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Title:Measurement of transverse spin asymmetries in polarized proton-proton collisions, and the realization of new electromagnetic calorimeters for forward physics
Author(s):Koster, John, IV
Director of Research:Grosse Perdekamp, Matthias
Doctoral Committee Chair(s):Peng, Jen-Chieh
Doctoral Committee Member(s):Grosse Perdekamp, Matthias; Greene, Laura H.; Stack, John D.
Department / Program:Physics
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):transverse-spin physics
electromagnetic calorimeter
Abstract:Single transverse spin asymmetries in polarized proton-proton collisions, AN , are extracted at mid-rapidity and at forward-rapidity. The forward-rapidity data is acquired with a pair of electromagnetic calorimeters which were built as part of the thesis. All aspects of the calorimeters from design to data analysis are dis-cussed. The calorimeters are used to measure non-zero asymmetries at forward-rapidity. The measurements extend to higher pT than previously measured. The data for pT >3 GeV/c are consistent with a 1/pT falloff. A constant asymmetry at high pT is excluded at the two sigma level. At mid-rapidity, precision asymmetries for neutral pions and η mesons are measured. These asymmetries are consistent with zero, and are expected to place bounds on the gluon Sivers function. Lastly, an exploratory double transverse spin asymmetry, AT T , measurement is carried out using coincidences between the two forward calorimeters.
Issue Date:2011-01-14
Rights Information:Copyright 2010 John Koster IV
Date Available in IDEALS:2011-01-14
Date Deposited:December 2

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