Speaker
Description
Presented are the studies of the production of the Standard Model Higgs boson in association with a $W$ or $Z$ boson, where the Higgs decays to $b\bar{b}$ and the $W/Z$ bosons decay leptonically. The $H\rightarrow b\bar{b}$ decay has a branching fraction of $\sim58\%$, so this study allows the probing of the dominant Higgs decay mode, as well as providing the best sensitivity to the $WH$ and $ZH$ production modes and allowing the study of the Higgs at high transverse momentum. These points are important for the interpretation of the Higgs measurements in Effective Field Theories (EFTs). Since $b$-hadrons are the only down-type hadrons that can be effectively tagged, this decay mode also allows the study of the Yukawa coupling of the Higgs boson to the down-type quarks.\
The full Run-2 dataset, corresponding to 139 fb$^{-1}$ of instantaneous luminosity, was collected in proton-proton collisions with the ATLAS detector at a centre of mass energy of $\sqrt{s}=13$ TeV. The cross-sections of this process were measured using the Simplified Template Cross Section (STXS) method. Here, the cross sections are measured as a function of the $W/Z$ boson transverse momentum in different fiducial volumes based on kinematic cuts. Results of both the resolved (where each $b$-jet is reconstructed as a separate jet) and the boosted (where the two $b$-jets are reconstructed as one fat jet) analyses are shown, as well as the future prospects of the combination of these two different methods.
Apply to be considered for a student ; award (Yes / No)?
yes
Level for award;(Hons, MSc, PhD, N/A)?
PhD
