Strong dynamics beyond the Standard Model

In this research programme, we investigate possible microscopic structure of the Higgs boson, as well as alternative mechanisms for the electroweak symmetry breaking and the generation of flavours. Employing techniques of Lattice Gauge Theory, non-perturbative studies of quantum field theories that may lead to the composite-Higgs scenario can be performed. This research avenue contains at least the two following directions:

  • The dilaton Higgs boson
  • Our group were involved in research activities for the search of gauge theories with infrared conformal fixed points. In particular, we investigated the running coupling constant for SU(3) gauge theory coupled to 12 fundamental-representation fermions, employing the twisted-Polyakov-loop scheme and the gradient-flow scheme. In addition, we are currently studying the chiral phase transition in SU(2) gauge theory with 8 flavours by comparing lattice-simulation results to predictions from random matrix theory.

  • The Goldstone Higgs boson
  • With colleagues in Swansea and Pusan, we are performing lattice simulations for possible novel strong-interaction theories that can be used in constructing models for the vacuum-misalignment scenario. In particular, we have been concentrating on Sp(4) gauge theory.