Standard model cross-over on the lattice

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http://hdl.handle.net/10138/159845

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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

Title: Standard model cross-over on the lattice
Author: D'Onofrio, Michela; Rummukainen, Kari
Contributor: University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Department of Physics
Date: 2016-01-07
Language: eng
Number of pages: 12
Belongs to series: Physical Review D
ISSN: 2470-0010
URI: http://hdl.handle.net/10138/159845
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.
Subject: ELECTROWEAK PHASE-TRANSITION
HIGH-TEMPERATURE
DIMENSIONAL REDUCTION
FINITE-TEMPERATURE
NONPERTURBATIVE ANALYSIS
QUANTUM CHROMODYNAMICS
HIGGS THEORIES
GAUGE-THEORIES
O(A) ERRORS
FIELD
114 Physical sciences
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