A study is presented of B+ → K0S K− π+ K+ and B+ → K0S K+ π− K+ decays based on the analysis of proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fb^−1. The K0S K π invariant-mass distributions of both B+ decay modes show, in the m(K0S K π) < 1.85 GeV mass region, large activity which is resolved using an amplitude analysis. A simple model, were J^PC amplitudes are described by multiple Breit-Wigner functions with appropriate angular distributions provides a good description of the experimental data. In this approach a complex mixture of J^PC = 0^−+, 1^++ and 1^+− amplitudes is observed that is dominated by η(1405), η(1470), η(1760), f1(1285), f1(1420) and h1(1405) resonances. The K0S K π Dalitz plots are dominated by asymmetric crossing K* anti-K bands which are different for the two B+ decay modes. This is due to a different interference pattern between the 1^++ and 1^+− amplitudes in the two channels. Branching fractions are measured for each resonant contribution.

Aaij, R., Abdelmotteleb, A. s. w., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adefisoye, A. a., et al. (2025). Study of light-meson resonances decaying to K0S K π in the B → (K0S K π) K channels. PHYSICAL REVIEW D, 111(9), 1-32 [10.1103/physrevd.111.092009].

Study of light-meson resonances decaying to K0S K π in the B → (K0S K π) K channels

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

Abstract

A study is presented of B+ → K0S K− π+ K+ and B+ → K0S K+ π− K+ decays based on the analysis of proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fb^−1. The K0S K π invariant-mass distributions of both B+ decay modes show, in the m(K0S K π) < 1.85 GeV mass region, large activity which is resolved using an amplitude analysis. A simple model, were J^PC amplitudes are described by multiple Breit-Wigner functions with appropriate angular distributions provides a good description of the experimental data. In this approach a complex mixture of J^PC = 0^−+, 1^++ and 1^+− amplitudes is observed that is dominated by η(1405), η(1470), η(1760), f1(1285), f1(1420) and h1(1405) resonances. The K0S K π Dalitz plots are dominated by asymmetric crossing K* anti-K bands which are different for the two B+ decay modes. This is due to a different interference pattern between the 1^++ and 1^+− amplitudes in the two channels. Branching fractions are measured for each resonant contribution.
2025
Aaij, R., Abdelmotteleb, A. s. w., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adefisoye, A. a., et al. (2025). Study of light-meson resonances decaying to K0S K π in the B → (K0S K π) K channels. PHYSICAL REVIEW D, 111(9), 1-32 [10.1103/physrevd.111.092009].
Aaij, R.; Abdelmotteleb, A.  s.  w.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adefisoye, A.  a.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Agapop...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1035085
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