Measurement of the mass and lifetime of the Ωb- baryon
A proton-proton collision data sample, corresponding to an integrated luminosity of 3fb−1 collected by LHCb at √s = 7 and 8 TeV, is used to reconstruct 63 ± 9 Ωb- → Ω0cπ−, Ω0c → pK−K−π+ decays. Using the Ξ−b → Ξ0cπ−, Ξ0c → pK−K−π+ decay mode for calibration, the lifetime ratio and the absolute life...
| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Journal article |
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American Physical Society
2016
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| _version_ | 1797076208097165312 |
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| author | Cheung, S Evans, T Gandini, P Hadavizadeh, T Harnew, N Jalocha, P John, M Lupton, O Malde, S Nandi, A Qian, W Qian, W Topp-Joergensen, S Wilkinson, G The LHCb Collaboration |
| author_facet | Cheung, S Evans, T Gandini, P Hadavizadeh, T Harnew, N Jalocha, P John, M Lupton, O Malde, S Nandi, A Qian, W Qian, W Topp-Joergensen, S Wilkinson, G The LHCb Collaboration |
| author_sort | Cheung, S |
| collection | OXFORD |
| description | A proton-proton collision data sample, corresponding to an integrated luminosity of 3fb−1 collected by LHCb at √s = 7 and 8 TeV, is used to reconstruct 63 ± 9 Ωb- → Ω0cπ−, Ω0c → pK−K−π+ decays. Using the Ξ−b → Ξ0cπ−, Ξ0c → pK−K−π+ decay mode for calibration, the lifetime ratio and the absolute lifetime of the Ω−b baryon are measured to be τΩ−b/τΞ−b = 1.11 ± 0.16 ± 0.03, τΩb− = 1.78 ± 0.26 ± 0.05 ± 0.06 ps, where the uncertainties are statistical, systematic and from the calibration mode (for τΩb- only). A measurement is also made of the mass difference, mΩb- − mΞb-, and the corresponding Ωb- mass, which yields mΩb- − mΞb- = 247.4 ±3.2 ±0.5 MeV/c2, mΩb- = 6045.1 ± 3.2 ± 0.5 ± 0.6 MeV/c2. These results are consistent with previous measurements. |
| first_indexed | 2024-03-07T00:00:52Z |
| format | Journal article |
| id | oxford-uuid:75e6d225-704b-46df-b78c-e1ea35b93d94 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T00:00:52Z |
| publishDate | 2016 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:75e6d225-704b-46df-b78c-e1ea35b93d942022-03-26T20:12:29ZMeasurement of the mass and lifetime of the Ωb- baryonJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:75e6d225-704b-46df-b78c-e1ea35b93d94Symplectic Elements at OxfordAmerican Physical Society2016Cheung, SEvans, TGandini, PHadavizadeh, THarnew, NJalocha, PJohn, MLupton, OMalde, SNandi, AQian, WQian, WTopp-Joergensen, SWilkinson, GThe LHCb CollaborationA proton-proton collision data sample, corresponding to an integrated luminosity of 3fb−1 collected by LHCb at √s = 7 and 8 TeV, is used to reconstruct 63 ± 9 Ωb- → Ω0cπ−, Ω0c → pK−K−π+ decays. Using the Ξ−b → Ξ0cπ−, Ξ0c → pK−K−π+ decay mode for calibration, the lifetime ratio and the absolute lifetime of the Ω−b baryon are measured to be τΩ−b/τΞ−b = 1.11 ± 0.16 ± 0.03, τΩb− = 1.78 ± 0.26 ± 0.05 ± 0.06 ps, where the uncertainties are statistical, systematic and from the calibration mode (for τΩb- only). A measurement is also made of the mass difference, mΩb- − mΞb-, and the corresponding Ωb- mass, which yields mΩb- − mΞb- = 247.4 ±3.2 ±0.5 MeV/c2, mΩb- = 6045.1 ± 3.2 ± 0.5 ± 0.6 MeV/c2. These results are consistent with previous measurements. |
| spellingShingle | Cheung, S Evans, T Gandini, P Hadavizadeh, T Harnew, N Jalocha, P John, M Lupton, O Malde, S Nandi, A Qian, W Qian, W Topp-Joergensen, S Wilkinson, G The LHCb Collaboration Measurement of the mass and lifetime of the Ωb- baryon |
| title | Measurement of the mass and lifetime of the Ωb- baryon |
| title_full | Measurement of the mass and lifetime of the Ωb- baryon |
| title_fullStr | Measurement of the mass and lifetime of the Ωb- baryon |
| title_full_unstemmed | Measurement of the mass and lifetime of the Ωb- baryon |
| title_short | Measurement of the mass and lifetime of the Ωb- baryon |
| title_sort | measurement of the mass and lifetime of the ωb baryon |
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