Flavorful Probes of New Physics

          @misc{ scivideos_PIRSA:25040105,
            doi = {10.48660/25040105},
            url = {https://pirsa.org/25040105},
            author = {Fraser, Katherine},
            keywords = {Particle Physics},
            language = {en},
            title = {Flavorful Probes of New Physics},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2025},
            month = {apr},
            note = {PIRSA:25040105 see, \url{https://scivideos.org/index.php/pirsa/25040105}}
          }
          

Abstract

Measurements of the flavor structure of the Standard Model can be precise probes of physics beyond it. In this talk, we describe two implications of various flavor physics measurements. First, we discuss the use of Froggatt-Nielsen (FN) models for explaining the Standard Model flavor hierarchy. We define wrinkles, extra suppression or enhancement factors which modify the expected scaling of coupling sizes from FN models. We show how wrinkles can change the expected size of couplings to new physics in FN models, and how they naturally appear in various models, as well as discuss the example of the recent B->K\nu\nu measurement. In the second half of this talk, we use a SMEFT approach to illustrate the complementarity between future muon colliders and precision experiments for probing lepton flavor violation.