Measurement of transverse spin asymmetries in polarized proton-proton collisions, and the realization of new electromagnetic calorimeters for forward physics

Koster, John, IV

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https://hdl.handle.net/2142/18308 Copy

Description

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

Issue Date

2011-01-14T22:45:41Z

Director of Research (if dissertation) or Advisor (if thesis)

Grosse Perdekamp, Matthias

Doctoral Committee Chair(s)

Peng, Jen-Chieh

Committee Member(s)

• Grosse Perdekamp, Matthias
• Greene, Laura H.
• Stack, John D.

Department of Study

Physics

Discipline

Physics

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

Ph.D.

Degree Level

Dissertation

Keyword(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.

Graduation Semester

2010-12

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http://hdl.handle.net/2142/18308

Copyright and License Information

Copyright 2010 John Koster IV

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