Conveners
QCD&EW II
- Dorival Gonçalves (Oklahoma State University)
The recent W boson mass measurement by CDF disagrees with the Standard Model prediction, which can be obtained in several ways. I will discuss the W boson mass result obtained using the MSbar scheme, including a recent calculation of the 3-loop QCD correction.
In this short talk we revisit the treatment of weak gauge bosons as constituents of high-energy leptons. In particular, using a new, public implementation of (polarized) W/Z parton distribution functions in the Monte Carlo event generator MadGraph5_aMC@NLO, we report the size of universal, i.e., process independent, corrections that spoil the accuracy of a scattering/factorization formula for...
Measurements of W/Z-boson production in association with jets are an important test of perturbative QCD prediction and also yield information about the parton distribution functions of the proton. This talk will present recent Z+jets results focusing on extreme phase-spaces with high pT jets as well as high pT heavy-flavour jets. The data are presented differentially and compared to...
The large top quark samples in top quark pair and single top production have yielded measurements of the production cross section of unprecedented precision and in new kinematic regimes. They have also enabled new measurements of top quark properties that were previously inaccessible. In this contribution the highlights of the ATLAS top quark precision program are presented. ATLAS presents in...
In this talk, I will review the most recent global analysis of electroweak data in the Standard Model as obtained in the HEPfit framework (arXiv:2112.07274). Moreover, I will discuss the impact of the recent measurements of the top-quark mass (CMS collaboration) and of the W-boson mass (CDF collaboration) on the fit of electroweak data in the Standard Model and beyond with a particular...
We show that the mass and width of an unstable particle are precisely defined by the pole in the complex energy plane, $\mu = m - (i/2)\Gamma$, by using the the defining relationship between the width and the lifetime, $\Gamma = 1/\tau$. We find that the physical $Z$ boson mass lies 26 MeV below its quoted value, while the physical $W$ boson mass lies 20 MeV below.
