Flavor Phenomenology of the QCD Axion

by Dr Robert Ziegler (Karlsruhe Institute of Technology)

Wednesday 26 May 2021, 15:00 → 16:00 Europe/Rome

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I will discuss the possibility to search for the QCD axion with high-precision flavor facilities, complementary to the usual axion searches with helio- and haloscopes. After a short introduction to the strong CP problem and the QCD axion, I will summarize the bounds on the most general flavor-violating axion couplings. These constraints arise mainly from 2-body meson and lepton decays with missing energy, and could be substantially improved by dedicated searches at e.g. Belle-II. I will also discuss novel constraints on Hyperon decays with missing energy from SN1987A, which can provide the strongest limits on flavored dark sectors.

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ziegler.pdf