Constraining New Physics at the
LHC

Abstract

We analyse constraints that can be placed on CP-violating operators in the dimension-six Standard Model Effective Field Theory. We consider the associated production of a Higgs boson and a photon in weak boson fusion. We construct an asymmetry in a CP-sensitive observable which we use to analyse the sensitivity of this channel to possible CP violation. Additionally, we constrain CP-violating charged and neutral anomalous triple gauge couplings with diboson and VBF production at the LHC. We analyse charged triple gauge couplings in the dimension-six Standard Model Effective Field Theory using asymmetries to place constraints of CP-violating Wilson coefficients. For neutral triple gauge couplings we present bounds in terms of a general anomalous coupling framework using high energy transverse momentum bins. Finally, we consider next-to-leading order electroweak virtual corrections to +jets production at the LHC. We investigate the ability of a neural network to learn electroweak -factors for partonic channels with two, three and four final partons.