Dissertation/Thesis Abstract

Measurement of the proton A1 and A2 spin asymmetries: Probing color forces
by Armstrong, Whitney Richard, Ph.D., Temple University, 2015, 193; 3702966
Abstract (Summary)

The Spin Asymmetries of the Nucleon Experiment (SANE) measured the proton spin structure function g2 in a range of Bjorken x, 0.3 < x < 0.8, where extraction of the twist-3 matrix element d2 p (an integral of g2 weighted by x2) is most sensitive. The data was taken from Q2 equal to 2.5 GeV 2 up to 6.5 GeV2. In this polarized electron scattering off a polarized hydrogen target experiment, two double spin asymmetries, A∥ and A were measured using the BETA (Big Electron Telescope Array) Detector. BETA consisted of a scintillator hodoscope, gas Čerenkov counter, lucite hodoscope and a large lead glass electromagnetic calorimeter. With a unique open geometry, a threshold gas Čerenkov detector allowed BETA to cleanly identify electrons for this inclusive experiment. A measurement of d2 p is compared to lattice QCD calculations.

Indexing (document details)
Advisor: Meziani, Zein-Eddine
Commitee: Jones, Mark, Metz, Andreas, Sparveris, Nikolaos, Surrow, Bernd
School: Temple University
Department: Physics
School Location: United States -- Pennsylvania
Source: DAI-B 76/09(E), Dissertation Abstracts International
Subjects: Nuclear physics
Keywords: Color force, Higher twists, Nuceon spin structure, Proton structure functions, Qcd
Publication Number: 3702966
ISBN: 9781321745054
Copyright © 2019 ProQuest LLC. All rights reserved. Terms and Conditions Privacy Policy Cookie Policy