The ratios of the branching fractions of the decays Λc+→ pπ−π+, Λc+→ pK−K+, and Λc+→ pπ−K+with respect to the Cabibbo-favoured Λc+→ pK−π+decay are measured using proton-proton collision data collected with the LHCb experiment at a 7 TeV centre-of-mass energy and corresponding to an integrated luminosity of 1.0 fb−1:ℬ(Λc+→p+)ℬ(Λc+→pK−π+)=(7.44±0.08±0.18)%,ℬ(Λc+→pK−K+)ℬ(Λc+→pK−π+)=(1.70±0.03±0.03)%ℬ(Λc+→pπ−K+)ℬ(Λc+→pK−π+)=(0.165±0.015±0.005)%,where the uncertainties are statistical and systematic, respectively. These results are the most precise measurements of these quantities to date. When multiplied by the world-average value for ℬ(Λc+→pK−π+), the corresponding branching fractions areℬ(Λc+→p+)=(4.72±0.05±0.11±0.25)×10−3,ℬ(Λc+→pK−K+)=(1.08±0.02±0.02±0.06)×10−3,ℬ(Λc+→pπ−K+)=(1.04±0.09±0.03±0.05)×10−4,where the final uncertainty is due to ℬ(Λc+→pK−π+).[Figure not available: see fulltext.]

Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2018). Measurements of the branching fractions of Λc+→ pπ−π+, Λc+→ pK−K+, and Λc+→ pπ−K+. JOURNAL OF HIGH ENERGY PHYSICS, 2018(3) [10.1007/JHEP03(2018)043].

Measurements of the branching fractions of Λc+→ pπ−π+, Λc+→ pK−K+, and Λc+→ pπ−K+

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

Abstract

The ratios of the branching fractions of the decays Λc+→ pπ−π+, Λc+→ pK−K+, and Λc+→ pπ−K+with respect to the Cabibbo-favoured Λc+→ pK−π+decay are measured using proton-proton collision data collected with the LHCb experiment at a 7 TeV centre-of-mass energy and corresponding to an integrated luminosity of 1.0 fb−1:ℬ(Λc+→p+)ℬ(Λc+→pK−π+)=(7.44±0.08±0.18)%,ℬ(Λc+→pK−K+)ℬ(Λc+→pK−π+)=(1.70±0.03±0.03)%ℬ(Λc+→pπ−K+)ℬ(Λc+→pK−π+)=(0.165±0.015±0.005)%,where the uncertainties are statistical and systematic, respectively. These results are the most precise measurements of these quantities to date. When multiplied by the world-average value for ℬ(Λc+→pK−π+), the corresponding branching fractions areℬ(Λc+→p+)=(4.72±0.05±0.11±0.25)×10−3,ℬ(Λc+→pK−K+)=(1.08±0.02±0.02±0.06)×10−3,ℬ(Λc+→pπ−K+)=(1.04±0.09±0.03±0.05)×10−4,where the final uncertainty is due to ℬ(Λc+→pK−π+).[Figure not available: see fulltext.]
Articolo in rivista - Articolo scientifico
Branching fraction; Charm physics; Flavor physics; Hadron-Hadron scattering (experiments); Spectroscopy; Nuclear and High Energy Physics
English
2018
2018
3
43
open
Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2018). Measurements of the branching fractions of Λc+→ pπ−π+, Λc+→ pK−K+, and Λc+→ pπ−K+. JOURNAL OF HIGH ENERGY PHYSICS, 2018(3) [10.1007/JHEP03(2018)043].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/199571
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