Observation of the doubly-charmed-baryon decay Ξcc++ → Ξc0 π+ π+ ABSTRACT: A search for the doubly-charmed-baryon decay Ξcc++ → Ξc0 π+ π+ is performed using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of 13 TeV and corresponding to an integrated luminosity of 5.4 fb^−1. A significant structure consistent with the Ξcc++ baryon is observed in the Ξc0 π+ π+ invariant-mass spectrum. Using the Ξcc++ → Λc+ K− π+ π+ decay as the normalisation channel, the branching fraction ratio, B(Ξcc++ → Ξc0 π+ π+)/B(Ξcc++ → Λc+ K− π+ π+), is measured to be 1.37 ± 0.18(stat) ± 0.09(syst) ± 0.35(ext). This measurement provides critical input for testing QCD factorisation methods in the weak decays of doubly-heavy baryons, particularly in quantifying nonperturbative effects such as final-state interactions and resonance contributions to the hadronisation process.

Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adefisoye, A.A., et al. (2025). Observation of the doubly-charmed-baryon decay Ξcc++ → Ξc0 π+ π+. JOURNAL OF HIGH ENERGY PHYSICS, 2025(10), 0-22 [10.1007/jhep10(2025)136].

Observation of the doubly-charmed-baryon decay Ξcc++ → Ξc0 π+ π+

Carbone, A.;Ferrari, F.;Galli, D.;Patrignani, C.;Spedicato, E.;Villa, A.;Zenesini, F.;
2025

Abstract

Observation of the doubly-charmed-baryon decay Ξcc++ → Ξc0 π+ π+ ABSTRACT: A search for the doubly-charmed-baryon decay Ξcc++ → Ξc0 π+ π+ is performed using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of 13 TeV and corresponding to an integrated luminosity of 5.4 fb^−1. A significant structure consistent with the Ξcc++ baryon is observed in the Ξc0 π+ π+ invariant-mass spectrum. Using the Ξcc++ → Λc+ K− π+ π+ decay as the normalisation channel, the branching fraction ratio, B(Ξcc++ → Ξc0 π+ π+)/B(Ξcc++ → Λc+ K− π+ π+), is measured to be 1.37 ± 0.18(stat) ± 0.09(syst) ± 0.35(ext). This measurement provides critical input for testing QCD factorisation methods in the weak decays of doubly-heavy baryons, particularly in quantifying nonperturbative effects such as final-state interactions and resonance contributions to the hadronisation process.
2025
Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adefisoye, A.A., et al. (2025). Observation of the doubly-charmed-baryon decay Ξcc++ → Ξc0 π+ π+. JOURNAL OF HIGH ENERGY PHYSICS, 2025(10), 0-22 [10.1007/jhep10(2025)136].
Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adefisoye, A. A.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Agapopoul...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1036151
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