The multihadron decays Λb0 → D+pπ−π− and Λb0 → D*+pπ−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 beB(Λb0→D+pπ−π−)B(Λb0→Λc0π+π−π−)×B(D+→K−π+π+)B(Λc0→pK−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*+pπ−π− and Λb0 → D+pπ−π− decays is found to beB(Λb0→D∗+pπ−π−)B(Λb0→D+pπ−π−)×(B(D∗+→D+π0)+B(D∗+→D+γ))=(61.3±4.3±4.0)%.

Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinen, F., Ackernley, T., Adeva, B., et al. (2022). Observation of Λb0 → D + pπ− π− and Λb0 → D *+ pπ− π− decays. JOURNAL OF HIGH ENERGY PHYSICS, 2022(3) [10.1007/JHEP03(2022)153].

Observation of Λb0 → D + pπ− π− and Λb0 → D *+ pπ− π− decays

Borsato M.;Calvi M.;Capelli S.;Carniti P.;Fazzini D.;Garcia Pardinas J.;Gotti C.;Grillo L.;Khanji B.;Kucharczyk M.;Martinazzoli L.;Martinelli M.;Matteuzzi C.;Meloni S.;Minotti A.;Petrucci S.;Petruzzo M.;Pizzichemi M.;Salomoni M.;Shields E. B.;
2022

Abstract

The multihadron decays Λb0 → D+pπ−π− and Λb0 → D*+pπ−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 beB(Λb0→D+pπ−π−)B(Λb0→Λc0π+π−π−)×B(D+→K−π+π+)B(Λc0→pK−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*+pπ−π− and Λb0 → D+pπ−π− decays is found to beB(Λb0→D∗+pπ−π−)B(Λb0→D+pπ−π−)×(B(D∗+→D+π0)+B(D∗+→D+γ))=(61.3±4.3±4.0)%.
Articolo in rivista - Articolo scientifico
B Physics; Branching fraction; Flavour Physics; Hadron-Hadron Scattering;
English
23-mar-2022
2022
2022
3
153
none
Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinen, F., Ackernley, T., Adeva, B., et al. (2022). Observation of Λb0 → D + pπ− π− and Λb0 → D *+ pπ− π− decays. JOURNAL OF HIGH ENERGY PHYSICS, 2022(3) [10.1007/JHEP03(2022)153].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/420898
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