Degree Type

Dissertation

Date of Award

2012

Degree Name

Doctor of Philosophy

Department

Physics and Astronomy

First Advisor

Soeren Prell

Abstract

A measurement of the Drell-Yan transverse momentum (pTμμ) distribution above the Z-boson mass region (116 GeV < Mμμ) in proton-proton collisions at a center-of-mass energy of 7 TeV is presented. Results are obtained using Z/γ* → μ+μ- decays in a data sample collected with the ATLAS detector at the LHC, corresponding to an integrated luminosity of 36 pb-1. The normalized differential cross-section is measured up to pTμμ of 180 GeV. We measure the ratio of the pTμμ distribution in the high mass region to that in the Z-boson mass region and multiply it with the high-statistics pTμμ distribution in the Z-mass region. Both experimental and theoretical uncertainties cancel largely in the cross-section ratio. The results are compared with predictions of perturbative QCD and event generators and are found to agree with the prediction of resummed QCD combined with fixed-order perturbative QCD over the full pTμμ range.

DOI

https://doi.org/10.31274/etd-180810-2132

Copyright Owner

Kyoko Yamamoto

Language

en

Date Available

2012-10-31

File Format

application/pdf

File Size

118 pages

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