Determination of f(s)/f(d) for 7 TeV pp Collisions and Measurement of the B-0 -> D-K+ Branching Fraction

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doi:10.1103/PhysRevLett.107.211801

The relative abundance of the three decay modes B(0)→D(-)K(+), B(0)→D(-)π(+), and B(s)(0)→D(s)(-)π(+) 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 B(0)→D(-)K(+) is found to be B(B(0)→D(-)K(+)) = (2.01 ± 0.18(stat) ± 0.14(syst)) × 10(-4). The ratio of fragmentation fractions f(s)/f(d) is determined through the relative abundance of B(s)(0)→D(s)(-)π(+) to B(0)→D(-)K(+) and B(0)→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.

Aaij, R., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., Ajaltouni, Z., et al. (2011). Determination of f(s)/f(d) for 7 TeV pp Collisions and Measurement of the B-0 -> D-K+ Branching Fraction. PHYSICAL REVIEW LETTERS, 107(21), 211801 [10.1103/PhysRevLett.107.211801].