The relative production rate of B 0 sand B 0mesons is determined with the hadronic decays B 0 s→ D − sπ +and B 0→ D −K +. The measurement uses data corresponding to 1.0 fb −1of pp collisions at a centre-of-mass energy of √s = 7TeV recorded in the forward region with the LHCb experiment. The ratio of production rates, f s/f d, is measured to be 0.238 ± 0.004 ± 0.015 ± 0.021, where the first uncertainty is statistical, the second systematic, and the third theoretical. This is combined with a previous LHCb measurement to obtain f s/f d= 0.256 ±0.020. The dependence of f s/f don the transverse momentum and pseudorapidity of the B meson is determined using the decays B 0 s→ D − sπ +and B 0→ D −π +. There is evidence for a decrease with increasing transverse momentum, whereas the ratio remains constant as a function of pseudorapidity. In addition, the ratio of branching fractions of the decays B 0→ D −K +and B 0→ D −π +is measured to be 0.0822 ± 0.0011 (stat) ± 0.0025 (syst).
All Science Journal Classification (ASJC) codes
- Física nuclear y de alta energía