Conveners
Plenary 2
- Johannes Bluemlein (DESY)
Plenary 2
- Johannes Bluemlein (DESY)
In this talk I will discuss the computation of the top quark mass
dependence of NNLO double Higgs boson production, including both the real
and virtual contributions. The dependence is computed in the large top
quark mass limit, which gives a good approximation of the exact cross
section below the top quark production threshold.
We discuss the complete computation of the mixed QCD–EW corrections to lepton- pair production via the Drell-Yan mechanism. We present results for fiducial cross sections and differential distributions to both the neutral current- and charged current- process. In particular, for the neutral current case, we report on the first result at this order that is valid in the entire region of dilepton...
We calculate the two-loop QCD corrections to Higgs boson pair production
in gluon fusion within Standard Model Effective Field Theory (SMEFT),
including also squared dimension-6 operators and double insertions of
operators. The different options to truncate the EFT expansion are
contrasted to a non-linear EFT approach (HEFT) and the effects are
illustrated with several phenomenological examples.
In my talk I will present recent advances in our ability to expand perturbative scattering cross sections around collinear limits. This technique allows to connect universal ingredients like Beam Functions and Fragmentation Functions with technology used in the computation fixed order cross section. Furthermore, collinear expansions may serve as a powerful approximation of particle physics...
We pursue a no-compromise approach to the gamma5 problem of dimensional regularization. gamma5 is treated in the 't Hooft/Veltman/Breitenlohner/Maison scheme, which is mathematically rigorous but which breaks gauge invariance. As a result, a correct renormalization procedure based on this scheme involves three specific kinds of counterterms: cancelling UV singularities requires (1)...
The dynamics of binary black hole and neutron star systems in the early inspiral phase are well described by a post-Newtonian expansion in small velocities and weak coupling. Adopting nonrelativistic effective field theory techniques known from quarkonium systems this expansion can be formulated in terms of multiloop Feynman diagrams. I discuss results for the complete fifth and partial sixth...
