Journal article
Measurement of the mass and lifetime of the Ω−b baryon
- Abstract:
- A proton-proton collision data sample, corresponding to an integrated luminosity of 3 fb-1 collected by LHCb at √s=7 and 8 TeV, is used to reconstruct 63 ± 9 Ωb- → Ωc0π-, Ωc0 → pK-K-π+ decays. Using the Ξb- → Ξc0π-, Ξc0 → pK-K-π+ decay mode for calibration, the lifetime ratio and the absolute lifetime of the Ωb- baryon are measured to be τΩb-/τΞb- = 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.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Accepted manuscript, pdf, 485.0KB, Terms of use)
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- Publisher copy:
- 10.1103/PhysRevD.93.092007
Authors
- Publisher:
- American Physical Society
- Journal:
- Physical Review D More from this journal
- Volume:
- 93
- Issue:
- 9
- Publication date:
- 2016-05-01
- Acceptance date:
- 2016-04-27
- DOI:
- ISSN:
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2470-0029 and 2470-0010
- Keywords:
- Pubs id:
-
pubs:625332
- UUID:
-
uuid:9dc11e77-b72d-4429-8bf9-f09c4d2cb9d8
- Local pid:
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pubs:625332
- Source identifiers:
-
625332
- Deposit date:
-
2016-11-13
Terms of use
- Copyright holder:
- CERN
- Copyright date:
- 2016
- Notes:
- © 2016 CERN, for the LHCb Collaboration. This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
- Licence:
- CC Attribution (CC BY)
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