XIIth Quark Confinement and the Hadron Spectrum

Recent progress on QCD inputs for axion phenomenology

29 Aug 2016, 18:45

20m

Amfitrion I (Makedonia Palace)

Section E: QCD and New Physics Section E

Speaker

Massimo D'Elia (University of Pisa)

Description

The properties of the QCD axion are strictly related to the
dependence of the theory on the topological parameter theta.
We will present a determination of the topological properties of QCD for
temperatures up to around 600MeV, obtained by lattice QCD simulations
with 2+1 flavors and physical quark masses. Numerical results for
the topological susceptibility, when compared to instanton gas
computations, differ both in size and in the temperature dependence.
We will discuss the implications of such findings for axion
phenomenology.

Summary

The properties of the QCD axion are strictly related to the
dependence of the theory on the topological parameter theta.
We will present a determination of the topological properties of QCD for
temperatures up to around 600MeV, obtained by lattice QCD simulations
with 2+1 flavors and physical quark masses. Numerical results for
the topological susceptibility, when compared to instanton gas
computations, differ both in size and in the temperature dependence.
We will discuss the implications of such findings for axion
phenomenology.

Presentation materials

confinement12.pdf