Lattice QCD for Cosmology
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.
Cite
@article{arxiv.1606.07494,
title = {Lattice QCD for Cosmology},
author = {Sz. Borsanyi and Z. Fodor and K. H. Kampert and S. D. Katz and T. Kawanai and T. G. Kovacs and S. W. Mages and A. Pasztor and F. Pittler and J. Redondo and A. Ringwald and K. K. Szabo},
journal= {arXiv preprint arXiv:1606.07494},
year = {2016}
}
Comments
pdflatex, 40 figures; Section on experimental setups added, small corrections