An amplitude analysis of the B0->eta_c(1S)K+pi- decays with eta_c(1S)->ppbar is performed using a sample corresponding to an integrated luminosity of 9fb-1 of pp collision data collected by the LHCb detector at centre-of-mass energies of sqrt{s} = 7, 8 and 13TeV. The data are described with a model including only intermediate contributions from known K∗0 resonances. Evidence for an exotic resonance in the eta_c(1S)pi- system, reported in a previous analysis of this decay channel, is not confirmed. The inclusive branching fraction of the B0->eta_c(1S)K+pi- decays is measured to be (Formula presented.) where the first uncertainty is statistical, the second systematic, and the third arises from the limited knowledge of external branching fractions.

Amplitude analysis of B0->eta_{c}(1S)K+pi- decays

Xu A.
Membro del Collaboration Group
;
Riccardi D.;Pica L.
Membro del Collaboration Group
;
Passaro D.
Membro del Collaboration Group
;
Morello M. J.
Membro del Collaboration Group
;
Kleijne N.
Membro del Collaboration Group
;
Cordova G.
Membro del Collaboration Group
;
Celestino I.
Membro del Collaboration Group
;
2026

Abstract

An amplitude analysis of the B0->eta_c(1S)K+pi- decays with eta_c(1S)->ppbar is performed using a sample corresponding to an integrated luminosity of 9fb-1 of pp collision data collected by the LHCb detector at centre-of-mass energies of sqrt{s} = 7, 8 and 13TeV. The data are described with a model including only intermediate contributions from known K∗0 resonances. Evidence for an exotic resonance in the eta_c(1S)pi- system, reported in a previous analysis of this decay channel, is not confirmed. The inclusive branching fraction of the B0->eta_c(1S)K+pi- decays is measured to be (Formula presented.) where the first uncertainty is statistical, the second systematic, and the third arises from the limited knowledge of external branching fractions.
Amplitude analysis of B0→ηc(1S)K+π- decays
2026
Settore FIS/01 - Fisica Sperimentale
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
Amplitude analysis; Branching fractions; Center-of-mass energies; Centre-of-mass energies; Decay channels; Integrated luminosity; Uncertainty
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/169463
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