High Precision for Hard Processes (HP2 2024)

Sessione

Plenary

10 set 2024, 09:00

33. Catani's collinear factorisation to all perturbative orders in QCD

We consider the most general factorisation properties of scattering amplitudes in perturbative QCD in both collinear and collinear-soft limits. While scattering amplitudes obey strict collinear factorisation (SCF) in the time-like collinear region to all perturbative orders, SCF is known to break in the so-called space-like region. We generalise previously known results of SCF breaking to more...

32. Precision predictions in the gauge and scalar sectors of the super weak extension of the standard model

The superweak (SW) force is a minimal, anomaly-free U(1) extension of the standard model (SM) with a complex scalar and three sterile right-handed neutrions. The SWSM is designed to explain the origin of (i) neutrino masses and mixing matrix elements, (ii) dark matter, (iii) cosmic inflation, (iv) stabilization of the electroweak vacuum and (v) leptogenesis. In this talk we present precision...

34. The solution is in the vacuum

The artificial separation between loop and tree-level contributions is at the origin of many technical difficulties in quantum field theory at high perturbative orders. The original motivation for the loop-tree duality (LTD), as explained in the seminal paper by Stefano Catani, was to circumvent this separation by opening the loops to tree-level objects in such a way that both contributions...