The decay mode Bs0DsK allows for one of the theoretically cleanest measurements of the CKM angle γ through the study of time-dependent CP violation. This paper reports a measurement of its branching fraction relative to the Cabibbo-favoured mode Bs0Ds−+ based on a data sample corresponding to 0.37 fb−1 of proton-proton collisions at s=7TeV collected in 2011 with the LHCb detector. In addition, the ratio of B meson production fractions f s /f d , determined from semileptonic decays, together with the known branching fraction of the control channel B 0 → D −π+, is used to perform an absolute measurement of the branching fractions: where the first uncertainty is statistical, the second the experimental systematic uncertainty, and the third the uncertainty due to f s /f d .
Measurements of the branching fractions of the decays B0s→D∓sK± and B0s→D−sπ+
VELTRI, MICHELE;
2012
Abstract
The decay mode Bs0DsK allows for one of the theoretically cleanest measurements of the CKM angle γ through the study of time-dependent CP violation. This paper reports a measurement of its branching fraction relative to the Cabibbo-favoured mode Bs0Ds−+ based on a data sample corresponding to 0.37 fb−1 of proton-proton collisions at s=7TeV collected in 2011 with the LHCb detector. In addition, the ratio of B meson production fractions f s /f d , determined from semileptonic decays, together with the known branching fraction of the control channel B 0 → D −π+, is used to perform an absolute measurement of the branching fractions: where the first uncertainty is statistical, the second the experimental systematic uncertainty, and the third the uncertainty due to f s /f d .I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.