First observation of the decay Bs --> Ds K and measurement of the ratio of branching fractions Br(Bs --> DsK)/Br(Bs --> Ds pi)
| Contribuinte(s) |
University of Helsinki, Department of Physics University of Helsinki, Helsinki Institute of Physics University of Helsinki, Department of Physics University of Helsinki, Helsinki Institute of Physics (HIP) (-2009) University of Helsinki, Department of Physics University of Helsinki, Department of Physics |
|---|---|
| Data(s) |
2008
|
| Resumo |
A combined mass and particle identification fit is used to make the first observation of the decay Bs --> Ds K and measure the branching fraction of Bs --> Ds K relative to Bs --> Ds pi. This analysis uses 1.2 fb^-1 integrated luminosity of pbar-p collisions at sqrt(s) = 1.96 TeV collected with the CDF II detector at the Fermilab Tevatron collider. We observe a Bs --> Ds K signal with a statistical significance of 8.1 sigma and measure Br(Bs --> Ds K)/Br(Bs --> Ds pi) = 0.097 +- 0.018(stat) +- 0.009(sys). |
| Formato |
7 |
| Identificador |
http://hdl.handle.net/10138/23975 0031-9007 |
| Idioma(s) |
eng |
| Publicador |
American Institute of Physics |
| Relação |
Physical Review Letters |
| Fonte |
CDF Collaboration 2008 , ' First observation of the decay Bs -- > Ds K and measurement of the ratio of branching fractions Br(Bs -- > DsK)/Br(Bs -- > Ds pi) ' , Physical Review Letters , vol 103 , no. 19 , pp. 191802 . |
| Palavras-Chave | #hep-ex #114 Physical sciences |
| Tipo |
A1 Refereed journal article document info:eu-repo/semantics/article |
