The QCD axion, precisely

Date: 19 January 2016

Speaker: Giovanni Villadoro (ICPT)

Title: The QCD axion, precisely

Abstract: The QCD axion is probably the most robust solution to the strong CP problem and a natural dark matter candidate. While its properties, such as the mass and the couplings, are mostly determined by non-perturbative QCD effects I will present recent computations demonstrating that they can be safely extracted with percent accuracy, which is important for the theory interpretation of experimental results. I will also present some recent lattice QCD results highlighting a large departure from the usual instanton estimates and changing substantially the prediction for the axion relic abundance.

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