{
  "id": "2109.06201",
  "version": "v1",
  "published": "2021-09-13T18:00:03.000Z",
  "updated": "2021-09-13T18:00:03.000Z",
  "title": "B-Anomalies from flavorful U(1)' extensions, safely",
  "authors": [
    "Rigo Bause",
    "Gudrun Hiller",
    "Tim Höhne",
    "Daniel F. Litim",
    "Tom Steudtner"
  ],
  "comment": "22 pages, 15 figures",
  "categories": [
    "hep-ph"
  ],
  "abstract": "$U(1)^\\prime$ extensions of the standard model with generation-dependent couplings to quarks and leptons are investigated as an explanation of anomalies in rare $B$-decays, with an emphasis on stability and predictivity up to the Planck scale. To these ends, we introduce three generations of vector-like standard model singlet fermions, an enlarged, flavorful scalar sector, and, possibly, right-handed neutrinos, all suitably charged under the $U(1)^\\prime$ gauge interaction. We identify several gauge-anomaly free benchmarks consistent with $B_s$-mixing constraints, with hints for electron-muon universality violation, and the global $b \\to s$ fit. We further investigate the complete two-loop running of gauge, Yukawa and quartic couplings up to the Planck scale to constrain low-energy parameters and enhance the predictive power. A characteristic of models is that the $Z^\\prime$ with TeV-ish mass predominantly decays to invisibles, i.e. new fermions or neutrinos. $Z^\\prime$-production can be studied at a future muon collider. While benchmarks feature predominantly left-handed couplings $C_9^{\\mu}$ and $C_{10}^{\\mu}$, right-handed ones can be accommodated as well.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2021-09-13T18:00:03.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "extensions",
      "planck scale",
      "b-anomalies",
      "vector-like standard model singlet fermions",
      "gauge-anomaly free benchmarks consistent"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 22,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}