Speaker
Description
Measurements of Higgs boson production in association with a vector boson can provide direct access to the Higgs boson's couplings to vector bosons (given knowledge of the other branching fractions of the Higgs), providing stringent tests of the Standard Model of Particle Physics. In this talk, I will focus on associated production of Higgs bosons (VH) decaying to pairs of W bosons (H -> WW*). In the Large Hadron Collider's Run 2, VHWW was measured using 139 fb⁻¹ of proton-proton collision data collected by the ATLAS detector. The results were compatible with the Standard Model prediction, and the process was nearly observed with 4.6 sigma significance above the background-only hypothesis. Now, I will present the latest measurement, which adds 165 fb⁻¹ of Run 3 data at a centre-of-mass energy of 13.6 TeV, as well as a statistical combination with the Run 2 result. The Run 3 measurement uses 3- and 4-lepton final states, which were statistically limited in Run 2, and are expected to be in Run 3 as well. The production cross sections times the branching ratios, measured both inclusively (the first such HWW measurement in Run 3) and in the context of the Simplified Template Cross Section Framework (one of the first Run 3 STXS measurements by any LHC experiment), will be reported. This is expected to be the most precise measurement of VHWW and likely a new observation of the process.
| Keyword-1 | Higgs Boson Physics |
|---|---|
| Keyword-2 | High-Energy Collider Physics |
| Keyword-3 | ATLAS |