Measurement of the Transverse Spin Polarization of the Lambda in Quasi-Real Photoproduction and Electroproduction at HERMES

The mystery of hadron polarization has been a source of both experimental and theoretical interest the last few decades. Measurements of polarizations in such particles as the Lambda particle have been done in proton-proton collisions, but studies in positron-proton scattering with high statistical accuracy have been lacking. At the HERMES experiment, the polarization of the Lambda and Lambda have been measured in the inclusive, quasi-real photoproduction regime. A positive polarization with respect to the Lambda production plane has been observed for the Lambda. Also, semi-inclusive deep inelastic scattering (SIDIS) measurements for the Lambda have been obtained. The results indicate a small, positive polarization, but more statistics are required to make a more positive statement.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Physics

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Andrus, Aaron Elvis

Contributors dc:contributor

• Makins, N.C.R.

• Physics, Nuclear

Language dc:language

eng

Identifier

(MiAaPQ)AAI3242781

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/80534