First observation of B0s → J/ψ f0(980) decays
Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the hadronic decayB0s→J/ψf0(980) is observed. ThisCP eigenstate mode could be used to measure mixing-induced CP violation in theB0ssystem. Using a fit to theπ+π−mass spectrum with interfering...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2011 |
| País: | España |
| Institución: | Universitat Ramon Llull (URL) |
| Repositorio: | DAU Arxiu Digital de la Universitat Ramon Llull |
| OAI Identifier: | oai:dau.url.edu:20.500.14342/3381 |
| Acceso en línea: | http://hdl.handle.net/20.500.14342/3381 https://doi.org/10.1016/j.physletb.2011.03.006 |
| Access Level: | acceso abierto |
| Palabra clave: | Gran col·lisionador d'hadrons (França i Suïssa) Protons Partícules (Física nuclear) Col·lisions (Física nuclear) 53 |
| Sumario: | Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the hadronic decayB0s→J/ψf0(980) is observed. ThisCP eigenstate mode could be used to measure mixing-induced CP violation in theB0ssystem. Using a fit to theπ+π−mass spectrum with interfering resonances givesRf0/φ≡Γ(B0s→J/ψf0, f0→π+π−)Γ(B0s→J/ψφ, φ→K+K−)= 0.252+0.046+0.027−0.032−0.033. In the interval±90 MeV around980 MeV, corresponding to approximately two fullf0widths we also findR′≡Γ(B0s→J/ψπ+π−,|m(π+π−)−980 MeV|<90 MeV)Γ(B0s→J/ψφ, φ→K+K−)= 0.162±0.022±0.016, where in both casesthe uncertainties are statistical and systematic, respectively |
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