Measurement of the Drell-Yan angular distribution in the dimuon channel using 2011 CMS data
Abstract
The angular distributions of muons produced by the Drell-Yan process are measured as a function of dimuon transverse momentum in two ranges of rapidity. Events from pp collisions at sqrt( s) = 7 TeV were collected with the CMS detector using dimuon triggers and selected from data samples corresponding to 4.9 fb-1 of integrated luminosity. The two-dimensional angular distribution dN/dΩ of the negative muon in the Collins-Soper frame is fitted to determine the coefficients in a parametric form of the angular distribution. The measured coefficients are compared to next-to-leading order calculations. We observe that qq and leading order qg production dominate the Drell-Yan process at pT (μμ) <55 GeV>/c, while higher-order qg production dominates the Drell-Yan process for 55< pT (μμ) <120 GeV/c.
Degree
Ph.D.
Advisors
Jones, Purdue University.
Subject Area
Particle physics
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