{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/25732"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/25732","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"An upper limit on the decay rate of K°L-> pi+ pi- gamma","abstract":"\"In the film from a spark chamber, experiment on KL decays performed in the 280 beam line of the ZGS at the Argonne National Laboratory\"\" we undertook a search for the decay mode K°L-> pi+ pi- gamma The charged decay products were momentum analyzed in a magnet and identified in a set of range-shower chambers on the basis of their behavior there. The position of the gamma ray conversion point in these chambers was compared with the position predicted on the hypothesis of K°L-> pi+ pi- gamma. The Kpi3 provided almost the sole background as well: as the normalization of our rate measurement. In 962 events with good gamma showers we found one event fitted the 1(1(r hypothesis within our spacial resolution. However, the expected background was one event. This.,result corresponds to an upper limit on the decay rate [reaction] sec -1 at a confidence level of 9O%. The result is compared with the predictions of various theoretical models. The possible connections to other decay processes [reaction] and the feasibilities of CP invariance tests are discussed.\"","abstract_html":""In the film from a spark chamber, experiment on KL decays performed in the 280 beam line of the ZGS at the Argonne National Laboratory"" we undertook a search for the decay mode K°L-> pi+ pi- gamma The charged decay products were momentum analyzed in a magnet and identified in a set of range-shower chambers on the basis of their behavior there. The position of the gamma ray conversion point in these chambers was compared with the position predicted on the hypothesis of K°L-> pi+ pi- gamma. The Kpi3 provided almost the sole background as well: as the normalization of our rate measurement. In 962 events with good gamma showers we found one event fitted the 1(1(r hypothesis within our spacial resolution. However, the expected background was one event. This.,result corresponds to an upper limit on the decay rate [reaction] sec -1 at a confidence level of 9O%. The result is compared with the predictions of various theoretical models. The possible connections to other decay processes [reaction] and the feasibilities of CP invariance tests are discussed."","abstract_has_math":false,"creators":["Thatcher, Roy Cannon"],"institution":null,"degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Wattenberg, A."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-07-08T18:17:56Z","date_published":"2011-07-08T18:17:56Z","updated_at":"2026-07-22T22:25:26Z","subjects":["decay rate upper limit","spark chamber experiment","gamma ray conversion point"],"languages":["en"],"rights":["1968 Roy Cannon Thatcher"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["6083045"],"render_values":[{"text":"6083045","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/25732","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Wattenberg, A."]},{"key":"dc:creator","label":"Author","values":["Thatcher, Roy Cannon"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-07-08T18:17:56Z","10000-01-01","1968"]},{"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":["decay rate upper limit","spark chamber experiment","gamma ray conversion point"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["1968 Roy Cannon Thatcher"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["6083045","http://hdl.handle.net/2142/25732"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["\"In the film from a spark chamber, experiment on KL decays performed in the 280 beam line of the ZGS at the Argonne National Laboratory\"\" we undertook a search for the decay mode K°L-> pi+ pi- gamma The charged decay products were momentum analyzed in a magnet and identified in a set of range-shower chambers on the basis of their behavior there. The position of the gamma ray conversion point in these chambers was compared with the position predicted on the hypothesis of K°L-> pi+ pi- gamma. The Kpi3 provided almost the sole background as well: as the normalization of our rate measurement. In 962 events with good gamma showers we found one event fitted the 1(1(r hypothesis within our spacial resolution. However, the expected background was one event. This.,result corresponds to an upper limit on the decay rate [reaction] sec -1 at a confidence level of 9O%. The result is compared with the predictions of various theoretical models. The possible connections to other decay processes [reaction] and the feasibilities of CP invariance tests are discussed.\"","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-07-08T18:17:56Z No. of bitstreams: 1 1968_thatcher.pdf: 2104252 bytes, checksum: 148e92c40aaa05f4f9930e5f72cd5988 (MD5)","Made available in DSpace on 2011-07-08T18:17:56Z (GMT). No. of bitstreams: 1 1968_thatcher.pdf: 2104252 bytes, checksum: 148e92c40aaa05f4f9930e5f72cd5988 (MD5) Previous issue date: 1968","Restriction data tranferred 2014-07-01T11:32:52-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-07-08T18:17:56Z Item is restricted indefinitely.","Thesis","U of I Only"]},{"key":"dc:title","label":"Title","values":["An upper limit on the decay rate of K°L-> pi+ pi- gamma"]}]}],"canonical_facts":{"dc:contributor":["Wattenberg, A."],"dc:creator":["Thatcher, Roy Cannon"],"dc:date":["2011-07-08T18:17:56Z","10000-01-01","1968"],"dc:description":["\"In the film from a spark chamber, experiment on KL decays performed in the 280 beam line of the ZGS at the Argonne National Laboratory\"\" we undertook a search for the decay mode K°L-> pi+ pi- gamma The charged decay products were momentum analyzed in a magnet and identified in a set of range-shower chambers on the basis of their behavior there. The position of the gamma ray conversion point in these chambers was compared with the position predicted on the hypothesis of K°L-> pi+ pi- gamma. The Kpi3 provided almost the sole background as well: as the normalization of our rate measurement. In 962 events with good gamma showers we found one event fitted the 1(1(r hypothesis within our spacial resolution. However, the expected background was one event. This.,result corresponds to an upper limit on the decay rate [reaction] sec -1 at a confidence level of 9O%. The result is compared with the predictions of various theoretical models. The possible connections to other decay processes [reaction] and the feasibilities of CP invariance tests are discussed.\"","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-07-08T18:17:56Z No. of bitstreams: 1 1968_thatcher.pdf: 2104252 bytes, checksum: 148e92c40aaa05f4f9930e5f72cd5988 (MD5)","Made available in DSpace on 2011-07-08T18:17:56Z (GMT). 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