Standard model cross-over on the lattice

D'Onofrio, Michela; Rummukainen, Kari (2016). Standard model cross-over on the lattice. Physical review. D - particles, fields, gravitation, and cosmology, 93(2), 025003. American Physical Society 10.1103/PhysRevD.93.025003

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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)×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 ∼5  GeV. We measure the cross-over temperature from the maximum of the susceptibility of the Higgs condensate, with the result Tc=159.5±1.5  GeV. Outside of the narrow cross-over region the perturbative results agree well with nonperturbative ones.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

D'Onofrio, Michela

Subjects:

500 Science > 530 Physics

ISSN:

1550-7998

Publisher:

American Physical Society

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

15 Feb 2016 15:19

Last Modified:

16 Feb 2016 07:21

Publisher DOI:

10.1103/PhysRevD.93.025003

ArXiv ID:

1508.07161v1

BORIS DOI:

10.7892/boris.75454

URI:

https://boris.unibe.ch/id/eprint/75454

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