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Standard model cross-over on the lattice

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  • Additional Information
    • Contributors:
      Helsinki Institute of Physics; Department of Physics
    • Publication Information:
      American Physical Society
    • Publication Date:
      2016
    • Collection:
      Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto
    • Abstract:
      With the physical Higgs mass the standard model symmetry restoration phase transition is a smooth cross-over. We study the thermodynamics of the cross-over using numerical lattice Monte Carlo simulations of an effective SU(2) x U(1) gauge + Higgs theory, significantly improving on previously published results. We measure the Higgs field expectation value, thermodynamic quantities like pressure, energy density, speed of sound and heat capacity, and screening masses associated with the Higgs and Z fields. While the cross-over is smooth, it is very well defined with a width of only similar to 5 GeV. We measure the cross-over temperature from the maximum of the susceptibility of the Higgs condensate, with the result T-c = 159.5 +/- 1.5 GeV. Outside of the narrow cross-over region the perturbative results agree well with nonperturbative ones. ; Peer reviewed
    • File Description:
      application/pdf
    • Relation:
      We thank Mikko Laine for discussions. This work has been supported by the Magnus Ehrnrooth Foundation (MD), by the Finnish Academy through Grants No. 1134018 and No. 1267286, and by the Swiss National Science Foundation (SNF) under Grant No. 200021-146737. Part of the numerical work has been performed using the resources at the Finnish IT Center for Science, CSC.; D'Onofrio , M & Rummukainen , K 2016 , ' Standard model cross-over on the lattice ' , Physical Review D , vol. 93 , no. 2 , 025003 . https://doi.org/10.1103/PhysRevD.93.025003; ORCID: /0000-0003-2266-4716/work/38183500; http://hdl.handle.net/10138/159845; 2300d8d0-7052-4473-8c5e-c275eee681ee; 84955462120; 000367675100007
    • Online Access:
      http://hdl.handle.net/10138/159845
    • Rights:
      cc_by ; info:eu-repo/semantics/openAccess ; openAccess
    • Accession Number:
      edsbas.E49DEC1