Study of light-meson resonances decaying to K S0 Kπ in the B → (K S0 Kπ)K channels
A study is presented of B+→KS0K-π+K+ and B+→KS0K+π-K+ 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 fb-1. The KS0Kπ invariant-mass distributions of both B+ de...
| Autores: | , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universitat Ramon Llull (URL) |
| Repositorio: | DAU Arxiu Digital de la Universitat Ramon Llull |
| OAI Identifier: | oai:dau.url.edu:20.500.14342/5998 |
| Acceso en línea: | http://hdl.handle.net/20.500.14342/5998 https://doi.org/10.1103/PhysRevD.111.092009 |
| Access Level: | acceso abierto |
| Palabra clave: | Particle decays Quark model Gran col·lisionador d'hadrons (França i Suïssa) 530.1 539 |
| Sumario: | A study is presented of B+→KS0K-π+K+ and B+→KS0K+π-K+ 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 fb-1. The KS0Kπ invariant-mass distributions of both B+ decay modes show, in the m(KS0Kπ)<1.85 GeV mass region, large activity which is resolved using an amplitude analysis. A simple model, where JPC 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 JPC=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 KS0Kπ Dalitz plots are dominated by asymmetric crossing K∗K̄ 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. |
|---|