Standard Model thermodynamics across the electroweak crossover

Laine, Mikko Sakari; Meyer, M. (2015). Standard Model thermodynamics across the electroweak crossover. Journal of cosmology and astroparticle physics, 2015(07), 035-035. Institute of Physics Publishing IOP 10.1088/1475-7516/2015/07/035

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Even though the Standard Model with a Higgs mass mH = 125GeV possesses no bulk phase transition, its thermodynamics still experiences a "soft point" at temperatures around T = 160GeV, with a deviation from ideal gas thermodynamics. Such a deviation may have an effect on precision computations of weakly interacting dark matter relic abundances if their mass is in the few TeV range, or on leptogenesis scenarios operating in this temperature range. By making use of results from lattice simulations based on a dimensionally reduced effective field theory, we estimate the relevant thermodynamic functions across the crossover. The results are tabulated in a numerical form permitting for their insertion as a background equation of state into cosmological particle production/decoupling codes. We find that Higgs dynamics induces a non-trivial "structure" visible e.g. in the heat capacity, but that in general the largest radiative corrections originate from QCD effects, reducing the energy density by a couple of percent from the free value even at T > 160GeV.

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:

Laine, Mikko Sakari

Subjects:

500 Science > 530 Physics

ISSN:

1475-7516

Publisher:

Institute of Physics Publishing IOP

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

28 Aug 2015 07:48

Last Modified:

28 Aug 2015 07:48

Publisher DOI:

10.1088/1475-7516/2015/07/035

ArXiv ID:

1503.04935v2

BORIS DOI:

10.7892/boris.71295

URI:

https://boris.unibe.ch/id/eprint/71295

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