Measurement of the Proton A1 and A2 Spin Asymmetries: Probing Color Forces

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 dp2 (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, Ak and A⊥ were measured using the BETA (Big Electron Telescope Array) Detector. BETA consisted of a scintillator hodoscope, gas ˇCerenkov counter, lucite hodoscope and a large lead glass electromagnetic calorimeter. With a unique open geometry, a threshold gas ˇCerenkov detector allowed BETA to cleanly identify electrons for this inclusive experiment. A measurement of dp2 is compared to lattice QCD calculations.

Grantor dc:publisher

Temple University. Libraries

Year dc:date.issued

2015

Author dc:creator

• Armstrong, Whitney Richard

Advisor dc:contributor.advisor

• Meziani, Zein-Eddine

Committee members dc:contributor.committeemember

• Metz, Andreas
• Sparveris, Nikolaos
• Surrow, Bernd
• Jones, Mark

• Physics, Nuclear
• Color force
• Higher twists
• Nuceon spin structure
• Proton structure functions
• QCD

Statement dc:rights

• IN COPYRIGHT- This Rights Statement can be used for an Item that is in copyright. Using this statement implies that the organization making this Item available has determined that the Item is in copyright and either is the rights-holder, has obtained permission from the rights-holder(s) to make their Work(s) available, or makes the Item available under an exception or limitation to copyright (including Fair Use) that entitles it to make the Item available.

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Language dc:language.iso

eng

Dc Identifier Other

920555083

OAI identifier oai:identifier

oai:scholarshare.temple.edu:20.500.12613/2560