Composite Quarks, Leptons, and Higgs: Flavor Signatures of a Preon Theory with Amartya Sengupta

We discuss a renormalizable composite/preon model in which the Standard Model quarks, leptons, and the Higgs arise as bound states of an underlying confining chiral gauge theory. Symmetries and large-N power counting naturally suppress baryon-number violation, allowing compositeness scales as low as 10^{4} TeV while remaining consistent with proton-decay bounds. We focus on the flavour structure of the model, where the same Yukawa couplings that generate the observed fermion masses and quark mixing also induce a broad class of flavour- and precision-sensitive effects. This makes low-energy observables a powerful and complementary probe of compositeness, in some cases reaching beyond the usual proton-decay benchmark.

This lecture was made possible by the William C. Ferguson Fund.