{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/25611"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/25611","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"High energy photoproduction of the p and p' vector mesons","abstract":"In an experiment in the broad band photon beam at Fermilab we observe diffractive production of 21T =and 41T =states from Be, AI. Cu and Pb targets. The 21T=data is dominated by the p(770) and the 41T=is dominated by the p'(1500). We measure the energy dependence of p photoproduction from Be and see no evidence for energy variation of the forward cross section in the range 30 to 160 GeV. The forward cross section is consistent with its average value dT / dt ~= 3.42=0.28 ub/GeV2 over the entire range. We obtain for the p' a mass of 1487+/-20 MeV and a width of 675+/-60 MeV. All quoted errors are statistical. A standard optical model analysis of the A dependence of the p and p' photoproduction yields the following results. [equations] Our results for the photon coupling constants are in good agreement with GVMD and with the e+e -storage ring results. The approximate equality of the p-nucleon and p'-nucleon total cross sections is inconsistent with the diagonal version of GVMD and provides strong motivation for including transitions between different vector mesons in GVMD.","abstract_html":"In an experiment in the broad band photon beam at Fermilab we observe diffractive production of 21T =and 41T =states from Be, AI. Cu and Pb targets. The 21T=data is dominated by the p(770) and the 41T=is dominated by the p'(1500). We measure the energy dependence of p photoproduction from Be and see no evidence for energy variation of the forward cross section in the range 30 to 160 GeV. The forward cross section is consistent with its average value dT / dt ~= 3.42=0.28 ub/GeV2 over the entire range. We obtain for the p' a mass of 1487+/-20 MeV and a width of 675+/-60 MeV. All quoted errors are statistical. A standard optical model analysis of the A dependence of the p and p' photoproduction yields the following results. [equations] Our results for the photon coupling constants are in good agreement with GVMD and with the e+e -storage ring results. The approximate equality of the p-nucleon and p'-nucleon total cross sections is inconsistent with the diagonal version of GVMD and provides strong motivation for including transitions between different vector mesons in GVMD.","abstract_has_math":false,"creators":["Bronstein, John Michael"],"institution":null,"degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Gormley, M."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-07-01T14:50:25Z","date_published":"2011-07-01T14:50:25Z","updated_at":"2026-07-22T22:25:24Z","subjects":["high energy photoproduction","photoproduction","phi vector mesons","broad band beam"],"languages":["en"],"rights":["1977 John Michael Bronstein"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["252671"],"render_values":[{"text":"252671","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/25611","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Gormley, M."]},{"key":"dc:creator","label":"Author","values":["Bronstein, John Michael"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-07-01T14:50:25Z","10000-01-01","1977"]},{"key":"dc:type","label":"Dc Type","values":["Dissertation / Thesis","text"]},{"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":["Ph.D."]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["high energy photoproduction","photoproduction","phi vector mesons","broad band beam"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["1977 John Michael Bronstein"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["252671","http://hdl.handle.net/2142/25611"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["In an experiment in the broad band photon beam at Fermilab we observe diffractive production of 21T =and 41T =states from Be, AI. Cu and Pb targets. The 21T=data is dominated by the p(770) and the 41T=is dominated by the p'(1500). We measure the energy dependence of p photoproduction from Be and see no evidence for energy variation of the forward cross section in the range 30 to 160 GeV. The forward cross section is consistent with its average value dT / dt ~= 3.42=0.28 ub/GeV2 over the entire range. We obtain for the p' a mass of 1487+/-20 MeV and a width of 675+/-60 MeV. All quoted errors are statistical. A standard optical model analysis of the A dependence of the p and p' photoproduction yields the following results. [equations] Our results for the photon coupling constants are in good agreement with GVMD and with the e+e -storage ring results. The approximate equality of the p-nucleon and p'-nucleon total cross sections is inconsistent with the diagonal version of GVMD and provides strong motivation for including transitions between different vector mesons in GVMD.","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-07-01T14:50:25Z No. of bitstreams: 1 1977_bronstein.pdf: 4790190 bytes, checksum: d80abf84a5e085613eec38ac9ade583f (MD5)","Made available in DSpace on 2011-07-01T14:50:25Z (GMT). No. of bitstreams: 1 1977_bronstein.pdf: 4790190 bytes, checksum: d80abf84a5e085613eec38ac9ade583f (MD5) Previous issue date: 1977","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-07-01T14:50:25Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:32:26-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis","Thesis","U of I Only"]},{"key":"dc:title","label":"Title","values":["High energy photoproduction of the p and p' vector mesons"]}]}],"canonical_facts":{"dc:contributor":["Gormley, M."],"dc:creator":["Bronstein, John Michael"],"dc:date":["2011-07-01T14:50:25Z","10000-01-01","1977"],"dc:description":["In an experiment in the broad band photon beam at Fermilab we observe diffractive production of 21T =and 41T =states from Be, AI. Cu and Pb targets. The 21T=data is dominated by the p(770) and the 41T=is dominated by the p'(1500). We measure the energy dependence of p photoproduction from Be and see no evidence for energy variation of the forward cross section in the range 30 to 160 GeV. The forward cross section is consistent with its average value dT / dt ~= 3.42=0.28 ub/GeV2 over the entire range. We obtain for the p' a mass of 1487+/-20 MeV and a width of 675+/-60 MeV. All quoted errors are statistical. A standard optical model analysis of the A dependence of the p and p' photoproduction yields the following results. [equations] Our results for the photon coupling constants are in good agreement with GVMD and with the e+e -storage ring results. The approximate equality of the p-nucleon and p'-nucleon total cross sections is inconsistent with the diagonal version of GVMD and provides strong motivation for including transitions between different vector mesons in GVMD.","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-07-01T14:50:25Z No. of bitstreams: 1 1977_bronstein.pdf: 4790190 bytes, checksum: d80abf84a5e085613eec38ac9ade583f (MD5)","Made available in DSpace on 2011-07-01T14:50:25Z (GMT). No. of bitstreams: 1 1977_bronstein.pdf: 4790190 bytes, checksum: d80abf84a5e085613eec38ac9ade583f (MD5) Previous issue date: 1977","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-07-01T14:50:25Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:32:26-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis","Thesis","U of I Only"],"dc:identifier":["252671","http://hdl.handle.net/2142/25611"],"dc:language":["en"],"dc:rights":["1977 John Michael Bronstein"],"dc:subject":["high energy photoproduction","photoproduction","phi vector mesons","broad band beam"],"dc:title":["High energy photoproduction of the p and p' vector mesons"],"dc:type":["Dissertation / Thesis","text"],"thesis:degree_discipline":["Physics"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."]},"updated_at":"2026-07-22T22:25:24Z"}