• Open Access

Measurement of the mass and lifetime of the Ωb baryon

R. Aaij et al. (LHCb Collaboration)
Phys. Rev. D 93, 092007 – Published 19 May 2016

Abstract

A proton-proton collision data sample, corresponding to an integrated luminosity of 3fb1 collected by LHCb at s=7 and 8 TeV, is used to reconstruct 63±9 ΩbΩc0π, Ωc0pKKπ+ decays. Using the ΞbΞc0π, Ξc0pKKπ+ 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±0.06ps, where the uncertainties are statistical, systematic and from the calibration mode (for τΩb only). A measurement is also made of the mass difference, mΩbmΞb, and the corresponding Ωb mass, which yields mΩbmΞb=247.4±3.2±0.5MeV/c2, mΩb=6045.1±3.2±0.5±0.6MeV/c2. These results are consistent with previous measurements.

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  • Received 7 April 2016

DOI:https://doi.org/10.1103/PhysRevD.93.092007

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.

© 2016 CERN, for the LHCb Collaboration

Physics Subject Headings (PhySH)

  1. Research Areas
  1. Physical Systems
  1. Properties
  1. Techniques
Particles & Fields

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Vol. 93, Iss. 9 — 1 May 2016

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