{
  "id": "nucl-th/9510045",
  "version": "v1",
  "published": "1995-10-23T07:28:17.000Z",
  "updated": "1995-10-23T07:28:17.000Z",
  "title": "Muons and emissivities of neutrinos in neutron star cores",
  "authors": [
    "O. Elgaroy",
    "L. Engvik",
    "E. Osnes",
    "F. V. De Blasio",
    "M. Hjorth-Jensen",
    "G. Lazzari"
  ],
  "comment": "14 pages, Revtex style, 3 uuencoded figs included",
  "journal": "Phys.Rev.Lett. 76 (1996) 1994-1997",
  "doi": "10.1103/PhysRevLett.76.1994",
  "categories": [
    "nucl-th"
  ],
  "abstract": "In this work we consider the role of muons in various URCA processes relevant for neutrino emissions in the core region of neutron stars. The calculations are done for $\\beta$--stable nuclear matter with and without muons. We find muons to appear at densities $\\rho = 0.15$ fm$^{-3}$, slightly around the saturation density for nuclear matter $\\rho_0 =0.16$ fm$^{-3}$. The direct URCA processes for nucleons are forbidden for densities below $\\rho = 0.5$ fm$^{-3}$, however the modified URCA processes with muons $(n+N\\rightarrow p+N +\\mu +\\overline{\\nu}_{\\mu}, p+N+\\mu \\rightarrow n+N+\\nu_{\\mu}$), where $N$ is a nucleon, result in neutrino emissivities comparable to those from $(n+N\\rightarrow p+N +e +\\overline{\\nu}_e, p+N+e \\rightarrow n+N+\\nu_e$). This opens up for further possibilities to explain the rapid cooling of neutrons stars. Superconducting protons reduce however these emissivities at densities below $0.4$ fm$^{-3}$.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1995-10-23T07:28:17.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "neutron star cores",
      "direct urca processes",
      "urca processes relevant",
      "neutrino emissivities",
      "superconducting protons reduce"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "RevTeX",
      "pages": 14,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 401275
    }
  }
}