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Lattice QCD for Cosmology

descriptionPublicationkeyboard_double_arrow_right Article , Preprint 01 Jan 2016Embargo end date: 01 Jan 2016 Germany Publisher:arXiv

Authors: Borsanyi, Sz.; Fodor, Z.; Ringwald, A.; Szabo, K. K.; Kampert, K. H.; Katz, S. D.; Kawanai, T.; +5 Authors

doi: 10.48550/arxiv.1606.07494

arXiv: http://arxiv.org/abs/1606.07494

Lattice QCD for Cosmology

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Abstract

We present a full result for the equation of state (EoS) in 2+1+1 (up/down, strange and charm quarks are present) flavour lattice QCD. We extend this analysis and give the equation of state in 2+1+1+1 flavour QCD. In order to describe the evolution of the universe from temperatures several hundreds of GeV to several tens of MeV we also include the known effects of the electroweak theory and give the effective degree of freedoms. As another application of lattice QCD we calculate the topological susceptibility (chi) up to the few GeV temperature region. These two results, EoS and chi, can be used to predict the dark matter axion's mass in the post-inflation scenario and/or give the relationship between the axion's mass and the universal axionic angle, which acts as a initial condition of our universe.

pdflatex, 40 figures; Section on experimental setups added, small corrections

Country

Germany

Related Organizations

Helmholtz Association of German Research Centres
Germany
Deutsches Elektronen-Synchrotron DESY
Germany

Keywords

High Energy Physics - Phenomenology, High Energy Physics - Lattice, Cosmology and Nongalactic Astrophysics (astro-ph.CO), High Energy Physics - Phenomenology (hep-ph), High Energy Physics - Lattice (hep-lat), FOS: Physical sciences, Astrophysics - Cosmology and Nongalactic Astrophysics

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