{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/25301"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/25301","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Production of K+K - and ppbar pairs in high energy photoproduction","abstract":"Using the Fermilab broad-band neutral beam and a multi-particle spectrometer, we have investigated the channels: photon + d ==> K+K- over ppbar (n, p, d, or X) ppbar In K+K-production, we make precise measurements of the elastic phi photoproduction cross section between 35 GeV and 85 GeV. Between these limits, we see the elastic cross section rise by 25%. At K+K-masses higher than the phi, we see an enhancement centered at 1.72 ± .02 GeV, with a width of .12 ± .05 GeV. We measure the cross section to be 8.0 ± 2.8 nb/nucleon, with an additional systematic error of 16%. Measurements are made of its production characteristics. The most probable interpretation of this state is a radial excitation of the phi, or phi-prime. Production of ppbar pairs is measured. The ppbar mass spectrum displays no obvious peaks, either in elastic or inelastic photoproduction. Limits are set for previously reported possible states in ppbar electroproduction, which are significantly below the reported cross sections.","abstract_html":"Using the Fermilab broad-band neutral beam and a multi-particle spectrometer, we have investigated the channels: photon + d ==> K+K- over ppbar (n, p, d, or X) ppbar In K+K-production, we make precise measurements of the elastic phi photoproduction cross section between 35 GeV and 85 GeV. Between these limits, we see the elastic cross section rise by 25%. At K+K-masses higher than the phi, we see an enhancement centered at 1.72 ± .02 GeV, with a width of .12 ± .05 GeV. We measure the cross section to be 8.0 ± 2.8 nb/nucleon, with an additional systematic error of 16%. Measurements are made of its production characteristics. The most probable interpretation of this state is a radial excitation of the phi, or phi-prime. Production of ppbar pairs is measured. The ppbar mass spectrum displays no obvious peaks, either in elastic or inelastic photoproduction. Limits are set for previously reported possible states in ppbar electroproduction, which are significantly below the reported cross sections.","abstract_has_math":false,"creators":["Olszewski, Christopher John"],"institution":null,"degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Gladding, G.E."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-06-06T17:35:02Z","date_published":"2011-06-06T17:35:02Z","updated_at":"2026-07-22T22:25:24Z","subjects":["production of K+K-","ppbar pairs","high energy photoproduction","broad-band neutral beam"],"languages":["en"],"rights":["1985 Christopher John Olszewski"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["901295"],"render_values":[{"text":"901295","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/25301","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Gladding, G.E."]},{"key":"dc:creator","label":"Author","values":["Olszewski, Christopher John"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-06-06T17:35:02Z","10000-01-01","1985"]},{"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":["production of K+K-","ppbar pairs","high energy photoproduction","broad-band neutral beam"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["1985 Christopher John Olszewski"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["901295","http://hdl.handle.net/2142/25301"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Using the Fermilab broad-band neutral beam and a multi-particle spectrometer, we have investigated the channels: photon + d ==> K+K- over ppbar (n, p, d, or X) ppbar In K+K-production, we make precise measurements of the elastic phi photoproduction cross section between 35 GeV and 85 GeV. Between these limits, we see the elastic cross section rise by 25%. At K+K-masses higher than the phi, we see an enhancement centered at 1.72 ± .02 GeV, with a width of .12 ± .05 GeV. We measure the cross section to be 8.0 ± 2.8 nb/nucleon, with an additional systematic error of 16%. Measurements are made of its production characteristics. The most probable interpretation of this state is a radial excitation of the phi, or phi-prime. Production of ppbar pairs is measured. The ppbar mass spectrum displays no obvious peaks, either in elastic or inelastic photoproduction. Limits are set for previously reported possible states in ppbar electroproduction, which are significantly below the reported cross sections.","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-06T17:35:02Z No. of bitstreams: 1 1985_olszewski.pdf: 5384355 bytes, checksum: 49ffabb28be52d98d794bdc9a27046df (MD5)","Made available in DSpace on 2011-06-06T17:35:02Z (GMT). No. of bitstreams: 1 1985_olszewski.pdf: 5384355 bytes, checksum: 49ffabb28be52d98d794bdc9a27046df (MD5) Previous issue date: 1985","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-06-06T17:35:02Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:16:12-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis","Thesis","U of I Only"]},{"key":"dc:title","label":"Title","values":["Production of K+K - and ppbar pairs in high energy photoproduction"]}]}],"canonical_facts":{"dc:contributor":["Gladding, G.E."],"dc:creator":["Olszewski, Christopher John"],"dc:date":["2011-06-06T17:35:02Z","10000-01-01","1985"],"dc:description":["Using the Fermilab broad-band neutral beam and a multi-particle spectrometer, we have investigated the channels: photon + d ==> K+K- over ppbar (n, p, d, or X) ppbar In K+K-production, we make precise measurements of the elastic phi photoproduction cross section between 35 GeV and 85 GeV. Between these limits, we see the elastic cross section rise by 25%. At K+K-masses higher than the phi, we see an enhancement centered at 1.72 ± .02 GeV, with a width of .12 ± .05 GeV. We measure the cross section to be 8.0 ± 2.8 nb/nucleon, with an additional systematic error of 16%. Measurements are made of its production characteristics. The most probable interpretation of this state is a radial excitation of the phi, or phi-prime. Production of ppbar pairs is measured. The ppbar mass spectrum displays no obvious peaks, either in elastic or inelastic photoproduction. Limits are set for previously reported possible states in ppbar electroproduction, which are significantly below the reported cross sections.","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-06T17:35:02Z No. of bitstreams: 1 1985_olszewski.pdf: 5384355 bytes, checksum: 49ffabb28be52d98d794bdc9a27046df (MD5)","Made available in DSpace on 2011-06-06T17:35:02Z (GMT). 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