Conveners
Collider Higgs Physics
- Ramona Gröber (Università di padova)
Many well-motivated extensions of the Standard Model predict new, entirely bosonic sources of CP violation (CPV). In these scenarios, the simultaneous observation of carefully selected bosonic processes emerges as a simple yet powerful method to unambiguously reveal the presence of CPV. The present study, which establishes a promising framework of CPV searches for the upcoming HL-LHC era,...
The precise determination of the Higgs self-couplings is an essential task for understanding electroweak symmetry breaking and probing physics beyond the Standard Model (SM). The calculation of two-loop corrections is important to provide a critical test of the perturbative stability, especially in the case of large one-loop corrections that can occur in scenarios with extended scalar sectors....
The couplings of the Higgs boson to the massive gauge bosons, the third-generation quarks, the tau and the muon leptons have been measured and found to be in agreement with the predictions of the Standard Model. In contrast, the couplings to the first and second quark generations and to the electron are beyond experimental reach: the combination of their smallness and, for the quarks, the...
Dark-showers offer a compelling collider signature for Hidden Valley models featuring a confining dark sector. Our work extends these investigations to models with many more dark quark flavours where such theories enter the “conformal window''. Here, existing running coupling approximations in current event generators break down and so we must implement the exact two-loop RGE solution. This,...
A dark sector containing a confining non-abelian gauge group with multiple flavors of light dark quarks is expected to have dark pions being the lightest dark hadrons. The lightest dark pion, if stable, can be a dark matter candidate. The heavier dark pions can decay through the Z boson portal to the Standard Model (SM) particles if the light dark quarks mix with heavy electroweak doublets or...
