Higgs pair production and the top-quark scheme uncertainty at the LHC

by Dr Julien Baglio (University of Tübingen (DE))

Wednesday 7 Nov 2018, 11:00 → 12:00 Europe/Zurich

Aula Caldirola (Dipartimento di Fisica, Università degli Studi di Milano)

Since the discovery of a Higgs boson in 2012 at CERN, accessing its properties is one of the main goals of the Large Hadron Collider (LHC) experimental collaborations. The triple Higgs coupling in particular is a primary target as it would be a direct probe of the shape of the scalar potential at the origin of the electroweak-symmetry-breaking mechanism, and is directly accessed via the production of a pair of Higgs bosons. In this view, it is of utmost importance to reach high precision in the theoretical prediction of Higgs boson pair production at the LHC. I will present in this talk the calculation of the 2-loop QCD corrections in Higgs pair production via gluon fusion, the main production mechanism, including the top-quark mass effects in the loop. It will be shown that they can be significant in differential distributions. Top-quark scheme uncertainties will also be discussed.

baglio_hh_mailand_2018.pdf