CERN Accelerating science

ATLAS Slides
Report number	ATL-PHYS-SLIDE-2021-607
Title	Measurements of gluon fusion and vector-boson-fusion production of the Higgs boson in $𝐻\rightarrow𝑊𝑊^{*}→𝑒\nu\mu \nu$ decays using 13 TeV $pp$ collisions with the ATLAS detector
Author(s)	Hayes, Robin (University of British Columbia (CA))
Corporate author(s)	The ATLAS collaboration
Collaboration	ATLAS Collaboration
Submitted by	[email protected] on 07 Oct 2021
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	Higgs ; WW ; STXS ; Cross-sections ; HIGGS
Abstract	Measurements of the Higgs boson’s production cross-sections are an important probe of physics beyond the Standard Model (SM). At CERN’s Large Hadron Collider (LHC), these measurements are challenging due to the high-background environment, where on average fewer than one in one billion proton-proton collisions produce Higgs bosons. This talk will present recent studies of gluon-gluon fusion (ggF) and vector boson fusion (VBF) Higgs production in the $H\rightarrow WW^{*}\rightarrow e\nu\mu\nu$ decay channel, using data from the ATLAS detector at the LHC. Novel analysis techniques, including a deep neural network optimized for the discrimination of VBF Higgs events, allow the first observation of the $H\rightarrow WW^{*}$ process in the VBF channel. Measurements of the total ggF and VBF cross-sections times $H\rightarrow WW^{*}$ branching ratios are complemented by measurements performed in kinematic bins called Simplified Template Cross-Sections. This talk will outline these recent precision measurements and highlight their role in rigorously testing the SM.