Degree Type

Dissertation

Date of Award

2018

Degree Name

Doctor of Philosophy

Department

Physics and Astronomy

Major

Nuclear Physics

First Advisor

John Lajoie

Abstract

The longitudinal double-spin asymmetry

(A\textsubscript{LL}) in spin-polarized \emph{p+p} collisions provides insight into the gluon contribution to the proton's spin by accessing the gluon helicity distribution $\Delta$g. Prior PHENIX $\pi$\textsuperscript{0} and STAR jet A\textsubscript{LL} measurements show a non-zero asymmetries and hence indicate a nonzero $\Delta$g in an NLO analysis. The STAR measurements of jet A\_LL in $\surd$s = 200 and 510 GeV polarized p+p collisions provide the strongest constraints on $\Delta$g at intermediate to high \textit{x}. A measurement of the jet A\textsubscript{LL} at $\surd$s = 510 GeV in PHENIX will provide an important cross-check. This thesis will detail the jet reconstruction techniques tuned for the PHENIX detector and present the

measured jet A\textsubscript{LL}.

Copyright Owner

Milap Patel

Language

en

File Format

application/pdf

File Size

110 pages

Included in

Physics Commons

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