August 27, 2017 to September 1, 2017
Other Institutes
Europe/Zurich timezone

High Precision Measurement of the differential W and Z boson cross-sections

Aug 28, 2017, 4:30 PM
30m
F3-4

F3-4

Hard QCD and EW Hard QCD and EW

Speaker

Ksenia Gasnikova (Deutsches Elektronen-Synchrotron (DE))

Description

Measurements of the Drell-Yan production of W and Z/gamma bosons at the LHC provide a benchmark of our understanding of perturbative QCD and probe the proton structure in a unique way. The ATLAS collaboration has performed new high precision measurements at center-of-mass energies of 7. The measurements are performed for W+, W- and Z/gamma bosons integrated and as a function of the boson or lepton rapidity and the Z/gamma* mass. Unprecedented precision is reached and strong constraints on Parton Distribution functions, in particular the strange density are found.

Z cross sections are also measured at a center-of-mass energies of 8TeV and 13TeV, and cross-section ratios to the top-quark pair production have been derived. This ratio measurement leads to a cancellation of several systematic effects and allows therefore for a high precision comparison to the theory predictions.

Primary author

Yoram Rozen (Technion (IL))

Presentation materials