IFIC seminar: Testing unification and the heterotic string with the axion-photon coupling

por Mario Reig (CERN)

martes 18 nov. 2025 12:00 → 14:00 Europe/Madrid

1001-Primera-1-1-1 - Paterna. Seminario (Universe)

The topological nature of axion couplings to gauge bosons offers unique opportunities to obtain information about the UV limit of the SM. I will discuss why the discovery of an axion-like particle above the QCD line would rule out grand unified theories and the perturbative heterotic string. Based on 2206.07053, 2410.03820 and 2509.08042.