{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/22287"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/22287","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Electro-pion production from proton, deuteron, and helium-3","abstract":"The cross section for the $p(e,e\\sp\\prime\\pi\\sp+)n,\\ d(e,e\\sp\\prime\\pi\\sp+)2n$ and $\\sp3He(e,e\\sp\\prime\\pi\\sp+)\\sp3H$ reactions are calculated using a simple model with pion, nucleon and $\\Delta$-resonance degrees of freedom for the kinematical conditions used in a recent Saclay experiment. For the $d(e,e\\sp\\prime\\pi\\sp+)2n$ reaction, final state interactions between the two outgoing neutrons are found to have a large effect. The calculated quenching of the $\\pi\\sp+$ production cross section for the deuterium target is in agreement with that observed experimentally. It is predicted that due to the strong final state interactions in the singlet S state of the two neutrons, the $d(e,e\\sp\\prime\\pi\\sp+)2n$ cross section can have a large dependence on the orientation of the deuteron spin. For the $\\sp3He(e,e\\sp\\prime\\pi\\sp+)\\sp3H$ reaction, the quenching is predicted to be $\\sim$0.4 which is in agreement with the unpublished results of the Mainz experiment. The four important contributions to the quenching are identified as: (i) the finite size i.e., the form factor of the trinucleons, (ii) the spin-isospin correlations in the trinucleons, (iii) the finite range of the propagation of the struck proton, and (iv) the possible pion-nucleon final state interactions.","abstract_html":"The cross section for the <span class=\"etd-inline-math\">p(e,e\\sp\\prime&pi;\\sp+)n, d(e,e\\sp\\prime&pi;\\sp+)2n</span> and <span class=\"etd-inline-math\">\\sp3He(e,e\\sp\\prime&pi;\\sp+)\\sp3H</span> reactions are calculated using a simple model with pion, nucleon and $\\Delta$-resonance degrees of freedom for the kinematical conditions used in a recent Saclay experiment. For the <span class=\"etd-inline-math\">d(e,e\\sp\\prime&pi;\\sp+)2n</span> reaction, final state interactions between the two outgoing neutrons are found to have a large effect. The calculated quenching of the <span class=\"etd-inline-math\">&pi;\\sp+</span> production cross section for the deuterium target is in agreement with that observed experimentally. It is predicted that due to the strong final state interactions in the singlet S state of the two neutrons, the <span class=\"etd-inline-math\">d(e,e\\sp\\prime&pi;\\sp+)2n</span> cross section can have a large dependence on the orientation of the deuteron spin. For the <span class=\"etd-inline-math\">\\sp3He(e,e\\sp\\prime&pi;\\sp+)\\sp3H</span> reaction, the quenching is predicted to be $\\sim$0.4 which is in agreement with the unpublished results of the Mainz experiment. The four important contributions to the quenching are identified as: (i) the finite size i.e., the form factor of the trinucleons, (ii) the spin-isospin correlations in the trinucleons, (iii) the finite range of the propagation of the struck proton, and (iv) the possible pion-nucleon final state interactions.","abstract_has_math":true,"creators":["Loucks, Roger"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Pandharipande, V.R."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-05-07T13:35:05Z","date_published":"2011-05-07T13:35:05Z","updated_at":"2026-07-22T22:25:19Z","subjects":["Physics, Nuclear"],"languages":["eng"],"rights":["Copyright 1996 Loucks, Roger Jay"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["9780591199277","AAI9712362","(UMI)AAI9712362"],"render_values":[{"text":"9780591199277","href":null,"code":true},{"text":"AAI9712362","href":null,"code":true},{"text":"(UMI)AAI9712362","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/22287","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Pandharipande, V.R."]},{"key":"dc:creator","label":"Author","values":["Loucks, Roger"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-05-07T13:35:05Z","10000-01-01","1996"]},{"key":"dc:type","label":"Dc Type","values":["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."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Physics, Nuclear"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 1996 Loucks, Roger Jay"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["9780591199277","AAI9712362","(UMI)AAI9712362","http://hdl.handle.net/2142/22287"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The cross section for the $p(e,e\\sp\\prime\\pi\\sp+)n,\\ d(e,e\\sp\\prime\\pi\\sp+)2n$ and $\\sp3He(e,e\\sp\\prime\\pi\\sp+)\\sp3H$ reactions are calculated using a simple model with pion, nucleon and $\\Delta$-resonance degrees of freedom for the kinematical conditions used in a recent Saclay experiment. For the $d(e,e\\sp\\prime\\pi\\sp+)2n$ reaction, final state interactions between the two outgoing neutrons are found to have a large effect. The calculated quenching of the $\\pi\\sp+$ production cross section for the deuterium target is in agreement with that observed experimentally. It is predicted that due to the strong final state interactions in the singlet S state of the two neutrons, the $d(e,e\\sp\\prime\\pi\\sp+)2n$ cross section can have a large dependence on the orientation of the deuteron spin. For the $\\sp3He(e,e\\sp\\prime\\pi\\sp+)\\sp3H$ reaction, the quenching is predicted to be $\\sim$0.4 which is in agreement with the unpublished results of the Mainz experiment. The four important contributions to the quenching are identified as: (i) the finite size i.e., the form factor of the trinucleons, (ii) the spin-isospin correlations in the trinucleons, (iii) the finite range of the propagation of the struck proton, and (iv) the possible pion-nucleon final state interactions.","Made available in DSpace on 2011-05-07T13:35:05Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9712362.pdf: 2962024 bytes, checksum: 6c6ef2a132e8eaf74082523e738db8ab (MD5) Previous issue date: 1996","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:56:36Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:26:28-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"]},{"key":"dc:title","label":"Title","values":["Electro-pion production from proton, deuteron, and helium-3"]}]}],"canonical_facts":{"dc:contributor":["Pandharipande, V.R."],"dc:creator":["Loucks, Roger"],"dc:date":["2011-05-07T13:35:05Z","10000-01-01","1996"],"dc:description":["The cross section for the $p(e,e\\sp\\prime\\pi\\sp+)n,\\ d(e,e\\sp\\prime\\pi\\sp+)2n$ and $\\sp3He(e,e\\sp\\prime\\pi\\sp+)\\sp3H$ reactions are calculated using a simple model with pion, nucleon and $\\Delta$-resonance degrees of freedom for the kinematical conditions used in a recent Saclay experiment. For the $d(e,e\\sp\\prime\\pi\\sp+)2n$ reaction, final state interactions between the two outgoing neutrons are found to have a large effect. The calculated quenching of the $\\pi\\sp+$ production cross section for the deuterium target is in agreement with that observed experimentally. It is predicted that due to the strong final state interactions in the singlet S state of the two neutrons, the $d(e,e\\sp\\prime\\pi\\sp+)2n$ cross section can have a large dependence on the orientation of the deuteron spin. For the $\\sp3He(e,e\\sp\\prime\\pi\\sp+)\\sp3H$ reaction, the quenching is predicted to be $\\sim$0.4 which is in agreement with the unpublished results of the Mainz experiment. The four important contributions to the quenching are identified as: (i) the finite size i.e., the form factor of the trinucleons, (ii) the spin-isospin correlations in the trinucleons, (iii) the finite range of the propagation of the struck proton, and (iv) the possible pion-nucleon final state interactions.","Made available in DSpace on 2011-05-07T13:35:05Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9712362.pdf: 2962024 bytes, checksum: 6c6ef2a132e8eaf74082523e738db8ab (MD5) Previous issue date: 1996","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:56:36Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:26:28-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"],"dc:identifier":["9780591199277","AAI9712362","(UMI)AAI9712362","http://hdl.handle.net/2142/22287"],"dc:language":["eng"],"dc:rights":["Copyright 1996 Loucks, Roger Jay"],"dc:subject":["Physics, Nuclear"],"dc:title":["Electro-pion production from proton, deuteron, and helium-3"],"dc:type":["text"],"thesis:degree_discipline":["Physics"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:19Z"}