Conveners
Wednesday Session A: Yukawa
- Raffaele Angelo Gerosa (Univ. of California San Diego (US))
- Andrea Rizzi (Universita & INFN Pisa (IT))
- Marco Zaro (Università degli Studi e INFN Milano (IT))
Wednesday Session A: BSM
- Andrea Rizzi (Universita & INFN Pisa (IT))
- Linda Finco (University of Nebraska Lincoln (US))
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...
The most recent direct searches for the H→cc process by the CMS Collaboration will be presented. The results are obtained using the full Run 2 LHC data collected in proton-proton collisions at a center of mass energy of 13 TeV, targeting the associated production of the Higgs boson with a Vector boson (W or Z boson) and, for the first time, the gluon fusion production mechanism. To fully...
Testing the Yukawa couplings of the Higgs boson to fermions is essential to understand the origin of their masses, and studies are made by exploring the properties of the Higgs boson decays to quark pairs. The talk presents various measurements of the Higgs boson decays to two bottom quarks and searches for Higgs boson decays to two charm quarks by the ATLAS experiment using the full Run 2...
I present the computation of the two-loop helicity amplitudes for Higgs boson production in association with a bottom quark pair. This work is of relevance to the precision studies of the bottom-quark Yukawa coupling, such as the analysis of new physics models which modify the strength of this coupling. I give an overview of the method and describe how we overcome the computational bottlenecks...
One of the main backgrounds in the multi-lepton decay channels of ttH production is ttW production. There is a slight tension between the theoretical predictions for this processes and what is needed to describe the data. In this talk the main cause for this tension will be outlined, and a solution, based on an improved version of the FxFx merging technique, will be proposed. This talk is...
Precision studies of the properties of the Higgs bosons may provide a unique window for the discovery of new physics at the LHC. New phenomena can in particular be revealed in the search for lepton-flavor-violating or exotic decays of the Higgs bosons, as well as in their possible couplings to hidden-sector states that do not interact under Standard Model gauge transformations. This talk...
Although the Higgs boson decay to four neutrinos predicted by the SM is inaccessibly small at the LHC, the Higgs boson branching fraction to invisible detector signatures can be significantly enhanced under various BSM scenarios. Searches for Higgs to invisible probe in particular Higgs portal models where the Higgs boson couples directly to dark matter, and the resulting constraints from the...
In the Standard Model, the branching ratio for Higgs boson decays to invisible final states is very small, but it can be significantly enhanced in extensions of the Standard Model. This talk presents searches for Higgs boson decays to invisible final states by the ATLAS experiment using the full Run 2 dataset of pp collisions collected at 13 TeV at the LHC, as well as their combination and...
This talk presents the results of a direct search for lepton-flavour-violating decays of the Higgs boson to e tau and mu tau final states with the ATLAS detector at the LHC. Both leptonically and hadronically decaying tau leptons are included and two different background estimation techniques are employed: A direct estimation of the background using MC, and a data-driven approach exploiting...
