Looking for the Higgs trilinear self-coupling via double and single Higgs production

by Giuseppe Degrassi (Rome)

Monday 9 Jul 2018, 16:30 → 17:30 Europe/Berlin

seminar room 2 (building 2A)

The discovery of the Higgs boson at the Large Hadron Collider (LHC) opened a new era in high-energy particle physics. The properties and interactions of this new particle are now actively studied. In the seminar I focus on the Higgs trilinear self-coupling. First, I discussing its precise extraction in the Standard Model from double Higgs production. In particular I discuss a new method to compute the virtual NLO QCD correction to this production cross section based on an expansion in the small transverse momentum of the Higgs. Then, I discuss the possibility of probing an anomalous trilinear coupling indirectly, through its effects in the production and decay of a single Higgs at the LHC and in the precision observables using the sensitivity of these observables to the Higgs self-coupling via loop effects.