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Study of light-meson resonances decaying to 𝐾0sβ’πΎβ’πœ‹ in the B β†’(𝐾0sπΎπœ‹)K channels

A study is presented of 𝐡+ →𝐾0Sβ’πΎβˆ’β’πœ‹+⁒𝐾+ and 𝐡+ →𝐾0S⁒𝐾+β’πœ‹βˆ’β’πΎ+ decays based on the analysis of proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fbβˆ’1. The 𝐾0Sβ’πΎβ’πœ‹ invariant-mass distributions of...

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Main Authors: Aaij, Roel (Author) , Bachmann, Sebastian (Author) , Carus, Leon (Author) , Caspary, Rowina (Author) , Celani, Sara (Author) , Cocha Toapaxi, Carlos (Author) , De Cian, Michel (Author) , Dittmann, Lucas (Author) , Esen, Sevda (Author) , Glaser, Fabian (Author) , Günther, Paul André (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Herrero Gascón, Paula (Author) , Langenbruch, Christoph (Author) , Leverington, Blake (Author) , Marks, Jörg (Author) , Morgenthaler, Maurice Pierre (Author) , Roy, Shreya (Author) , Ruiz Diaz, Miguel (Author) , Schiller, Manuel (Author) , Tat, Martin Duy (Author) , Tuci, Giulia (Author) , Uecker, Lennart Henning (Author) , Unverzagt, Daniel Joachim (Author) , Uwer, Ulrich (Author) , Wang, Chishuai (Author) , Witola, Lukas (Author) , Zhao, Ya (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 15 May 2025
In: Physical review
Year: 2025, Volume: 111, Issue: 9, Pages: 1-32
ISSN:2470-0029
DOI:10.1103/PhysRevD.111.092009
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1103/PhysRevD.111.092009
Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.111.092009
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Author Notes:R. Aaij et al.* (LHCb Collaboration)
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Summary:A study is presented of 𝐡+ →𝐾0Sβ’πΎβˆ’β’πœ‹+⁒𝐾+ and 𝐡+ →𝐾0S⁒𝐾+β’πœ‹βˆ’β’πΎ+ decays based on the analysis of proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fbβˆ’1. The 𝐾0Sβ’πΎβ’πœ‹ invariant-mass distributions of both 𝐡+ decay modes show, in the π‘šβ‘(𝐾0Sβ’πΎβ’πœ‹) <1.85 GeV mass region, large activity which is resolved using an amplitude analysis. A simple model, where 𝐽𝑃⁒𝐢 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 𝐽𝑃⁒𝐢 =0βˆ’+, 1 and 1+βˆ’ amplitudes is observed that is dominated by πœ‚β‘(1405), πœ‚β‘(1470), πœ‚β‘(1760), 𝑓1⁑(1285), 𝑓1⁑(1420) and β„Ž1⁑(1405) resonances. The 𝐾0Sβ’πΎβ’πœ‹ Dalitz plots are dominated by asymmetric crossing 𝐾*⁒¯𝐾 bands which are different for the two 𝐡+ decay modes. This is due to a different interference pattern between the 1 and 1+βˆ’ amplitudes in the two channels. Branching fractions are measured for each resonant contribution.
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LHCb Collaboration: R. Aaij, S. Bachmann, L. Carus, R. Caspary, S. Celani, C. Cocha Toapaxi, M. De Cian, L. Dittmann, S. Esen, F.C. Glaser, P.A. Günther, X. Han, S. Hansmann-Menzemer, P. Herrero Gascón, C. Langenbruch, B. Leverington, J. Marks, M.P. Morgenthaler, S.R. Roy, M. Ruiz Diaz, M. Schiller, M.D. Tat, G. Tuci, L.H. Uecker, D.J. Unverzagt, U. Uwer, C. Wang, L. Witola, Y. Zhao, A. Zhelezov [und viele weitere]
Gesehen am 11.02.2026
Physical Description:Online Resource
ISSN:2470-0029
DOI:10.1103/PhysRevD.111.092009

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