An amplitude analysis of the B0→ηc(1S)K+π- decays with ηc(1S)→pp¯ 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 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 ηc(1S)π- system, reported in a previous analysis of this decay channel, is not confirmed. The inclusive branching fraction of the B0→ηc(1S)K+π- 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.

Zunica, G., Zuliani, D., Zou, Q., Zhuo, J., Zhukov, V., Zhu, Y., et al. (2026). Amplitude analysis of B0→ηc(1S)K+π- decays. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 86(5) [10.1140/epjc/s10052-026-15474-w].

Amplitude analysis of B0→ηc(1S)K+π- decays

Salomoni M.;Pizzichemi M.;Minotti A.;Martinelli M.;Martinazzoli L.;Malentacca L.;Kirsebom V. S.;Gotti C.;Fazzini D.;Falcao L. N.;Carniti P.;Capelli S.;Calvi M.;Borsato M.;Anelli A.;
2026

Abstract

An amplitude analysis of the B0→ηc(1S)K+π- decays with ηc(1S)→pp¯ 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 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 ηc(1S)π- system, reported in a previous analysis of this decay channel, is not confirmed. The inclusive branching fraction of the B0→ηc(1S)K+π- 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.
Articolo in rivista - Articolo scientifico
Boron compounds; Tellurium compounds
English
18-mag-2026
2026
86
5
537
none
Zunica, G., Zuliani, D., Zou, Q., Zhuo, J., Zhukov, V., Zhu, Y., et al. (2026). Amplitude analysis of B0→ηc(1S)K+π- decays. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 86(5) [10.1140/epjc/s10052-026-15474-w].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/609662
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