The relative production rate of Bs0 and B 0 mesons is determined with the hadronic decays Bs 0 → Ds-π+ and B 0 → D - K +. The measurement uses data corresponding to 1.0 fb-1 of pp collisions at a centre-of-mass energy of √s=7 TeV 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 d on the transverse momentum and pseudorapidity of the B meson is determined using the decays Bs0 Ds-π+ 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). © 2013 CERN for the benefit of the LHCb collaboration
Aaij, R., Abellan Beteta, C., Adametz, A., Adeva, B., Adinolfi, M., Adrover, C., et al. (2013). Measurement of the fragmentation fraction ratio fs/fd and its dependence on B meson kinematics. JOURNAL OF HIGH ENERGY PHYSICS, 2013(4), 1-16 [10.1007/JHEP04(2013)001].
Measurement of the fragmentation fraction ratio fs/fd and its dependence on B meson kinematics
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2013
Abstract
The relative production rate of Bs0 and B 0 mesons is determined with the hadronic decays Bs 0 → Ds-π+ and B 0 → D - K +. The measurement uses data corresponding to 1.0 fb-1 of pp collisions at a centre-of-mass energy of √s=7 TeV 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 d on the transverse momentum and pseudorapidity of the B meson is determined using the decays Bs0 Ds-π+ 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). © 2013 CERN for the benefit of the LHCb collaboration
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