{"id":{"repo_id":"rice","oai_identifier":"oai:repository.rice.edu:1911/16585"},"canonical_url":"https://search.dev.ndltd.org/etd/rice/oai:repository.rice.edu:1911/16585","repository":{"repo_id":"rice","name":"Rice University","base_url":"https://repository.rice.edu/server/oai/request"},"display":{"title":"Measurement of the analyzing power in inclusive, high-x(F) charged pion production with a 200 GeV/c polarized proton beam","abstract":"The analyzing power, A$\\sb{\\rm N},$ in inclusive $\\pi\\sp{+}$ and $\\pi{-}$ production by a 200 GeV/c polarized proton beam was found to have a striking $x\\sb{F}$ dependence in which the magnitude of A$\\sb{\\rm N}$ increases from 0 to 0.42 for the $\\pi\\sp{+}$ data and decreases from 0 to $-0.38$ for the $\\pi\\sp{-}$ data for increasing $x\\sb{F}$ over the kinematic range $0.2 \\le x\\sb{F} \\le 0.9$ and 0.2$GeV/c \\le p\\sb{T} \\le 2.0GeV/c.$ The higher values of $x\\sb{F}$ and $p\\sb{T}$ in these kinematic ranges insure that the measured particle came from an interaction of the beam and target through a direct channel and that quark scattering through gluon exchange is the dominant interaction. The charged pions were identified and tracked with a large forward multi-particle spectrometer based upon a Helium gas threshold Cherenkov counter. A simple parton recombination model correctly predicts the signs of the spin parameters measured in this experiment. It also correctly predicts the magnitudes of the $\\pi\\sp{+}$ and $\\pi\\sp\\circ$ analyzing power at high $x\\sb{F}$ but the $\\pi\\sp{-}$ analyzing power is twice the predicted value. The $\\pi\\sp{+},$ $\\pi\\sp{-},$ and $\\pi\\sp\\circ$ analyzing powers were also measured with a polarized anti-proton beam. These data and their interpretation with the simple model suggest that the transverse spin of the proton can be correlated with its quarks in certain kinematic regions, however, the details are still not well understood.","abstract_html":"The analyzing power, A$\\sb{\\rm N},$ in inclusive <span class=\"etd-inline-math\">&pi;\\sp{+}</span> and <span class=\"etd-inline-math\">&pi;{-}</span> production by a 200 GeV/c polarized proton beam was found to have a striking $x\\sb{F}$ dependence in which the magnitude of A$\\sb{\\rm N}$ increases from 0 to 0.42 for the <span class=\"etd-inline-math\">&pi;\\sp{+}</span> data and decreases from 0 to $-0.38$ for the <span class=\"etd-inline-math\">&pi;\\sp{-}</span> data for increasing $x\\sb{F}$ over the kinematic range $0.2 \\le x\\sb{F} \\le 0.9$ and 0.2$GeV/c \\le p\\sb{T} \\le 2.0GeV/c.$ The higher values of $x\\sb{F}$ and $p\\sb{T}$ in these kinematic ranges insure that the measured particle came from an interaction of the beam and target through a direct channel and that quark scattering through gluon exchange is the dominant interaction. The charged pions were identified and tracked with a large forward multi-particle spectrometer based upon a Helium gas threshold Cherenkov counter. A simple parton recombination model correctly predicts the signs of the spin parameters measured in this experiment. It also correctly predicts the magnitudes of the <span class=\"etd-inline-math\">&pi;\\sp{+}</span> and <span class=\"etd-inline-math\">&pi;\\sp\\circ</span> analyzing power at high $x\\sb{F}$ but the <span class=\"etd-inline-math\">&pi;\\sp{-}</span> analyzing power is twice the predicted value. The <span class=\"etd-inline-math\">&pi;\\sp{+},</span> <span class=\"etd-inline-math\">&pi;\\sp{-},</span> and <span class=\"etd-inline-math\">&pi;\\sp\\circ</span> analyzing powers were also measured with a polarized anti-proton beam. These data and their interpretation with the simple model suggest that the transverse spin of the proton can be correlated with its quarks in certain kinematic regions, however, the details are still not well understood.","abstract_has_math":true,"creators":["White, Joseph LaSalle"],"institution":"Rice University","degree_name":"Doctor of Philosophy","degree_level":"Doctoral","degree_discipline":"Natural Sciences","degree_department":null,"school":null,"contributors":[],"advisors":["Roberts, Jabus B."],"committee_chairs":[],"committee_members":[],"year":1991,"date_issued":"1991","date_published":"1991","updated_at":"2026-07-24T04:10:28Z","subjects":["Particle physics","Elementary particles","High energy physics"],"languages":["eng"],"rights":["Copyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/1911/16585","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Roberts, Jabus B."]},{"key":"dc:creator","label":"Author","values":["White, Joseph LaSalle"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2009-06-04T00:41:47Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2009-06-04T00:41:47Z"]},{"key":"dc:date.issued","label":"Date","values":["1991"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Natural Sciences"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Doctoral"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Doctor of Philosophy"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Rice University"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Particle physics","Elementary particles","High energy physics"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/1911/16585"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The analyzing power, A$\\sb{\\rm N},$ in inclusive $\\pi\\sp{+}$ and $\\pi{-}$ production by a 200 GeV/c polarized proton beam was found to have a striking $x\\sb{F}$ dependence in which the magnitude of A$\\sb{\\rm N}$ increases from 0 to 0.42 for the $\\pi\\sp{+}$ data and decreases from 0 to $-0.38$ for the $\\pi\\sp{-}$ data for increasing $x\\sb{F}$ over the kinematic range $0.2 \\le x\\sb{F} \\le 0.9$ and 0.2$GeV/c \\le p\\sb{T} \\le 2.0GeV/c.$ The higher values of $x\\sb{F}$ and $p\\sb{T}$ in these kinematic ranges insure that the measured particle came from an interaction of the beam and target through a direct channel and that quark scattering through gluon exchange is the dominant interaction. The charged pions were identified and tracked with a large forward multi-particle spectrometer based upon a Helium gas threshold Cherenkov counter. A simple parton recombination model correctly predicts the signs of the spin parameters measured in this experiment. It also correctly predicts the magnitudes of the $\\pi\\sp{+}$ and $\\pi\\sp\\circ$ analyzing power at high $x\\sb{F}$ but the $\\pi\\sp{-}$ analyzing power is twice the predicted value. The $\\pi\\sp{+},$ $\\pi\\sp{-},$ and $\\pi\\sp\\circ$ analyzing powers were also measured with a polarized anti-proton beam. These data and their interpretation with the simple model suggest that the transverse spin of the proton can be correlated with its quarks in certain kinematic regions, however, the details are still not well understood."]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Measurement of the analyzing power in inclusive, high-x(F) charged pion production with a 200 GeV/c polarized proton beam"]}]}],"canonical_facts":{"dc:contributor.advisor":["Roberts, Jabus B."],"dc:creator":["White, Joseph LaSalle"],"dc:date.accessioned":["2009-06-04T00:41:47Z"],"dc:date.available":["2009-06-04T00:41:47Z"],"dc:date.issued":["1991"],"dc:description.abstract":["The analyzing power, A$\\sb{\\rm N},$ in inclusive $\\pi\\sp{+}$ and $\\pi{-}$ production by a 200 GeV/c polarized proton beam was found to have a striking $x\\sb{F}$ dependence in which the magnitude of A$\\sb{\\rm N}$ increases from 0 to 0.42 for the $\\pi\\sp{+}$ data and decreases from 0 to $-0.38$ for the $\\pi\\sp{-}$ data for increasing $x\\sb{F}$ over the kinematic range $0.2 \\le x\\sb{F} \\le 0.9$ and 0.2$GeV/c \\le p\\sb{T} \\le 2.0GeV/c.$ The higher values of $x\\sb{F}$ and $p\\sb{T}$ in these kinematic ranges insure that the measured particle came from an interaction of the beam and target through a direct channel and that quark scattering through gluon exchange is the dominant interaction. The charged pions were identified and tracked with a large forward multi-particle spectrometer based upon a Helium gas threshold Cherenkov counter. A simple parton recombination model correctly predicts the signs of the spin parameters measured in this experiment. It also correctly predicts the magnitudes of the $\\pi\\sp{+}$ and $\\pi\\sp\\circ$ analyzing power at high $x\\sb{F}$ but the $\\pi\\sp{-}$ analyzing power is twice the predicted value. The $\\pi\\sp{+},$ $\\pi\\sp{-},$ and $\\pi\\sp\\circ$ analyzing powers were also measured with a polarized anti-proton beam. These data and their interpretation with the simple model suggest that the transverse spin of the proton can be correlated with its quarks in certain kinematic regions, however, the details are still not well understood."],"dc:format.mimetype":["application/pdf"],"dc:identifier.uri":["https://hdl.handle.net/1911/16585"],"dc:language.iso":["eng"],"dc:rights":["Copyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder."],"dc:subject":["Particle physics","Elementary particles","High energy physics"],"dc:title":["Measurement of the analyzing power in inclusive, high-x(F) charged pion production with a 200 GeV/c polarized proton beam"],"dc:type":["Thesis"],"thesis:degree_discipline":["Natural Sciences"],"thesis:degree_level":["Doctoral"],"thesis:degree_name":["Doctor of Philosophy"],"thesis:institution_name":["Rice University"]},"updated_at":"2026-07-24T04:10:28Z"}