We present a study of the production of energetic isolated photons in the reaction e[superscript]+e[superscript]-→ Z[superscript]0→ q[macron]q[gamma] using the DELPHI detector at LEP. Within the context of the Standard Model, our results for final state radiation show no evidence for anomolous photon production due to rare or new processes. We present a comparison of our data with these theoretical expectations and present upper limits at the 95% CL on the cross section times the branching ratio to hadrons and a photon for the rare or new processes: (1) [sigma](e[superscript]+e[superscript]-→ Z[superscript]0→ H[superscript]0[gamma])· BR(H[superscript]0→ q[macron]q), (2) [sigma](e[superscript]+e[superscript]-→ Z[superscript]0→ qq[superscript]*)· BR(q[superscript]*→ q[gamma]), (3) [sigma](e[superscript]+e[superscript]-→ Z[superscript]0→ Z[superscript]*[gamma])· BR(Z[superscript]*→ q[macron]q).
","abstract_html":"<p>We present a study of the production of energetic isolated photons in the reaction e[superscript]+e[superscript]-→ Z[superscript]0→ q[macron]q[gamma] using the DELPHI detector at LEP. Within the context of the Standard Model, our results for final state radiation show no evidence for anomolous photon production due to rare or new processes. We present a comparison of our data with these theoretical expectations and present upper limits at the 95% CL on the cross section times the branching ratio to hadrons and a photon for the rare or new processes: (1) [sigma](e[superscript]+e[superscript]-→ Z[superscript]0→ H[superscript]0[gamma])· BR(H[superscript]0→ q[macron]q), (2) [sigma](e[superscript]+e[superscript]-→ Z[superscript]0→ qq[superscript]*)· BR(q[superscript]*→ q[gamma]), (3) [sigma](e[superscript]+e[superscript]-→ Z[superscript]0→ Z[superscript]*[gamma])· BR(Z[superscript]*→ q[macron]q).</p>","abstract_has_math":false,"creators":["Holmes, Randall"],"institution":null,"degree_name":"Doctor of Philosophy","degree_level":"dissertation","degree_discipline":null,"degree_department":"Department of Physics and Astronomy","school":null,"contributors":[],"advisors":["E. I. Rosenberg"],"committee_chairs":[],"committee_members":[],"year":1992,"date_issued":"1992","date_published":"1992","updated_at":"2026-07-24T02:39:07Z","subjects":[],"languages":["en"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier.doi","label":"DOI","values":["https://doi.org/10.31274/rtd-180813-11964"],"render_values":[{"text":"https://doi.org/10.31274/rtd-180813-11964","href":"https://doi.org/10.31274/rtd-180813-11964","code":true}]},{"key":"dc:identifier","label":"Identifier","values":["archive/lib.dr.iastate.edu/rtd/9800/"],"render_values":[{"text":"archive/lib.dr.iastate.edu/rtd/9800/","href":null,"code":true}]}]},"links":{"outbound_url":"https://dr.lib.iastate.edu/handle/20.500.12876/82939","outbound_label":"Repository record","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["E. I. Rosenberg"]},{"key":"dc:contributor.department","label":"Department","values":["Department of Physics and Astronomy"]},{"key":"dc:creator","label":"Author","values":["Holmes, Randall"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2018-08-16T04:23:15.000"]},{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2020-07-02T06:15:44Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2020-07-02T06:15:44Z"]},{"key":"dc:date.issued","label":"Date","values":["1992"]},{"key":"dc:type","label":"Dc Type","values":["dissertation"]},{"key":"thesis:degree_level","label":"Degree Level","values":["dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Doctor of Philosophy"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["archive/lib.dr.iastate.edu/rtd/9800/"]},{"key":"dc:identifier.doi","label":"DOI","values":["https://doi.org/10.31274/rtd-180813-11964"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://dr.lib.iastate.edu/handle/20.500.12876/82939"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["We present a study of the production of energetic isolated photons in the reaction e[superscript]+e[superscript]-→ Z[superscript]0→ q[macron]q[gamma] using the DELPHI detector at LEP. Within the context of the Standard Model, our results for final state radiation show no evidence for anomolous photon production due to rare or new processes. We present a comparison of our data with these theoretical expectations and present upper limits at the 95% CL on the cross section times the branching ratio to hadrons and a photon for the rare or new processes: (1) [sigma](e[superscript]+e[superscript]-→ Z[superscript]0→ H[superscript]0[gamma])· BR(H[superscript]0→ q[macron]q), (2) [sigma](e[superscript]+e[superscript]-→ Z[superscript]0→ qq[superscript]*)· BR(q[superscript]*→ q[gamma]), (3) [sigma](e[superscript]+e[superscript]-→ Z[superscript]0→ Z[superscript]*[gamma])· BR(Z[superscript]*→ q[macron]q).
"]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["A study of isolated photons in Z0 hadronic decays using the DELPHI detector at LEP"]}]}],"canonical_facts":{"dc:contributor.advisor":["E. I. Rosenberg"],"dc:contributor.department":["Department of Physics and Astronomy"],"dc:creator":["Holmes, Randall"],"dc:date":["2018-08-16T04:23:15.000"],"dc:date.accessioned":["2020-07-02T06:15:44Z"],"dc:date.available":["2020-07-02T06:15:44Z"],"dc:date.issued":["1992"],"dc:description.abstract":["We present a study of the production of energetic isolated photons in the reaction e[superscript]+e[superscript]-→ Z[superscript]0→ q[macron]q[gamma] using the DELPHI detector at LEP. Within the context of the Standard Model, our results for final state radiation show no evidence for anomolous photon production due to rare or new processes. We present a comparison of our data with these theoretical expectations and present upper limits at the 95% CL on the cross section times the branching ratio to hadrons and a photon for the rare or new processes: (1) [sigma](e[superscript]+e[superscript]-→ Z[superscript]0→ H[superscript]0[gamma])· BR(H[superscript]0→ q[macron]q), (2) [sigma](e[superscript]+e[superscript]-→ Z[superscript]0→ qq[superscript]*)· BR(q[superscript]*→ q[gamma]), (3) [sigma](e[superscript]+e[superscript]-→ Z[superscript]0→ Z[superscript]*[gamma])· BR(Z[superscript]*→ q[macron]q).
"],"dc:format.mimetype":["application/pdf"],"dc:identifier":["archive/lib.dr.iastate.edu/rtd/9800/"],"dc:identifier.doi":["https://doi.org/10.31274/rtd-180813-11964"],"dc:identifier.uri":["https://dr.lib.iastate.edu/handle/20.500.12876/82939"],"dc:language.iso":["en"],"dc:title":["A study of isolated photons in Z0 hadronic decays using the DELPHI detector at LEP"],"dc:type":["dissertation"],"thesis:degree_level":["dissertation"],"thesis:degree_name":["Doctor of Philosophy"]},"updated_at":"2026-07-24T02:39:07Z"}