Scattering Amplitudes: Mathematical Methods and Novel Results (Giulio Gambuti, Oxford U.) @ Aula 500 e online
Dic 16@2:00 pm–3:00 pm

Seminario di Fisica Teorica

Scattering amplitudes provide a window on the mathematical structure of Quantum Field Theory and serve as a bridge between theoretical predictions and experimental data. Because of this, their computation is of interest to many different research areas. Although much progress has been made in the last few decades, it remains very hard to compute scattering amplitudes at higher orders in perturbation theory. I will describe modern mathematical methods for the analytic computation of amplitudes in a general QFT. As a direct example and application, I will present new three-loop results which, for the first time, allowed a direct extraction of the quadrupole radiation contribution to the infrared structure of QCD. I will conclude with a description of the high-energy (Regge) limit and the first computation of the three-loop gluon Regge trajectory.

Per connettersi a zoom
Topic: Theory and Pheno seminars
Meeting ID: 857 318 5271

Vector boson fusion production of new physics at current and future colliders (Timothy Martonhelyi, Università di Melbourne) @ Aula 500 e online
Feb 2@3:00 pm–4:00 pm

Seminario di Fenomenologia

We clarify the role of vector boson fusion (VBF) in the production of heavy vector triplets at the LHC and the HL-⁠LHC. We point out that the presence of VBF production leads to an unavoidable rate of Drell-⁠Yan
(DY) production and highlight the subtle interplay between the falling parton luminosities and the increasing importance of VBF production
as the heavy vector mass increases. We discuss current LHC searches and
HL-⁠LHC projections in di-⁠boson and di-⁠lepton final states and demonstrate that VBF production outperforms DY production for resonance masses above 1 TeV in certain regions of the parameter space. We define two benchmark parameter points which provide
competitive production rates in vector boson fusion.

Per connettersi a zoom:
Topic: Theory and Pheno seminars
Meeting ID: 857 318 5271