CANCELLED! (due to Emergency Level 3) IFIC Seminar: Unitarity triangle angles explained: a predictive new quark mass matrix texture

by Paul Harrison (Warwick University)

Tuesday 4 Mar 2025, 12:00 → 14:00 Europe/Madrid

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

We propose a novel quark mass matrix texture-pair with five free parameters, which fits the four quark mass ratios ms/mb, md/mb, mc/mt, mu/mt, and the four CKM quark mixing observables. The matrices each have one texture zero, but the main innovation here is a "geometric" ansatz exploiting a pair of small complex expansion parameters, based on the geometry of the Unitarity Triangle. The fit to the observables is in good agreement with current experimental values renormalised to ~10^4 TeV, and offers decisive tests against future high-precision measurements of the unitarity triangle angles at the weak scale. We identify two novel symmetries of these mass matrices which explain the phenomenologically-successful relations alpha=pi/2 and beta=pi/8.