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Update to the LHCb sensitivity to $\sin 2\beta$ from the CP-asymmetry in $B^0 \to J\psi(\mu\mu)K^0_S$ decays
This note presents an update of the \BdJmmKS\ analysis in order to obtain the LHCb sensitivity to $\sin(2\beta)$. An update of the analysis of \BdJmmKst, the control channel for tagging, is also shown here. We estimate an annual yield of 236k for \BdJmmKS\ channel, with a background to signal ratio...
| Autores principales: | , , , |
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| Lenguaje: | eng |
| Publicado: |
2007
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| Materias: | |
| Acceso en línea: | http://cds.cern.ch/record/1035071 |
| _version_ | 1780912435137347584 |
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| author | Amato, S Gandelman, M Göbel, C De Paula, L |
| author_facet | Amato, S Gandelman, M Göbel, C De Paula, L |
| author_sort | Amato, S |
| collection | CERN |
| description | This note presents an update of the \BdJmmKS\ analysis in order to obtain the LHCb sensitivity to $\sin(2\beta)$. An update of the analysis of \BdJmmKst, the control channel for tagging, is also shown here. We estimate an annual yield of 236k for \BdJmmKS\ channel, with a background to signal ratio (B/S) of 8.4. A yield of 228k with B/S of about 0.9 is obtained by applying a cut to reduce prompt \Jpsi\ decays. We estimate an annual yield of 932k with B/S$= 0.155$ for \BdJmmKst. We measure the mistag rate to be $38.7\pm 0.1$\% from \BdJmmKst\ and find that this value can be used without corrections for the \BdJmmKS\ channel. The statistical sensitivity on $\sin(2\beta)$ is found to be 0.020 for 2 fb$^{-1}$ of data. |
| id | cern-1035071 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2007 |
| record_format | invenio |
| spelling | cern-10350712019-09-30T06:29:59Zhttp://cds.cern.ch/record/1035071engAmato, SGandelman, MGöbel, CDe Paula, LUpdate to the LHCb sensitivity to $\sin 2\beta$ from the CP-asymmetry in $B^0 \to J\psi(\mu\mu)K^0_S$ decaysDetectors and Experimental TechniquesThis note presents an update of the \BdJmmKS\ analysis in order to obtain the LHCb sensitivity to $\sin(2\beta)$. An update of the analysis of \BdJmmKst, the control channel for tagging, is also shown here. We estimate an annual yield of 236k for \BdJmmKS\ channel, with a background to signal ratio (B/S) of 8.4. A yield of 228k with B/S of about 0.9 is obtained by applying a cut to reduce prompt \Jpsi\ decays. We estimate an annual yield of 932k with B/S$= 0.155$ for \BdJmmKst. We measure the mistag rate to be $38.7\pm 0.1$\% from \BdJmmKst\ and find that this value can be used without corrections for the \BdJmmKS\ channel. The statistical sensitivity on $\sin(2\beta)$ is found to be 0.020 for 2 fb$^{-1}$ of data.LHCb-2007-045CERN-LHCb-2007-045oai:cds.cern.ch:10350712007-05-22 |
| spellingShingle | Detectors and Experimental Techniques Amato, S Gandelman, M Göbel, C De Paula, L Update to the LHCb sensitivity to $\sin 2\beta$ from the CP-asymmetry in $B^0 \to J\psi(\mu\mu)K^0_S$ decays |
| title | Update to the LHCb sensitivity to $\sin 2\beta$ from the CP-asymmetry in $B^0 \to J\psi(\mu\mu)K^0_S$ decays |
| title_full | Update to the LHCb sensitivity to $\sin 2\beta$ from the CP-asymmetry in $B^0 \to J\psi(\mu\mu)K^0_S$ decays |
| title_fullStr | Update to the LHCb sensitivity to $\sin 2\beta$ from the CP-asymmetry in $B^0 \to J\psi(\mu\mu)K^0_S$ decays |
| title_full_unstemmed | Update to the LHCb sensitivity to $\sin 2\beta$ from the CP-asymmetry in $B^0 \to J\psi(\mu\mu)K^0_S$ decays |
| title_short | Update to the LHCb sensitivity to $\sin 2\beta$ from the CP-asymmetry in $B^0 \to J\psi(\mu\mu)K^0_S$ decays |
| title_sort | update to the lhcb sensitivity to $\sin 2\beta$ from the cp-asymmetry in $b^0 \to j\psi(\mu\mu)k^0_s$ decays |
| topic | Detectors and Experimental Techniques |
| url | http://cds.cern.ch/record/1035071 |
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