Measurement of the CP-violating weak phase ϕs and the decay width difference ΔΓs using the Bs0→J/ψϕ(1020) decay channel in pp collisions at √ s=8 TeV
The CP-violating weak phase φs of the Bs0 meson and the decay width difference ϕΓs of the Bs0 light and heavy mass eigenstates are measured with the CMS detector at the LHC using a data sample of Bs0→J/ψϕ(1020)→μ+μ-K+K- decays. The analysed data set corresponds to an integrated luminosity of 19.7 fb...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2016 |
| País: | España |
| Institución: | Universidad Autónoma de Madrid |
| Repositorio: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.uam.es:10486/678316 |
| Acceso en línea: | http://hdl.handle.net/10486/678316 https://dx.doi.org/10.1016/j.physletb.2016.03.046 |
| Access Level: | acceso abierto |
| Palabra clave: | B-physics Physics CMS CP violation Física |
| Sumario: | The CP-violating weak phase φs of the Bs0 meson and the decay width difference ϕΓs of the Bs0 light and heavy mass eigenstates are measured with the CMS detector at the LHC using a data sample of Bs0→J/ψϕ(1020)→μ+μ-K+K- decays. The analysed data set corresponds to an integrated luminosity of 19.7 fb-1 collected in pp collisions at a centre-of-mass energy of 8 TeV. A total of 49 200 reconstructed Bs0 decays are used to extract the values of φs and ΔΓs by performing a time-dependent and flavour-tagged angular analysis of the μ+μ-K+K- final state. The weak phase is measured to be ϕs=-0.075±0.097(stat)±0.031(syst) rad, and the decay width difference is ΔΓs=0.095±0.013(stat)±0.007(syst) ps-1 |
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