{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/25776"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/25776","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Production of three charged pions in pi minus proton interactions at 5 Bev/c","abstract":"\"The 72\"\" Bubble Chamber at the Lawrence Radiation Laboratory has been exposed to a beam of 5 Bev/c pi- mesons and 150,000 photographs have been taken. As a part of this experiment, the interactions producing four charged particles in the final states have been measured and the reaction pi-p -> ppi+pi-pi- has been studied, with the emphasis placed on the three pions system. The cross section for this reaction was found to be 1.80±0.45 mba For the final analysis 6300 events (.286 ± .071 pb/event) were selected. The mass spectra of the different particle combinations have been investigated. The reaction has been found to be characterized by the following features: (1) Strong production of well-known resonances, in particular the p (35% of the events), N1236 (30%) and various N IS. (2) A broad enhancement in the pi+pi-pi- and in the popi mass between 1.0 and 1.4 Bev, associated wllh momentum transfers to the proton characteristic of diffraction-scattering. The data below the A2 mass (1.26 Bev) are consistent with this enhancement being a state of spinparity I+ with J = 0 along the incident pion direction. It does not z appear to be entirely due to a Deck-type kinematic effect. (3) Three peaks of marginal statistical significance in the pi+pi-pi- mass, with masses (and widths) 1.06 Bev (40 Mev), 1.17 Bev (60 Mev) and 1.475 Bev (30 Mev). (4) Peripheral production of a meson of mass 1.62 Bev, width about 100 Mev, decaying into pi+pi-pi-,and known as the A3 meson. Its spin-parity is most probably 2-.\"","abstract_html":""The 72"" Bubble Chamber at the Lawrence Radiation Laboratory has been exposed to a beam of 5 Bev/c pi- mesons and 150,000 photographs have been taken. As a part of this experiment, the interactions producing four charged particles in the final states have been measured and the reaction pi-p -> ppi+pi-pi- has been studied, with the emphasis placed on the three pions system. The cross section for this reaction was found to be 1.80±0.45 mba For the final analysis 6300 events (.286 ± .071 pb/event) were selected. The mass spectra of the different particle combinations have been investigated. The reaction has been found to be characterized by the following features: (1) Strong production of well-known resonances, in particular the p (35% of the events), N1236 (30%) and various N IS. (2) A broad enhancement in the pi+pi-pi- and in the popi mass between 1.0 and 1.4 Bev, associated wllh momentum transfers to the proton characteristic of diffraction-scattering. The data below the A2 mass (1.26 Bev) are consistent with this enhancement being a state of spinparity I+ with J = 0 along the incident pion direction. It does not z appear to be entirely due to a Deck-type kinematic effect. (3) Three peaks of marginal statistical significance in the pi+pi-pi- mass, with masses (and widths) 1.06 Bev (40 Mev), 1.17 Bev (60 Mev) and 1.475 Bev (30 Mev). (4) Peripheral production of a meson of mass 1.62 Bev, width about 100 Mev, decaying into pi+pi-pi-,and known as the A3 meson. Its spin-parity is most probably 2-."","abstract_has_math":false,"creators":["Terreault, Bernard"],"institution":null,"degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Kruse, U.E."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-07-11T20:45:05Z","date_published":"2011-07-11T20:45:05Z","updated_at":"2026-07-22T22:25:26Z","subjects":["charged pions","pi proton interactions","hydrogen bubble chamber"],"languages":["en"],"rights":["1969 Bernard Terreault"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["6066114"],"render_values":[{"text":"6066114","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/25776","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Kruse, U.E."]},{"key":"dc:creator","label":"Author","values":["Terreault, Bernard"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-07-11T20:45:05Z","10000-01-01","1969"]},{"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":["charged pions","pi proton interactions","hydrogen bubble chamber"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["1969 Bernard Terreault"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["6066114","http://hdl.handle.net/2142/25776"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["\"The 72\"\" Bubble Chamber at the Lawrence Radiation Laboratory has been exposed to a beam of 5 Bev/c pi- mesons and 150,000 photographs have been taken. As a part of this experiment, the interactions producing four charged particles in the final states have been measured and the reaction pi-p -> ppi+pi-pi- has been studied, with the emphasis placed on the three pions system. The cross section for this reaction was found to be 1.80±0.45 mba For the final analysis 6300 events (.286 ± .071 pb/event) were selected. The mass spectra of the different particle combinations have been investigated. The reaction has been found to be characterized by the following features: (1) Strong production of well-known resonances, in particular the p (35% of the events), N1236 (30%) and various N IS. (2) A broad enhancement in the pi+pi-pi- and in the popi mass between 1.0 and 1.4 Bev, associated wllh momentum transfers to the proton characteristic of diffraction-scattering. The data below the A2 mass (1.26 Bev) are consistent with this enhancement being a state of spinparity I+ with J = 0 along the incident pion direction. It does not z appear to be entirely due to a Deck-type kinematic effect. (3) Three peaks of marginal statistical significance in the pi+pi-pi- mass, with masses (and widths) 1.06 Bev (40 Mev), 1.17 Bev (60 Mev) and 1.475 Bev (30 Mev). (4) Peripheral production of a meson of mass 1.62 Bev, width about 100 Mev, decaying into pi+pi-pi-,and known as the A3 meson. Its spin-parity is most probably 2-.\"","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-07-11T20:45:05Z No. of bitstreams: 1 1969_terreault.pdf: 3472127 bytes, checksum: f673666afdb1df47035c272d273696d3 (MD5)","Made available in DSpace on 2011-07-11T20:45:05Z (GMT). No. of bitstreams: 1 1969_terreault.pdf: 3472127 bytes, checksum: f673666afdb1df47035c272d273696d3 (MD5) Previous issue date: 1969","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-07-11T20:45:05Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:32:46-05:00 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 three charged pions in pi minus proton interactions at 5 Bev/c"]}]}],"canonical_facts":{"dc:contributor":["Kruse, U.E."],"dc:creator":["Terreault, Bernard"],"dc:date":["2011-07-11T20:45:05Z","10000-01-01","1969"],"dc:description":["\"The 72\"\" Bubble Chamber at the Lawrence Radiation Laboratory has been exposed to a beam of 5 Bev/c pi- mesons and 150,000 photographs have been taken. As a part of this experiment, the interactions producing four charged particles in the final states have been measured and the reaction pi-p -> ppi+pi-pi- has been studied, with the emphasis placed on the three pions system. The cross section for this reaction was found to be 1.80±0.45 mba For the final analysis 6300 events (.286 ± .071 pb/event) were selected. The mass spectra of the different particle combinations have been investigated. The reaction has been found to be characterized by the following features: (1) Strong production of well-known resonances, in particular the p (35% of the events), N1236 (30%) and various N IS. (2) A broad enhancement in the pi+pi-pi- and in the popi mass between 1.0 and 1.4 Bev, associated wllh momentum transfers to the proton characteristic of diffraction-scattering. The data below the A2 mass (1.26 Bev) are consistent with this enhancement being a state of spinparity I+ with J = 0 along the incident pion direction. It does not z appear to be entirely due to a Deck-type kinematic effect. (3) Three peaks of marginal statistical significance in the pi+pi-pi- mass, with masses (and widths) 1.06 Bev (40 Mev), 1.17 Bev (60 Mev) and 1.475 Bev (30 Mev). (4) Peripheral production of a meson of mass 1.62 Bev, width about 100 Mev, decaying into pi+pi-pi-,and known as the A3 meson. Its spin-parity is most probably 2-.\"","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-07-11T20:45:05Z No. of bitstreams: 1 1969_terreault.pdf: 3472127 bytes, checksum: f673666afdb1df47035c272d273696d3 (MD5)","Made available in DSpace on 2011-07-11T20:45:05Z (GMT). No. of bitstreams: 1 1969_terreault.pdf: 3472127 bytes, checksum: f673666afdb1df47035c272d273696d3 (MD5) Previous issue date: 1969","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-07-11T20:45:05Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:32:46-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis","Thesis","U of I Only"],"dc:identifier":["6066114","http://hdl.handle.net/2142/25776"],"dc:language":["en"],"dc:rights":["1969 Bernard Terreault"],"dc:subject":["charged pions","pi proton interactions","hydrogen bubble chamber"],"dc:title":["Production of three charged pions in pi minus proton interactions at 5 Bev/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"}