The QCD axion, precisely

• DOI: 10.1007/jhep01(2016)034
• Publication Date: 2016-01-09T03:42:12Z
• Authors: Giovanni Grilli d...; Edward Hardy; Javier Pardo Vega; Giovanni Villadoro
• Keywords: Instanton

We show how several properties of the QCD axion can be extracted at high precision using only first principle computations. By combining NLO results obtained in chiral perturbation theory with recent Lattice full potential, its mass and coupling to photons reconstructed percent precision. Axion couplings nucleons also derived reliably, uncertainties smaller than ten percent. The approach presented here allows further improved as on light quark masses effective are reduced. compute finite temperature dependence potential up crossover region. For higher we point out unreliability conventional instanton study impact computation relic abundance.