The multihadron decays Λb0 → D+ p π− π− and Λb0 → D*+ p π− π− are observed in data corresponding to an integrated luminosity of 3 fb^−1, collected in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV by the LHCb detector. Using the decay Λb0 → Λc+ π+ π− π− as a normalisation channel, the ratio of branching fractions is measured to be B(Λb0 → D+ p π− π−)/B(Λb0 → Λc+ π+ π− π−) × B(D+ → K− π+ π+)/B(Λc+ → p K− π+) = (5.35 ± 0.21 ± 0.16)%, where the first uncertainty is statistical and the second systematic. The ratio of branching fractions for the Λb0 → D*+ p π− π− and Λb0 → D+ p π− π− decays is found to be B(Λ0b → D*+ p π− π−)/B(Λ0b → D+ p π− π−) × (B(D*+ → D+ π0) + B(D*+ → D+ γ)) = (61.3 ± 4.3 ± 4.0)%.

Observation of Λb0 → D+ p π− π− and Λb0 → D*+ p π− π− Decays

Calabrese, R.;Capriotti, L.;Couturier, B.;Fiorini, M.;Franzoso, E.;Giugliano, C.;Guarise, M.;Kotriakhova, S.;Luppi, E.;Okamura, S.;Pappalardo, L. L.;Passalacqua, B.;Tomassetti, L.;
2022

Abstract

The multihadron decays Λb0 → D+ p π− π− and Λb0 → D*+ p π− π− are observed in data corresponding to an integrated luminosity of 3 fb^−1, collected in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV by the LHCb detector. Using the decay Λb0 → Λc+ π+ π− π− as a normalisation channel, the ratio of branching fractions is measured to be B(Λb0 → D+ p π− π−)/B(Λb0 → Λc+ π+ π− π−) × B(D+ → K− π+ π+)/B(Λc+ → p K− π+) = (5.35 ± 0.21 ± 0.16)%, where the first uncertainty is statistical and the second systematic. The ratio of branching fractions for the Λb0 → D*+ p π− π− and Λb0 → D+ p π− π− decays is found to be B(Λ0b → D*+ p π− π−)/B(Λ0b → D+ p π− π−) × (B(D*+ → D+ π0) + B(D*+ → D+ γ)) = (61.3 ± 4.3 ± 4.0)%.
2022
Aaij, R.; Abdelmotteleb, A. S. W.; Abellán Beteta, C.; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Agapopoulou, C.; Aidala, C...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2500463
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