Jul 26 – 30, 2021
US/Eastern timezone

S parameter from a prototype composite-Higgs model

Jul 29, 2021, 2:30 PM
Oral presentation Particle physics beyond the Standard Model Particle physics beyond the Standard Model


Yigal Shamir (Tel Aviv University)


We calculate the low-energy constant $L_{10}$ in an SU(4) lattice gauge theory
with dynamical fermions in two representations. This theory is close to a particular composite-Higgs model. From this, we obtain the contribution of the new strong sector to the S parameter. The resulting upper bound on the vacuum misalignment parameter $\xi$ is similar to current estimates for this bound. We outline future directions for lattice calculations in near-conformal composite-Higgs models.

Primary author

Yigal Shamir (Tel Aviv University)


Maarten Golterman (San Francisco State University) William Jay (Fermi National Accelerator Laboratory) Ethan Neil (University of Colorado Boulder) Benjamin Svetitsky (Tel Aviv University)

Presentation materials