The first observation of the Bs0→D̄0K+K- decay is reported, together with the most precise branching fraction measurement of the mode B0→D̄0K+K-. The results are obtained from an analysis of pp collision data corresponding to an integrated luminosity of 3.0 fb-1. The data were collected with the LHCb detector at center-of-mass energies of 7 and 8 TeV. The branching fraction of the B0→D̄0K+K- decay is measured relative to that of the decay B0→D̄0π+π- to be B(B0→D̄0K+K-)/B(B0→D̄0π+π-) = (6.9 ± 0.4 ± 0.3)%, where the first uncertainty is statistical and the second is systematic. The measured branching fraction of the Bs0→D̄0K+K- decay mode relative to that of the corresponding B0 decay is B(Bs0→D̄0K+K-)/B(B0→D̄0K+K-) = (93.0 ± 8.9 ± 6.9)%. Using the known branching fraction of B0→D̄0π+π-, the values of B(B0→D̄0K+K-) = (6.1 ± 0.4 ± 0.3 ± 0.3)×10-5 and B(Bs0→D̄0K+K-) = (5.7 ± 0.5 ± 0.4 ± 0.5)×10-5 are obtained, where the third uncertainties arise from the branching fraction of the decay modes B0→D̄0π+π- and B0→D̄0K+K-, respectively.

Aaij, R., Adeva, B., Adinolfi, M., Aidala, C., Ajaltouni, Z., Akar, S., et al. (2018). Observation of the decay Bs0 → D ̄ 0K+K-. PHYSICAL REVIEW D, 98(7) [10.1103/PhysRevD.98.072006].

Observation of the decay Bs0 → D ̄ 0K+K-

Belloli, N.;Borsato, M.;Calvi, M.;Carniti, P.;Cassina, L.;Fazzini, D.;Gotti, C.;Martinelli, M.;Matteuzzi, C.;Petruzzo, M.;
2018

Abstract

The first observation of the Bs0→D̄0K+K- decay is reported, together with the most precise branching fraction measurement of the mode B0→D̄0K+K-. The results are obtained from an analysis of pp collision data corresponding to an integrated luminosity of 3.0 fb-1. The data were collected with the LHCb detector at center-of-mass energies of 7 and 8 TeV. The branching fraction of the B0→D̄0K+K- decay is measured relative to that of the decay B0→D̄0π+π- to be B(B0→D̄0K+K-)/B(B0→D̄0π+π-) = (6.9 ± 0.4 ± 0.3)%, where the first uncertainty is statistical and the second is systematic. The measured branching fraction of the Bs0→D̄0K+K- decay mode relative to that of the corresponding B0 decay is B(Bs0→D̄0K+K-)/B(B0→D̄0K+K-) = (93.0 ± 8.9 ± 6.9)%. Using the known branching fraction of B0→D̄0π+π-, the values of B(B0→D̄0K+K-) = (6.1 ± 0.4 ± 0.3 ± 0.3)×10-5 and B(Bs0→D̄0K+K-) = (5.7 ± 0.5 ± 0.4 ± 0.5)×10-5 are obtained, where the third uncertainties arise from the branching fraction of the decay modes B0→D̄0π+π- and B0→D̄0K+K-, respectively.
Articolo in rivista - Articolo scientifico
Physics and Astronomy (miscellaneous)
English
2018
98
7
072006
none
Aaij, R., Adeva, B., Adinolfi, M., Aidala, C., Ajaltouni, Z., Akar, S., et al. (2018). Observation of the decay Bs0 → D ̄ 0K+K-. PHYSICAL REVIEW D, 98(7) [10.1103/PhysRevD.98.072006].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/215311
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