{
  "id": "hep-ex/9802002",
  "version": "v1",
  "published": "1998-01-31T21:50:34.000Z",
  "updated": "1998-01-31T21:50:34.000Z",
  "title": "Measurements of the B^0_s and Λ_b Lifetimes",
  "authors": [
    "The OPAL Collaboration",
    "K. Ackerstaff et al"
  ],
  "comment": "21 pages, LaTeX, uses a4p.sty, 4 eps figures included, submitted to Phys. Lett. B",
  "journal": "Phys.Lett.B426:161-179,1998",
  "doi": "10.1016/S0370-2693(98)00289-5",
  "categories": [
    "hep-ex"
  ],
  "abstract": "This paper presents updated measurements of the lifetimes of the B^0_s meson and the \\Lambda_b baryon using 4.4 million hadronic Z^0 decays recorded by the OPAL detector at LEP from 1990 to 1995. A sample of B^0_s decays is obtained using D_s^- \\ell^+ combinations, where the D_s^- is fully reconstructed in the \\phi \\pi^-, K^*0 K^- and K^- K^0_S decay channels and partially reconstructed in the \\phi \\ell^- \\nu(bar) X decay mode. A sample of \\Lambda_b decays is obtained using \\Lambda_c^+ \\ell^- combinations, where the \\Lambda_c^+ is fully reconstructed in its decay to a p K^- \\pi^+ final state and partially reconstructed in the \\Lambda \\ell^+ \\nu X decay channel. From 172 +/- 28 D_s^- \\ell^+ combinations attributed to B^0_s decays, the measured lifetime is \\tau(B^0_s) = 1.50 +0.16 -0.15 +/- 0.04 ps, where the errors are statistical and systematic, respectively. From the 129 +\\- 25 \\Lamda_c^+ \\ell^- combinations attributed to \\Lambda_b decays, the measured lifetime \\tau(\\Lambda_b) = 1.29 +0.24 -0.22 +/- 0.06 ps, where the errors are statistical and systematic, respectively.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1998-01-31T21:50:34.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "measurements",
      "decay channel",
      "measured lifetime",
      "million hadronic",
      "combinations"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "LaTeX",
      "pages": 21,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 453562
    }
  }
}