Conveners
QCD&EW I
- John Allison
The main challenge in probing weak interactions comes from non-perturbative QCD effects. In our work we use U-spin symmetry, an approximate $SU(2)$ symmetry of the QCD Lagrangian under unitary rotation of down and strange quarks, to derive algebraic relations between decay amplitudes when exact calculations are not possible. Such relations between amplitudes are called U-spin sum rules. We...
The parameter $\epsilon_K$ is an important measure of the imbalance between matter and antimatter in the neutral kaon ($K^0$ and $\bar{K}^0$) system. In particular, $\epsilon_K$ provides a highly sensitive probe of new physics and plays a critical role in the global fit of the Cabibbo-Kobayashi-Maskawa matrix. As one of the first discovered sources of $CP$ violation, it has been extensively...
In this talk I will present results of the simulation of electroweak Higgs boson production using both NLO multi-jet merging and NLO matching frameworks provided by the general purpose event generator Herwig 7 using the matrix element providers HJets and VBFNLO for the full one-loop corrections and the approximate one-loop corrections.
Optimal Transport (OT) has been applied to jet physics in defining a notion of the distance between collider events. Here we generalize the Energy Mover’s Distance to a larger space of OT distances, including both the balanced 2-Wasserstein (W2) distance and the unbalanced Hellinger-Kantorovich (HK) distances. Whereas the W2 distance only allows for mass transportation, the HK distances allow...
Many theories beyond the Standard Model predict new phenomena, such as heavy vectors or scalar, vector-like quarks, and leptoquarks in final states containing bottom or top quarks. Such final states offer great potential to reduce the Standard Model background, although with significant challenges in reconstructing and identifying the decay products and modelling the remaining background. The...
With the discovery of the Higgs boson at the CERN Large Hadron Collider (LHC), the particle spectrum of the Standard Model (SM) is complete. The next target at the energy frontier will be to study the Higgs properties and to search for the next scale beyond the SM. Experimentally, the $H\to c \bar{c}$ channel would be extremely difficult to dig out because of both the weak Yukawa coupling and...
