Theory Division

On-shell methods have been shown to be a powerful tool to compute higher-point and loop amplitudes. However, most of the time we hear about the applications for renormalizable theories. In this talk, I will give an introduction to spinors and to (massless/massive) amplitudes and show that we can indeed apply these methods for general effective field... More »

The study of the Higgs boson properties is one of the main tasks of contemporary high-energy physics. At the LHC, gluon fusion is the main production channel of Higgs bosons, and mixed QCD-electroweak corrections represent one of the main sources of theoretical uncertainty for such process, known until few years ago only at leading order... More »

The observation of neutrinoless double beta decay would have far-reaching consequences for particle physics. Most prominently, it would give a hint on the origin of neutrino masses and on the scale at which they are generated. We will discuss the effective description of non-standard mechanisms triggering neutrinoless double beta decay and the implications of their... More »

In this talk I will discuss computations of NLO virtual corrections to four-point gluon-fusion processes; in particular the production of HH, ZH and ZZ. Recently these processes have been computed numerically, but they are not known analytically. I will discuss how one can perform an expansion of these amplitudes in the high-energy limit, and improve the resulting series through the... More »

Nature is such that Maximal Entangled states exist”. This conjecture is based on the fact that we not only observe maximal entanglement in several physical processes but also we are able to verify that local realism can not describe quantum mechanics. We go a step further and suggest the possibility that maximal entanglement plays a... More »

There are two canonical approaches to treating the Standard Model as an effective field theory: the Standard Model EFT (SMEFT), respecting the full electroweak gauge symmetry, and the Higgs EFT (HEFT), respecting only electromagnetism. Of these, SMEFT has become the predominant framework for interpreting LHC Higgs data and exploring the systematics of effective field theory.... More »

From critical phenomena to quantum gravity, conformal field theories describe the universal scale-invariant structures that lie at the heart of theoretical physics. The conformal bootstrap is the powerful idea, dating back to the 70’s, that one can use fundamental consistency conditions to constrain, solve, and map out the space of conformal field theories. In this... More »

Vortices are non-singular field configurations in $2+1$ dimensions that have finite energy. They have usually been studied in a fixed Minkowski spacetime i.e. without gravity. In this work, we embed vortices in gravity. We find numerically static vortex solutions where the scalar and gauge fields have a non-singular profile under Einstein gravity in an AdS$_3$ background.... More »

The Fermilab Muon g−2 collaboration has recently released its first measurement of (g−2)μ. This result is consistent with previous Brookhaven measurements and together they yield a statistically significant 4.2σ discrepancy with the Standard Model prediction. BSM solutions to (g−2)μ feature light weakly coupled neutral particles (Singlet Scenarios) or heavy strongly coupled charged particles (Electroweak Scenarios). In recent investigations,... More »

Hydrodynamics successfully describes low-energy modes of a wide class of theories including QCD in the strongly-coupled regime. Some of the low energy constants in the hydrodynamic description of QCD, such as shear viscosity, are difficult to obtain from first principles on a classical computer due to the sign problem. One long-standing way to address sign... More »