Extensive benchmark studies are carried out in order to disentangle the origin of the differences between the three global PDF sets. It is based on the Monte Carlo combination of the CT18, MSHT20, and NNPDF3.1 sets followed by either its Hessian reduction or its replica compression. Motivated by recent progress in the PDF determinations carried out by the CT, MSHT, and NNPDF groups, we present an updated combination of global PDF fits: PDF4LHC21. These measurements supersede the previous Run II Tevatron measurements of W -boson charge asymmetry and Z -boson inclusive production.Ī precise knowledge of the quark and gluon structure of the proton, encoded by the parton distribution functions (PDFs), is of paramount importance for the interpretation of high-energy processes at present and future lepton-hadron and hadron-hadron colliders. They include the Z -boson differential cross section as a function of rapidity, measured by the D0 collaboration with 0.4 fb −1 of integrated luminosity in the Z → ee channel the Z -boson differential cross section as a function of rapidity, measured by the CDF collaboration with 2.1 fb −1 of integrated luminosity in the Z → ee channel the charge asymmetry of muons as a function of rapidity in W → μν decays, measured by the D0 collaboration with 7.3 fb −1 of integrated luminosity the W -boson charge asymmetry as a function of rapidity in the W → eν decay channel, measured by the CDF collaboration with 1 fb −1 of integrated luminosity the W -boson charge asymmetry as a function of rapidity in the W → eν decay channel, measured by the D0 collaboration with 9.7 fb −1 of integrated luminosity. The most recent measurements of W -boson charge asymmetry and Z -boson inclusive production performed in Run II of the Tevatron collider are considered in this study.
0 kommentar(er)
