{
  "id": "1712.07428",
  "version": "v1",
  "published": "2017-12-20T11:49:04.000Z",
  "updated": "2017-12-20T11:49:04.000Z",
  "title": "Measurement of $CP$ asymmetry in $B_s^0 \\to D_s^{\\mp} K^{\\pm}$ decays",
  "authors": [
    "The LHCb collaboration"
  ],
  "comment": "All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2017-047.html",
  "categories": [
    "hep-ex"
  ],
  "abstract": "We report the measurements of the $CP$-violating parameters in $B_s^0 \\to D_s^{\\mp} K^{\\pm}$ decays observed in $pp$ collisions, using a data set corresponding to an integrated luminosity of $3.0\\,\\text{fb}^{-1}$ recorded with the LHCb detector. We measure $C_f = 0.73 \\pm 0.14 \\pm 0.05$, $A^{\\Delta \\Gamma}_f = 0.39 \\pm 0.28 \\pm 0.15$, $A^{\\Delta \\Gamma}_{\\overline{f}} = 0.31 \\pm 0.28 \\pm 0.15$, $S_f = -0.52 \\pm 0.20 \\pm 0.07$, $S_{\\overline{f}} = -0.49 \\pm 0.20 \\pm 0.07$, where the uncertainties are statistical and systematic, respectively. These parameters are used together with the world-average value of the $B_s^0$ mixing phase, $-2\\beta_s$, to obtain a measurement of the CKM angle $\\gamma$ from $B_s^0 \\to D_s^{\\mp} K^{\\pm}$ decays, yielding $\\gamma = (128\\,_{-22}^{+17})^\\circ$ modulo $180^\\circ$, where the uncertainty contains both statistical and systematic contributions. This corresponds to $3.8\\,\\sigma$ evidence for $CP$ violation in the interference between decay and decay after mixing.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-12-20T11:49:04.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "measurement",
      "world-average value",
      "lhcb detector",
      "ckm angle",
      "uncertainty contains"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}