{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/25699"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/25699","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Strange particle production in pi-p and pi+n interactions at 2.5 GeV/c","abstract":"A bubble chamber experiment based upon 2.71 x 10^5 m pi- track length in hydrogen and 6.88 x 105 m~+ track length in deuterium has been performed to study strange particle production. Cross sections for pi-p reactions exhibit no marked departure from trends established by other experiments at nearby energies. In extracting information about pi+n interactions from the pi+D exposure it was found that 15 to 30% of events, depending on the final state particles, had protons with momentum greater than 250 MeV/c. These protons were not isotropic in the laboratory and therefore not spectators in the sense of the impulse approximation. Protons whose momentum lay in the interval 0 to 250 MeV/c were generally isotropic, and their momentum distribution agreed moderately well with a Hulthen distribution normalized over this interval. With the inclusion of the high proton momentum events the cross sections for processes apparently arising from pi+n interactions were found to be in satisfactory agreement with cross sections for the charge symmetric pi-p reactions.","abstract_html":"A bubble chamber experiment based upon 2.71 x 10^5 m pi- track length in hydrogen and 6.88 x 105 m~+ track length in deuterium has been performed to study strange particle production. Cross sections for pi-p reactions exhibit no marked departure from trends established by other experiments at nearby energies. In extracting information about pi+n interactions from the pi+D exposure it was found that 15 to 30% of events, depending on the final state particles, had protons with momentum greater than 250 MeV/c. These protons were not isotropic in the laboratory and therefore not spectators in the sense of the impulse approximation. Protons whose momentum lay in the interval 0 to 250 MeV/c were generally isotropic, and their momentum distribution agreed moderately well with a Hulthen distribution normalized over this interval. With the inclusion of the high proton momentum events the cross sections for processes apparently arising from pi+n interactions were found to be in satisfactory agreement with cross sections for the charge symmetric pi-p reactions.","abstract_has_math":false,"creators":["Hanft, Raymond William"],"institution":null,"degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Sard, R.D."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-07-07T17:29:26Z","date_published":"2011-07-07T17:29:26Z","updated_at":"2026-07-22T22:25:26Z","subjects":["strange particle production","bubble chamber experiment"],"languages":["en"],"rights":["1967 Raymond William Hanft"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["6086911"],"render_values":[{"text":"6086911","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/25699","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Sard, R.D."]},{"key":"dc:creator","label":"Author","values":["Hanft, Raymond William"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-07-07T17:29:26Z","10000-01-01","1967"]},{"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":["strange particle production","bubble chamber experiment"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["1967 Raymond William Hanft"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["6086911","http://hdl.handle.net/2142/25699"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["A bubble chamber experiment based upon 2.71 x 10^5 m pi- track length in hydrogen and 6.88 x 105 m~+ track length in deuterium has been performed to study strange particle production. Cross sections for pi-p reactions exhibit no marked departure from trends established by other experiments at nearby energies. In extracting information about pi+n interactions from the pi+D exposure it was found that 15 to 30% of events, depending on the final state particles, had protons with momentum greater than 250 MeV/c. These protons were not isotropic in the laboratory and therefore not spectators in the sense of the impulse approximation. Protons whose momentum lay in the interval 0 to 250 MeV/c were generally isotropic, and their momentum distribution agreed moderately well with a Hulthen distribution normalized over this interval. With the inclusion of the high proton momentum events the cross sections for processes apparently arising from pi+n interactions were found to be in satisfactory agreement with cross sections for the charge symmetric pi-p reactions.","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-07-07T17:29:26Z No. of bitstreams: 1 1967_hanft.pdf: 4839750 bytes, checksum: 012145e927456a54d29681a24b11aeaa (MD5)","Made available in DSpace on 2011-07-07T17:29:26Z (GMT). No. of bitstreams: 1 1967_hanft.pdf: 4839750 bytes, checksum: 012145e927456a54d29681a24b11aeaa (MD5) Previous issue date: 1967","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-07-07T17:29:26Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:32:47-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis","Thesis","U of I Only"]},{"key":"dc:title","label":"Title","values":["Strange particle production in pi-p and pi+n interactions at 2.5 GeV/c"]}]}],"canonical_facts":{"dc:contributor":["Sard, R.D."],"dc:creator":["Hanft, Raymond William"],"dc:date":["2011-07-07T17:29:26Z","10000-01-01","1967"],"dc:description":["A bubble chamber experiment based upon 2.71 x 10^5 m pi- track length in hydrogen and 6.88 x 105 m~+ track length in deuterium has been performed to study strange particle production. Cross sections for pi-p reactions exhibit no marked departure from trends established by other experiments at nearby energies. In extracting information about pi+n interactions from the pi+D exposure it was found that 15 to 30% of events, depending on the final state particles, had protons with momentum greater than 250 MeV/c. These protons were not isotropic in the laboratory and therefore not spectators in the sense of the impulse approximation. Protons whose momentum lay in the interval 0 to 250 MeV/c were generally isotropic, and their momentum distribution agreed moderately well with a Hulthen distribution normalized over this interval. With the inclusion of the high proton momentum events the cross sections for processes apparently arising from pi+n interactions were found to be in satisfactory agreement with cross sections for the charge symmetric pi-p reactions.","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-07-07T17:29:26Z No. of bitstreams: 1 1967_hanft.pdf: 4839750 bytes, checksum: 012145e927456a54d29681a24b11aeaa (MD5)","Made available in DSpace on 2011-07-07T17:29:26Z (GMT). No. of bitstreams: 1 1967_hanft.pdf: 4839750 bytes, checksum: 012145e927456a54d29681a24b11aeaa (MD5) Previous issue date: 1967","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-07-07T17:29:26Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:32:47-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis","Thesis","U of I Only"],"dc:identifier":["6086911","http://hdl.handle.net/2142/25699"],"dc:language":["en"],"dc:rights":["1967 Raymond William Hanft"],"dc:subject":["strange particle production","bubble chamber experiment"],"dc:title":["Strange particle production in pi-p and pi+n interactions at 2.5 GeV/c"],"dc:type":["Dissertation / Thesis","text"],"thesis:degree_discipline":["Physics"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."]},"updated_at":"2026-07-22T22:25:26Z"}