{
  "id": "1511.03290",
  "version": "v1",
  "published": "2015-11-10T21:07:24.000Z",
  "updated": "2015-11-10T21:07:24.000Z",
  "title": "$\\bar{B}\\rightarrow D^{(\\ast)}τ\\barν$ excesses in ALRSM constrained from $B$, $D$ decays and $D^{0}-\\bar{D}^{0}$ mixing",
  "authors": [
    "Chandan Hati",
    "Girish Kumar",
    "Namit Mahajan"
  ],
  "comment": "10 pages, 10 figures",
  "categories": [
    "hep-ph",
    "hep-ex"
  ],
  "abstract": "Recent experimental results from the LHCb, BaBar and Belle collaborations on the semitauonic decays of $B$ meson, $\\bar{B}\\rightarrow D^{(\\ast)}\\tau \\bar{\\nu}$, showing a significant deviation from the Standard Model (SM), hint towards a new physics scenario beyond the SM. In this work, we show that these enhanced decay rates can be explained within the framework of $E_{6}$ motivated Alternative Left-Right Symmetric Model (ALRSM), which has been successful in explaining the recent CMS excesses and has the feature of accommodating high scale leptogenesis. The R-parity conserving couplings in ALRSM can contribute universally to both $\\bar{B}\\rightarrow D \\tau \\bar{\\nu}$ and $\\bar{B}\\rightarrow D^{(\\ast)}\\tau \\bar{\\nu}$ via the exchange of scalar leptoquarks. We study the leptonic decays $D_{s}^{+} \\rightarrow \\tau^{+} \\bar{\\nu}$, $B^{+}\\rightarrow \\tau^{+} \\bar{\\nu}$, $D^{+}\\rightarrow \\tau^{+} \\bar{\\nu}$ and $D^{0}$-$\\bar{D}^{0}$ mixing to constrain the couplings involved in explaining the enhanced $B$ decay rates and we find that ALRSM can explain the current experimental data on $\\mathcal{R}(D^{(\\ast)})$ quite well while satisfying these constraints.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-11-10T21:07:24.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "accommodating high scale leptogenesis",
      "current experimental data",
      "motivated alternative left-right symmetric model",
      "enhanced decay rates",
      "experimental results"
    ],
    "publication": {
      "doi": "10.1007/JHEP01(2016)117",
      "journal": "Journal of High Energy Physics",
      "year": 2016,
      "month": "Jan",
      "volume": 2016,
      "pages": 117
    },
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2016JHEP...01..117H",
      "inspire": 1403985
    }
  }
}