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2013

Open Access Dissertations

University of Massachusetts Amherst

ATLAS

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A Measurement Of The W/Z Cross Section Ratio As A Function Of Hadronic Activity With The Atlas Detector, Andrew Robert Meade May 2013

A Measurement Of The W/Z Cross Section Ratio As A Function Of Hadronic Activity With The Atlas Detector, Andrew Robert Meade

Open Access Dissertations

Hadronic collisions at the LHC at CERN probe particle interactions at the highest energy scale of any experiment to date. We present a research program measuring Rjet = &sigmaWBR(W&rarr&mu&nu) / (&sigmaZBR(Z&rarr&mu&mu)) as a function of a number of hadronic variables. The measurements are performed with the ATLAS detector at the LHC, using the 2011 data set, consisting of 4.64 fb-1 of pp collisions at a center of mass energy of 7 TeV. This measurement is a robust way to test the Standard Model and the modeling of perturbative QCD, and is sensitive to a wide …