External Seminar by Sebastian Jaeger

Thursday 4 Nov 2021, 14:00 → 15:00 Europe/London

Title
Composite Higgs and unification

Abstract:
Higgs compositeness is an attractive possibility for making the electroweak scale natural, and together with partial fermion compositeness may explain the observed quark flavour patterns. In this talk I revisit composite Higgs models from the perspective of gauge coupling unification as well as quark-lepton unification, and the conditions on symmetries and fermion partner embeddings following from either requirement. I describe a minimal pNGB Higgs model based on SO(11)/SO(10) which - unlike some unified models in the literature - preserves gauge coupling unification. The model incorporates a conserved baryon number, custodial protection for the T-parameter and the Zbb coupling, and achieves a viable EWPT and LHC phenomenology with a lowish symmetry-breaking scale f ~ 1.5 TeV. Requiring these features essentially fixes the fermion embedding. The model automatically features a vector leptoquark of the sort hinted at by the B-physics.

Zoom link:  IPPP Seminars (Thursday at 2 pm UK time)

https://durhamuniversity.zoom.us/j/99420124988?pwd=ZEFLSDB3THJtaWZOTU54R25mT1NuZz09

Meeting ID: 994 2012 4988