Theory Division

When a particle is accelerated, as in a scattering event, it will radiate gravitons and, if electrically charged, photons. The infrared tail of the spectrum of this radiation has a divergence: an arbitrarily small amount of total energy is divided into an arbitrarily large number of radiated bosons. Each of these in turn carries a... More »

With the discovery of the Higgs boson, the LHC has entered an era of precision Higgs physics. The precision determination of the properties of the Higgs boson provides an excellent window into potential new physics. High precision predictions for Higgs boson observables are therefore essential for the future LHC Higgs physics program. This requires highly... More »

Neutrino trident scattering is the production of a charged lepton pair in the coulomb field of a nucleus. It is a rare but observable process expected to occur at near detectors of neutrino oscillation experiments. In this talk, I will revisit the calculation of the trident scattering rate, addressing certain inconsistencies in the literature and presenting revised... More »

Varying Yukawas open new possibilities for electroweak baryogenesis. In this talk I will start by introducing varying Yukawas as a source of CP-violation and explain how baryogenesis can be successful in this framework. I will then present a realization of this paradigm in Composite Higgs models with partial compositeness. Composite Higgs models are, apart from... More »

Perturbative calculations for many collider observables suffer from large logarithmic corrections associated with soft emissions or radiation collinear to beam or jet directions. Resummation using SCET techniques is based on factorisation theorems, and requires the calculation of jet, soft and beam functions to some perturbative accuracy. This task has up to now mainly been achieved... More »