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High Energy Physics - Lattice

arXiv:1606.07494 (hep-lat)
[Submitted on 23 Jun 2016 (v1), last revised 27 Jun 2016 (this version, v2)]

Title:Lattice QCD for Cosmology

Authors:Sz. Borsanyi, Z. Fodor, K. H. Kampert, S. D. Katz, T. Kawanai, T. G. Kovacs, S. W. Mages, A. Pasztor, F. Pittler, J. Redondo, A. Ringwald, K. K. Szabo
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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.
Comments: pdflatex, 40 figures; Section on experimental setups added, small corrections
Subjects: High Energy Physics - Lattice (hep-lat); Cosmology and Nongalactic Astrophysics (astro-ph.CO); High Energy Physics - Phenomenology (hep-ph)
Report number: DESY 16-105
Cite as: arXiv:1606.07494 [hep-lat]
  (or arXiv:1606.07494v2 [hep-lat] for this version)
  https://doi.org/10.48550/arXiv.1606.07494

Submission history

From: Szabolcs Borsanyi [view email]
[v1] Thu, 23 Jun 2016 21:55:26 UTC (470 KB)
[v2] Mon, 27 Jun 2016 15:04:19 UTC (1,014 KB)
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