A measurement of four branching-fraction ratios for three-body decays of B mesons involving two open-charm hadrons in the final state is presented. Run 1 and Run 2 pp collision data are used, recorded by the LHCb experiment at centre-of-mass energies 7, 8, and 13 TeV and corresponding to an integrated luminosity of 9 fb(-1). The measured branching-fraction ratios areBB+-> D+D-K+BB+-> D0D0K+=0.5170.0150.013 +/- 0.011,BB+-> D-D+K+BB+-> D0D0K+=0.577 +/- 0.016 +/- 0.013 +/- 0.013,BB0 -> D-D0K+BB0 -> D-D0K+=1.754 +/- 0.028 +/- 0.016 +/- 0.035,BB+-> D+D-K+BB+-> D-D+K+=0.907 +/- 0.033+/- 0.014,where the first of the uncertainties is statistical, the second systematic, and the third is due to the uncertainties on the D-meson branching fractions. These are the most accurate measurements of these ratios to date.

Measurement of branching fraction ratios for B+ -> D*+D-K+, B+ -> D*-D+K+, and B-0 -> (D*-DK+)-K-0 decays

Bassi, G.
Membro del Collaboration Group
;
Lusiani, A.
Membro del Collaboration Group
;
Morello, M. J.
Membro del Collaboration Group
;
Pajero, T.
Membro del Collaboration Group
;
2020

Abstract

A measurement of four branching-fraction ratios for three-body decays of B mesons involving two open-charm hadrons in the final state is presented. Run 1 and Run 2 pp collision data are used, recorded by the LHCb experiment at centre-of-mass energies 7, 8, and 13 TeV and corresponding to an integrated luminosity of 9 fb(-1). The measured branching-fraction ratios areBB+-> D+D-K+BB+-> D0D0K+=0.5170.0150.013 +/- 0.011,BB+-> D-D+K+BB+-> D0D0K+=0.577 +/- 0.016 +/- 0.013 +/- 0.013,BB0 -> D-D0K+BB0 -> D-D0K+=1.754 +/- 0.028 +/- 0.016 +/- 0.035,BB+-> D+D-K+BB+-> D-D+K+=0.907 +/- 0.033+/- 0.014,where the first of the uncertainties is statistical, the second systematic, and the third is due to the uncertainties on the D-meson branching fractions. These are the most accurate measurements of these ratios to date.
2020
Settore FIS/01 - Fisica Sperimentale
B physics; Branching fraction; Flavor physics; Hadron-Hadron scattering (experiments);
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/101651
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