Study of Inclusive Jet Production and Jet Shapes in proton-proton collisions at $\sqrt$s = 7 TeV using the ATLAS Detector

TL;DR

This thesis reports on measurements of inclusive jet cross sections and jet shapes in proton-proton collisions at 7 TeV using ATLAS data, testing QCD predictions and aiding new physics searches.

Contribution

It provides the first detailed measurements of jet shapes and cross sections at 7 TeV with full ATLAS data, comparing results to theoretical models.

Findings

Jet cross sections agree with QCD predictions within uncertainties.

Jet shape measurements show sensitivity to parton shower models.

Results help constrain QCD and improve background modeling for new physics.

Abstract

This Thesis presents the measurement of the inclusive jet cross section using the full 2010 data set, corresponding to 37 pb^{-1} collected by ATLAS. Jets with p_{T} > 20 GeV and |y| < 4.4 are considered in this analysis. The measurement of the jet shapes using the first 3 pb^{-1} is also presented, for jets with p_{T} > 30 GeV and |y| < 2.8. Both measurements are unfolded back to the particle level. Results are compared to theoretical predictions, showing the potential of the measurements to test QCD, and its importance in the search for new physics.