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First observation of the decay $B^0_s \to K^{*0} \overline{K}^{*0}$
We describe the first observation of the decay $B^0_s \to K^{*0} \bar{K}^{*0}$ with the $\sim$ 35 pb$^{-1}$ of data collected in the 2010 run by LHCb in proton-proton collisions at a centre-of-mass energy of 7 TeV. We find 34.0 $\pm$ 7.4 signal events in the mass interval $\pm$ 50 MeV/$c^2$ around t...
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| Lenguaje: | eng |
| Publicado: |
2011
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| Acceso en línea: | http://cds.cern.ch/record/1344131 |
| _version_ | 1780922177656193024 |
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| author | The LHCb Collaboration |
| author_facet | The LHCb Collaboration |
| author_sort | The LHCb Collaboration |
| collection | CERN |
| description | We describe the first observation of the decay $B^0_s \to K^{*0} \bar{K}^{*0}$ with the $\sim$ 35 pb$^{-1}$ of data collected in the 2010 run by LHCb in proton-proton collisions at a centre-of-mass energy of 7 TeV. We find 34.0 $\pm$ 7.4 signal events in the mass interval $\pm$ 50 MeV/$c^2$ around the $B^0_s$ mass, on top of 14.7 $\pm$ 1.4 background events. The observation has a 7$\sigma$ significance. A preliminary measurement of the branching ratio is performed, giving the result $\cal{B}(B^0_s \to K^{*0}\overline{K}^{*0})$ = (1.95$\pm$0.47($stat.$)$\pm$0.51($syst.$)$\pm$0.29($f_d/f_s$)) x 10$^{-5}$. |
| id | cern-1344131 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2011 |
| record_format | invenio |
| spelling | cern-13441312019-09-30T06:29:59Zhttp://cds.cern.ch/record/1344131engThe LHCb CollaborationFirst observation of the decay $B^0_s \to K^{*0} \overline{K}^{*0}$Particle Physics - ExperimentWe describe the first observation of the decay $B^0_s \to K^{*0} \bar{K}^{*0}$ with the $\sim$ 35 pb$^{-1}$ of data collected in the 2010 run by LHCb in proton-proton collisions at a centre-of-mass energy of 7 TeV. We find 34.0 $\pm$ 7.4 signal events in the mass interval $\pm$ 50 MeV/$c^2$ around the $B^0_s$ mass, on top of 14.7 $\pm$ 1.4 background events. The observation has a 7$\sigma$ significance. A preliminary measurement of the branching ratio is performed, giving the result $\cal{B}(B^0_s \to K^{*0}\overline{K}^{*0})$ = (1.95$\pm$0.47($stat.$)$\pm$0.51($syst.$)$\pm$0.29($f_d/f_s$)) x 10$^{-5}$.LHCb-CONF-2011-019CERN-LHCb-CONF-2011-019oai:cds.cern.ch:13441312011-04-15 |
| spellingShingle | Particle Physics - Experiment The LHCb Collaboration First observation of the decay $B^0_s \to K^{*0} \overline{K}^{*0}$ |
| title | First observation of the decay $B^0_s \to K^{*0} \overline{K}^{*0}$ |
| title_full | First observation of the decay $B^0_s \to K^{*0} \overline{K}^{*0}$ |
| title_fullStr | First observation of the decay $B^0_s \to K^{*0} \overline{K}^{*0}$ |
| title_full_unstemmed | First observation of the decay $B^0_s \to K^{*0} \overline{K}^{*0}$ |
| title_short | First observation of the decay $B^0_s \to K^{*0} \overline{K}^{*0}$ |
| title_sort | first observation of the decay $b^0_s \to k^{*0} \overline{k}^{*0}$ |
| topic | Particle Physics - Experiment |
| url | http://cds.cern.ch/record/1344131 |
| work_keys_str_mv | AT thelhcbcollaboration firstobservationofthedecayb0stok0overlinek0 |