Abstract
The study of final states with hadronic jets accompanying a W or Z boson is of high importance at hadronic colliders both to understand Standard Model processes and measure background contribution to Beyond the Standard Model searches. In view of the imminent start up of the LHC, we present the ATLAS prospects for the cross-section measurement of W / Z + jets events in proton-proton collisions at 14 TeV centre of mass energy. The statistical and systematic limitations are discussed in terms of probing perturbative QCD predictions and Monte Carlo generators.
Highlights
The Large Hadron Collider (LHC) will shortly start colliding protons at a centre of mass energy of 14 TeV and will offer unprecedented opportunities to explore unknown kinematic regions and discover new physics
Strongly depend on our understanding of the Standard Model (SM), in particular on precise predictions in Quantum Cromodynamics (QCD), the gauge theory of strong interactions which dominates much of the LHC physics
Final states containing W/Z + jets will serve as a Standard Model benchmark at the LHC
Summary
The Large Hadron Collider (LHC) will shortly start colliding protons at a centre of mass energy of 14 TeV and will offer unprecedented opportunities to explore unknown kinematic regions and discover new physics. The gauge boson mass ensures that the interaction scale is sufficiently large for applying perturbative calculations and the high production rate ensures abundant statistics for precise measurements. These studies are important in view of new physics searches since hadronic jets with the leptonic decays of W and Z bosons are background to both SM and Beyond the SM searches, like top production and supersymmetry. The primary end-results are hadron-level cross-sections, which are compared to fixed order calculations at leading (LO) and next-to-leading order (NLO) in QCD and to parton shower Monte Carlo models. A comparison between measurement and theoretical predictions is made
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