Experiment E155 at the Stanford Linear Accelerator Center measured the spin structure functions g1 and g2 of the proton and deuteron using deep inelastic scattering of 50 GeV polarized electrons from dynamically polarized, solid 15NH3 and 6LiD targets. Three independent spectrometers, covering a large kinematic region, 0.014 < xBjorken < 0.9 and 1 < Q2 < 40 (GeV /c)2, detected 200 million events. A fully self-consistent and statistically sound approach to calculating radiative corrections was developed, providing well-defined statistical errors for the E155 data set. Also, a comprehensive fit to the global data set was created which simultaneously describes all existing data on p, d and n ( 3He) targets. The results represent a significant increase in the accuracy of the world data set and, together with the existing data, give improved results for the Bjorken sum rule and the quark spins. The gluon contribution to the nucleon spin is confirmed to be significant.
","abstract_html":"<p>Experiment E155 at the Stanford Linear Accelerator Center measured the spin structure functions <em>g</em>1 and <em>g</em>2 of the proton and deuteron using deep inelastic scattering of 50 GeV polarized electrons from dynamically polarized, solid <sup>15</sup>NH<sub>3</sub> and <sup>6</sup>LiD targets. Three independent spectrometers, covering a large kinematic region, 0.014 < <em>x<sub>Bjorken</sub></em> < 0.9 and 1 < <em>Q</em><sup>2</sup> < 40 (<em>GeV </em>/<em>c</em>)<sup>2,</sup> detected 200 million events. A fully self-consistent and statistically sound approach to calculating radiative corrections was developed, providing well-defined statistical errors for the E155 data set. Also, a comprehensive fit to the global data set was created which simultaneously describes all existing data on p, d and n ( <sup>3</sup>He) targets. The results represent a significant increase in the accuracy of the world data set and, together with the existing data, give improved results for the Bjorken sum rule and the quark spins. The gluon contribution to the nucleon spin is confirmed to be significant.</p>","abstract_has_math":false,"creators":["Wesselmann, Frank R."],"institution":null,"degree_name":"Doctor of Philosophy (PhD)","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Sebastian E. Kuhn","Gary E. Copeland","Hani E. Elsayed-Ali","Andi Klein","Rocco Schiavilla"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2000,"date_issued":"2000-04-01T08:00:00Z","date_published":"2000-04-01T08:00:00Z","updated_at":"2026-07-24T03:34:18Z","subjects":["Deuteron","Proton","Spin structure","Elementary Particles and Fields and String Theory","Nuclear"],"languages":[],"rights":["In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["9780599754744"],"render_values":[{"text":"9780599754744","href":null,"code":true}]}]},"links":{"outbound_url":"https://digitalcommons.odu.edu/physics_etds/86","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Sebastian E. Kuhn","Gary E. Copeland","Hani E. Elsayed-Ali","Andi Klein","Rocco Schiavilla"]},{"key":"dc:creator","label":"Author","values":["Wesselmann, Frank R."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.available","label":"Dc Date Available","values":["2019-02-22T08:00:00Z"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Physics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Doctor of Philosophy (PhD)"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Deuteron","Proton","Spin structure","Elementary Particles and Fields and String Theory","Nuclear"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:rights","label":"Dc Rights","values":["In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["9780599754744","https://digitalcommons.odu.edu/physics_etds/86"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Experiment E155 at the Stanford Linear Accelerator Center measured the spin structure functions g1 and g2 of the proton and deuteron using deep inelastic scattering of 50 GeV polarized electrons from dynamically polarized, solid 15NH3 and 6LiD targets. Three independent spectrometers, covering a large kinematic region, 0.014 < xBjorken < 0.9 and 1 < Q2 < 40 (GeV /c)2, detected 200 million events. A fully self-consistent and statistically sound approach to calculating radiative corrections was developed, providing well-defined statistical errors for the E155 data set. Also, a comprehensive fit to the global data set was created which simultaneously describes all existing data on p, d and n ( 3He) targets. The results represent a significant increase in the accuracy of the world data set and, together with the existing data, give improved results for the Bjorken sum rule and the quark spins. The gluon contribution to the nucleon spin is confirmed to be significant.
"]},{"key":"dc:title","label":"Title","values":["Precision Measurement of the Spin Structure of the Proton and the Deuteron"]}]}],"canonical_facts":{"dc:contributor":["Sebastian E. Kuhn","Gary E. Copeland","Hani E. Elsayed-Ali","Andi Klein","Rocco Schiavilla"],"dc:creator":["Wesselmann, Frank R."],"dc:date.available":["2019-02-22T08:00:00Z"],"dc:description.abstract":["Experiment E155 at the Stanford Linear Accelerator Center measured the spin structure functions g1 and g2 of the proton and deuteron using deep inelastic scattering of 50 GeV polarized electrons from dynamically polarized, solid 15NH3 and 6LiD targets. Three independent spectrometers, covering a large kinematic region, 0.014 < xBjorken < 0.9 and 1 < Q2 < 40 (GeV /c)2, detected 200 million events. A fully self-consistent and statistically sound approach to calculating radiative corrections was developed, providing well-defined statistical errors for the E155 data set. Also, a comprehensive fit to the global data set was created which simultaneously describes all existing data on p, d and n ( 3He) targets. The results represent a significant increase in the accuracy of the world data set and, together with the existing data, give improved results for the Bjorken sum rule and the quark spins. The gluon contribution to the nucleon spin is confirmed to be significant.
"],"dc:identifier":["9780599754744","https://digitalcommons.odu.edu/physics_etds/86"],"dc:rights":["In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
"],"dc:subject":["Deuteron","Proton","Spin structure","Elementary Particles and Fields and String Theory","Nuclear"],"dc:title":["Precision Measurement of the Spin Structure of the Proton and the Deuteron"],"thesis:degree_discipline":["Physics"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Doctor of Philosophy (PhD)"]},"updated_at":"2026-07-24T03:34:18Z"}