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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.

Aaij, R., Abellan Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2020). Measurement of branching fraction ratios for B + → D *+ D − K +, B + → D *− D + K +, and B 0 → D *− D 0 K + decays. JOURNAL OF HIGH ENERGY PHYSICS(12) [10.1007/JHEP12(2020)139].

Measurement of branching fraction ratios for B + → D *+ D − K +, B + → D *− D + K +, and B 0 → D *− D 0 K + decays

Archilli F.;Santovetti E.
Membro del Collaboration Group
;
2020-01-01

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
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/01 - FISICA SPERIMENTALE
English
B physics; Branching fraction; Flavor physics; Hadron-Hadron scattering (experiments)
Aaij, R., Abellan Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2020). Measurement of branching fraction ratios for B + → D *+ D − K +, B + → D *− D + K +, and B 0 → D *− D 0 K + decays. JOURNAL OF HIGH ENERGY PHYSICS(12) [10.1007/JHEP12(2020)139].
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