We determine the value of the strong coupling α_s and study its running over a wide range of scales as probed by the dijet production process at hadron colliders. The analysis is performed using the complete next-to-next-to-leading order (NNLO) predictions in perturbative QCD and is based on dijet data published by ATLAS and CMS at center-of-mass energies of 7, 8, and 13 TeV. From a large...
Overview of PDFs for EW precision across all groups, including approximate N3LO and theoretical uncertainties amongst other important aspects
We consider two-loop QCD corrections in the leading color approximation for the production of a heavy electroweak vector boson, $V = \{W^{\pm}, Z,\gamma^\star\}$, in association with two light jets ($Vjj$) at hadron colliders. Leptonic decays of the electroweak boson are included at the amplitude level. We develop an approach that allows us to derive an analytic representation three orders of...
Non-perturbative effects present an important contribution to precise measurements of SM parameters. They are typically studied using Monte Carlo event generators that complement fixed-order predictions with non-perturbative models. These models are of empirical nature and need to be tuned to experimental measurements in order to provide accurate predictions. Once tuned, they are typically...
Understanding the Higgs boson self-coupling is fundamental to uncovering the structure of the Higgs potential and testing the Standard Model (SM) at a deeper level. Among the various processes that probe this coupling, Higgs boson pair production via gluon fusion—a loop-induced mechanism—is among the primary ones. In particular, the electroweak (EW) sector plays a pivotal role in reducing...
