Lattice QCD for Cosmology

Understand

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.