{
  "id": "1909.04639",
  "version": "v1",
  "published": "2019-09-10T17:32:23.000Z",
  "updated": "2019-09-10T17:32:23.000Z",
  "title": "Universality driven analytic structure of QCD crossover: radius of convergence in baryon chemical potential",
  "authors": [
    "Swagato Mukherjee",
    "Vladimir Skokov"
  ],
  "comment": "5 pages, 2 figures",
  "categories": [
    "hep-ph",
    "hep-lat",
    "nucl-th"
  ],
  "abstract": "Recent lattice QCD calculations show strong indications that the chiral crossover of QCD at zero baryon chemical potential \\mu_B is a remnant of the second order chiral phase transition. Furthermore, the non-universal parameters needed to map temperature T and \\mu_B to the universal properties of the second order chiral phase transition have been determined recently. Motivated by these observations, first, we determine the analytic structure of the partition function -- the so-called Yang-Lee edge singularity -- in the QCD crossover regime, solely based on universal properties. Next, utilizing the lattice QCD results for non-universal parameters we map this singularity to the real T and complex \\mu_B plane, leading to the determination of the radius of convergence in \\mu_B in the QCD crossover regime. These universality- and QCD-based results provide tight constraints on the range of validity of the lattice QCD calculations at \\mu_B>0. Implication of this result on the location of the conjectured QCD critical point is discussed.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-09-10T17:32:23.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "universality driven analytic structure",
      "baryon chemical potential",
      "second order chiral phase transition",
      "lattice qcd calculations",
      "qcd crossover regime"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}