Jet Measurements In CMS

TL;DR

This paper reports measurements of inclusive jet and dijet production cross sections at 7 TeV using CMS data, comparing results to NLO QCD predictions and detailing jet energy corrections and uncertainties.

Contribution

It provides the first detailed determination of jet energy corrections and their uncertainties from CMS 7 TeV data, enhancing precision in jet measurements.

Findings

Measured jet and dijet cross sections up to high transverse momentum and invariant mass.

Compared experimental results with NLO QCD predictions using various PDFs.

Quantified jet energy scale uncertainties and components.

Abstract

A measurement of inclusive jet and dijet production cross sections is presented. Data from large hadron collider (LHC) proton-proton collisions at $\sqrt{s}=$ 7 TeV, corresponding to $4.67 fb^{-1}$ of integrated luminosity, have been collected with the compact muon solenoid (CMS) detector. Jets are reconstructed with the anti-$k_T$ clustering algorithm with size parameter $R=0.7$, extending to rapidity $|y|=2.5$, transverse momentum $p_{T}=$ 2 TeV, and dijet invariant mass $M_{JJ}=$ 5 TeV. The measured cross sections are corrected for detector effects and compared to perturbative QCD predictions at next-to-leading order (NLO), corrected for non perturbative (NP) factors, using various sets of parton distribution functions. Determination Of Jet Energy Correction from $\sqrt{s}=$ 7 TeV CMS data is presented. The individual components are determined. The jet energy scale uncertainty factors are also shown.