Speaker
Pablo Quilez
(University of California San Diego)
Description
How many QCD axions can there be? Can the standard ma-fa relation be modified without extra sources of PQ breaking? We will study in detail the possible masses and couplings to the nEDM of a multiple axion system. A novel sum rule linking multiple axion signals will be obtained and rigorously proved solely as a consequence of the PQ symmetry.
Based on: 2305.15465 [hep-ph] in collaboration with Belen Gavela and Maria Ramos.