INFN-LNF Laboratori Nazionali di Frascati
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14:30
Physics of θ-Vacua and Inevitability of Axions in Standard Model and Gravity.
Speaker: Gia Dvali (LMU and MPP. Munich) In this talk we first review why the CP-violating θ-vacuum is a built-in feature of QCD and how the mass of the η′-meson provides a direct experimental evidence for it. We then explain how the axion protects CP dynamically and define the axion-quality measure. This discussion, in particular, …
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