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Determination of fs/fd for 7 TeV pp Collisions and Measurement of the B0→D-K+ Branching Fraction

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Original languageEnglish
Article number211801
JournalPhysical Review Letters
Issue number21
Publication statusPublished - 14 Nov 2011


The relative abundance of the three decay modes Bd→D−K+, Bd→D−π+ and Bs→D−sπ+ produced in 7 TeV pp collisions at the LHC is determined from data corresponding to an integrated luminosity of 35 pb−1. The branching fraction of Bd→D−K+ is found to be B(Bd→D−K+)=(2.01±0.18stat±0.14syst)×10−4. The ratio of fragmentation fractions \fsfdt is determined through the relative abundance of Bs→D−sπ+ to Bd→D−K+ and Bd→D−π+, leading to fs/fd=0.253±0.017±0.017±0.020, where the uncertainties are statistical, systematic, and theoretical respectively.

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