Weekly seminars

Investigating the top-quark scale and scheme uncertainties in Higgs pair production at the LHC (remote talk)

by Julien Baglio (CERN)

Europe/Paris
Virtual seminar (LAPTh)

Virtual seminar

LAPTh

Description

One of the highlighted goals of the high-luminosity Large Hadron Collider is the probe of the Higgs potential and of the triple Higgs coupling, in particular through the production of Higgs-boson pairs via gluon fusion. This process is loop-induced already at leading order and higher-order QCD corrections are especially important to obtain meaningful predictions for the production cross sections and differential observables. This talk will present the calculation of the next-to-leading order (NLO) QCD corrections to the total cross section and to the invariant Higgs-pair-mass distribution, including the full top-quark mass effects in the two-loop virtual corrections. The impact of the definition of the top-quark scheme for the calculation of the virtual corrections will be discussed, as an illustrative example of a sizable source of theoretical uncertainties not only in this process but also in other relevant channels at the LHC.