Publicação
Measurement of the relative width difference of the B-0-(B)over-bar(0) system with the ATLAS detector
| Resumo: | This paper presents the measurement of the relative width difference ∆Γd/Γd of the B0- ¯ B0 system using the data collected by the ATLAS experiment at the LHC in pp collisions at √s = 7TeV and √s = 8TeV and corresponding to an integrated luminosity of 25.2fb−1. The value of ∆Γd/Γd is obtained by comparing the decay-time distributions of B0 → J/ψKS and B0 → J/ψK∗0(892) decays. The result is ∆Γd/Γd = (−0.1±1.1 (stat.)± 0.9 (syst.))×10−2. Currently, this is the most precise single measurement of ∆Γd/Γd. It agrees with the Standard Model prediction and the measurements by other experiments. |
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| Autores principais: | Onofre, A. |
| Outros Autores: | Castro, Nuno Filipe Silva Fernandes; ATLAS Collaboration |
| Assunto: | B physics Hadron-Hadron scattering (experiments) Ciências Naturais::Ciências Físicas |
| Ano: | 2016 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| Resumo: | This paper presents the measurement of the relative width difference ∆Γd/Γd of the B0- ¯ B0 system using the data collected by the ATLAS experiment at the LHC in pp collisions at √s = 7TeV and √s = 8TeV and corresponding to an integrated luminosity of 25.2fb−1. The value of ∆Γd/Γd is obtained by comparing the decay-time distributions of B0 → J/ψKS and B0 → J/ψK∗0(892) decays. The result is ∆Γd/Γd = (−0.1±1.1 (stat.)± 0.9 (syst.))×10−2. Currently, this is the most precise single measurement of ∆Γd/Γd. It agrees with the Standard Model prediction and the measurements by other experiments. |
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