2026-09-23T02:45:01Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/80619 2023-07-11 col_2142_5131 col_2142_8859 com_2142_5130 com_2142_8858 com_2142_234

Matthias Grosse-Perdekamp Rubin, Joshua George 2015-09-25T20:03:19Z 2015-09-25T20:03:19Z 10000-01-01 2009 2009 This dissertation presents an analysis of deep inelastic scattering data, with polarized electron beam and polarized hydrogen and deuterium gas targets, taken by the HERMES collaboration at the DESY laboratory in Hamburg, Germany. Double-spin Born asymmetries are presented. Semi-inclusive (hadron-identified) asymmetries are binned in the parton momentum fraction (Bjorken-x), hadron energy fraction, z, and transverse momentum. Kinematic dependences of these asymmetries are explored. A leading order purity extraction of the quark polarizations and helicity densities is performed using these three-dimensionally binned semi-inclusive asymmetries and purities matrices generated with a Lund-String fragmentation Monte-Carlo simulation. Additionally, a new rigorous procedure for tuning this phenomenological model and estimating its contribution to the systematic uncertainty of the quark polarizations is included. Other subjects explored are the influence of the target remnant on often trusted fragmentation symmetry assumptions and an improved procedure for correcting the smearing effects of limited detector resolution and QED radiation. Made available in DSpace on 2015-09-25T20:03:19Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3392461.pdf: 2273291 bytes, checksum: 06f965bf4de2fcc79f3fbe30c3e7d8f4 (MD5) Previous issue date: 2009 Embargo set by: Seth Robbins for item 81901 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 121 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2009. http://hdl.handle.net/2142/80619 (MiAaPQ)AAI3392461 eng Physics, Nuclear Polarization, Motion, and Fragmentation: Exploring the Role of Quarks in the Nucleon Through Semi-Inclusive Longitudinal Spin Asymmetries at HERMES text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.