2013/05/24 by M. Brandt, Matthias Brandt, Michael Klasen +3 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph #nucl-th
paper · pdf · doi:10.48550/arxiv.1305.5677
20 pages, 9 figures. Version published in Phys. Rev. D
openalex publication_date 2013/05/24 · arxiv created 2013/11/07 · arxiv updated 2013/11/08 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The parton densities of the proton are of fundamental importance not only for our description of hadronic and nuclear structure, but also for reliable predictions for new heavy particle searches at colliders. At the large partonic momentum fractions required for the production of these particles, the parton distribution functions, in particular the one of the gluon, are unfortunately still badly constrained. In this paper, we investigate the possibility to improve on their determination with new data coming from electroweak vector boson production at large transverse momenta at the LHC with center-of-mass energies of 7, 8 or 14 TeV. We demonstrate that this process is dominated by quark-gluon scattering, that theoretical predictions can be reliably made on the basis of next-to-leading order perturbation theory and its resummation, and that these data should thus be used in global fits. We also point out that the non-perturbative parameters determined from Tevatron run-1 Z-boson data at low pT describe very well the new LHC data at √(s)=7 TeV.