2.01±0.18stat±0.14syst) ×10 -4. The ratio of fragmentation fractions f s/f d is determined through the relative abundance of Bs0→Ds-π + to B0→D -K + and B0→D -π +, leading to f s/f d=0.253±0.017±0.017±0.020, where the uncertainties are statistical, systematic, and theoretical, respectively.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)