Thumbnail Image
Item

Measurement of Single and Double Spin Asymmetries in p(e, e' pi(+/-,0))X Semi-Inclusive Deep-Inelastic Scattering

Jawalkar, Sucheta Shrikant
Abstract
Measurements in the late 1980s at CERN revealed that quark spins account for a small fraction of the proton's spin. This so-called spin crisis spurred a number of new experiments to identify the proton's silent spin contributors, namely, the spin of the gluons, which hold the quarks together, and the orbital angular momentum of both quarks and gluons. One such experiment was eg1-dvcs at the Thomas Jefferson National Accelerator Facility in Newport News, Va., which ran in 2009 and collected approximately 19 billion electron triggers for hydrogen. I will present new measurements of the single and double-spin asymmetries ALU, AUL and ALL for pi+, pi - and pi0, measured as a function of Bjorken xB, squared momentum transfer Q2, hadron energy fraction z, and hadron transverse momentum Ph ⊥. These asymmetries, which are convolutions of transverse-momentum-dependent parton distributions and fragmentation functions, correlate with the transverse momentum, and therefore with the orbital motion, of the struck quark.
Description
Date
2012-01-01
Journal Title
Journal ISSN
Volume Title
Publisher
Collections
Theses & Dissertations
Show all metadata
Download Dataset
Files
Thumbnail Image
3501901.pdf
Adobe PDF, 4.41 MB
Rights Holder
Usage License
Embargo
Research Projects
Organizational Units
Journal Issue
Keywords
Citation
Advisor
Griffioen, Keith A
Department
Physics
DOI
https://dx.doi.org/doi:10.21220/s2-jdvs-xz32
URI
https://scholarworks.wm.edu/handle/internal/5694
Embedded videos