{"id":{"repo_id":"aachen","oai_identifier":"oai:publications.rwth-aachen.de:62262"},"canonical_url":"https://search.dev.ndltd.org/etd/aachen/oai:publications.rwth-aachen.de:62262","repository":{"repo_id":"aachen","name":"RWTH Aachen University","base_url":"https://publications.rwth-aachen.de/oai2d"},"display":{"title":"Korrekturen der schwachen Wechselwirkung zur hadronischen Topquark-Paarproduktion","abstract":"This thesis presents the calculation of the Standard Model weak-interaction corrections of order alpha_s^2 alpha to hadronic top-quark pair production. The one-loop weak corrections to top antitop production due to gluon fusion and uark antiquark annihilation are computed. Also the order alpha_s^2 alpha corrections to top antitop production due to quark gluon and antiquark gluon scattering in the Standard Model are calculated. In this complete weak-corrections of order alpha_s^2 alpha to g g, q qbar, g q, and g qbar induced hadronic t tbar production the top and antitop polarizations and spin-correlations are fully taken into account. For the Tevatron and the LHC the weak contributions to the cross section, to the transverse top-momentum (pT) distributions, and to the top antitop invariant mass (Mtt) distributions are analyzed. At the LHC the corrections to the distributions can be of the order of -10 percent compared with the leading-order results, for pT>1500 GeV and Mtt>3000 GeV, respectively. At the Tevatron the corrections are -4 percent for pT>600 GeV and Mtt>1000 GeV. This thesis also considers parity-even top antitop spin correlations of the form d sigma(++)+d sigma(--)-d sigma(+-)-d sigma(-+), where the first and second argument denotes the top and antitop spin projection onto a given reference axis. This spin asymmetries are computed as a function of Mtt. At the LHC the weak corrections are of order of -10 percent for Mtt>1000 GeV for all analyzed reference axes. At the Tevatron the corrections are in the range of 5 percent at threshold and -5 percent for Mtt>1000 GeV. Apart from parity-even spin asymmetries also the Standard Model predictions for parity violating effects in topquark pair production are calculated. This thesis analyzes parity-violating double and single spin asymmetries, and shows how they are related if CP invariance holds. For top and antitop quarks which decay semileptonically, a resulting charged-lepton forward-backward asymmetry APV with respect to the top (antitop) direction is computed. At the LHC APV is of the order of one percent if suitable invariant-mass cuts are applied.","abstract_html":"This thesis presents the calculation of the Standard Model weak-interaction corrections of order alpha_s^2 alpha to hadronic top-quark pair production. The one-loop weak corrections to top antitop production due to gluon fusion and uark antiquark annihilation are computed. Also the order alpha_s^2 alpha corrections to top antitop production due to quark gluon and antiquark gluon scattering in the Standard Model are calculated. In this complete weak-corrections of order alpha_s^2 alpha to g g, q qbar, g q, and g qbar induced hadronic t tbar production the top and antitop polarizations and spin-correlations are fully taken into account. For the Tevatron and the LHC the weak contributions to the cross section, to the transverse top-momentum (pT) distributions, and to the top antitop invariant mass (Mtt) distributions are analyzed. At the LHC the corrections to the distributions can be of the order of -10 percent compared with the leading-order results, for pT>1500 GeV and Mtt>3000 GeV, respectively. At the Tevatron the corrections are -4 percent for pT>600 GeV and Mtt>1000 GeV. This thesis also considers parity-even top antitop spin correlations of the form d sigma(++)+d sigma(--)-d sigma(+-)-d sigma(-+), where the first and second argument denotes the top and antitop spin projection onto a given reference axis. This spin asymmetries are computed as a function of Mtt. At the LHC the weak corrections are of order of -10 percent for Mtt>1000 GeV for all analyzed reference axes. At the Tevatron the corrections are in the range of 5 percent at threshold and -5 percent for Mtt>1000 GeV. Apart from parity-even spin asymmetries also the Standard Model predictions for parity violating effects in topquark pair production are calculated. This thesis analyzes parity-violating double and single spin asymmetries, and shows how they are related if CP invariance holds. For top and antitop quarks which decay semileptonically, a resulting charged-lepton forward-backward asymmetry APV with respect to the top (antitop) direction is computed. At the LHC APV is of the order of one percent if suitable invariant-mass cuts are applied.","abstract_has_math":false,"creators":["Fücker, Michael"],"institution":"Publikationsserver der RWTH Aachen University","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["Bernreuther, Werner"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2007,"date_issued":"2007","date_published":"2007","updated_at":"2026-07-30T19:43:19Z","subjects":["info:eu-repo/classification/ddc/530","Schwache Wechselwirkung","Elementarteilchenphysik","t-Quark","Paarerzeugung","Quantenchromodynamik","Physik","pairproduction","weak interaction","top quark","qcd"],"languages":["ger"],"rights":["info:eu-repo/semantics/openAccess"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-123840%22"],"render_values":[{"text":"https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-123840%22","href":"https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-123840%22","code":true}]}]},"links":{"outbound_url":"https://publications.rwth-aachen.de/record/62262","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Bernreuther, Werner"]},{"key":"dc:creator","label":"Author","values":["Fücker, Michael"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:coverage","label":"Dc Coverage","values":["DE"]},{"key":"dc:date","label":"Dc Date","values":["2007"]},{"key":"dc:publisher","label":"Institution","values":["Publikationsserver der RWTH Aachen University"]},{"key":"dc:relation","label":"Dc Relation","values":["info:eu-repo/semantics/altIdentifier/urn/urn:nbn:de:hbz:82-opus-19092"]},{"key":"dc:type","label":"Dc Type","values":["info:eu-repo/semantics/doctoralThesis","info:eu-repo/semantics/publishedVersion"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["info:eu-repo/classification/ddc/530","Schwache Wechselwirkung","Elementarteilchenphysik","t-Quark","Paarerzeugung","Quantenchromodynamik","Physik","pairproduction","weak interaction","top quark","qcd"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["ger"]},{"key":"dc:rights","label":"Dc Rights","values":["info:eu-repo/semantics/openAccess"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://publications.rwth-aachen.de/record/62262","https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-123840%22"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["This thesis presents the calculation of the Standard Model weak-interaction corrections of order alpha_s^2 alpha to hadronic top-quark pair production. The one-loop weak corrections to top antitop production due to gluon fusion and uark antiquark annihilation are computed. Also the order alpha_s^2 alpha corrections to top antitop production due to quark gluon and antiquark gluon scattering in the Standard Model are calculated. In this complete weak-corrections of order alpha_s^2 alpha to g g, q qbar, g q, and g qbar induced hadronic t tbar production the top and antitop polarizations and spin-correlations are fully taken into account. For the Tevatron and the LHC the weak contributions to the cross section, to the transverse top-momentum (pT) distributions, and to the top antitop invariant mass (Mtt) distributions are analyzed. At the LHC the corrections to the distributions can be of the order of -10 percent compared with the leading-order results, for pT>1500 GeV and Mtt>3000 GeV, respectively. At the Tevatron the corrections are -4 percent for pT>600 GeV and Mtt>1000 GeV. This thesis also considers parity-even top antitop spin correlations of the form d sigma(++)+d sigma(--)-d sigma(+-)-d sigma(-+), where the first and second argument denotes the top and antitop spin projection onto a given reference axis. This spin asymmetries are computed as a function of Mtt. At the LHC the weak corrections are of order of -10 percent for Mtt>1000 GeV for all analyzed reference axes. At the Tevatron the corrections are in the range of 5 percent at threshold and -5 percent for Mtt>1000 GeV. Apart from parity-even spin asymmetries also the Standard Model predictions for parity violating effects in topquark pair production are calculated. This thesis analyzes parity-violating double and single spin asymmetries, and shows how they are related if CP invariance holds. For top and antitop quarks which decay semileptonically, a resulting charged-lepton forward-backward asymmetry APV with respect to the top (antitop) direction is computed. At the LHC APV is of the order of one percent if suitable invariant-mass cuts are applied."]},{"key":"dc:source","label":"Dc Source","values":["Aachen : Publikationsserver der RWTH Aachen University IV, 171 S. : graph. Darst. (2007). = Aachen, Techn. Hochsch., Diss., 2007"]},{"key":"dc:title","label":"Title","values":["Korrekturen der schwachen Wechselwirkung zur hadronischen Topquark-Paarproduktion"]}]}],"canonical_facts":{"dc:contributor":["Bernreuther, Werner"],"dc:coverage":["DE"],"dc:creator":["Fücker, Michael"],"dc:date":["2007"],"dc:description":["This thesis presents the calculation of the Standard Model weak-interaction corrections of order alpha_s^2 alpha to hadronic top-quark pair production. The one-loop weak corrections to top antitop production due to gluon fusion and uark antiquark annihilation are computed. Also the order alpha_s^2 alpha corrections to top antitop production due to quark gluon and antiquark gluon scattering in the Standard Model are calculated. In this complete weak-corrections of order alpha_s^2 alpha to g g, q qbar, g q, and g qbar induced hadronic t tbar production the top and antitop polarizations and spin-correlations are fully taken into account. For the Tevatron and the LHC the weak contributions to the cross section, to the transverse top-momentum (pT) distributions, and to the top antitop invariant mass (Mtt) distributions are analyzed. At the LHC the corrections to the distributions can be of the order of -10 percent compared with the leading-order results, for pT>1500 GeV and Mtt>3000 GeV, respectively. At the Tevatron the corrections are -4 percent for pT>600 GeV and Mtt>1000 GeV. This thesis also considers parity-even top antitop spin correlations of the form d sigma(++)+d sigma(--)-d sigma(+-)-d sigma(-+), where the first and second argument denotes the top and antitop spin projection onto a given reference axis. This spin asymmetries are computed as a function of Mtt. At the LHC the weak corrections are of order of -10 percent for Mtt>1000 GeV for all analyzed reference axes. At the Tevatron the corrections are in the range of 5 percent at threshold and -5 percent for Mtt>1000 GeV. Apart from parity-even spin asymmetries also the Standard Model predictions for parity violating effects in topquark pair production are calculated. This thesis analyzes parity-violating double and single spin asymmetries, and shows how they are related if CP invariance holds. For top and antitop quarks which decay semileptonically, a resulting charged-lepton forward-backward asymmetry APV with respect to the top (antitop) direction is computed. At the LHC APV is of the order of one percent if suitable invariant-mass cuts are applied."],"dc:identifier":["https://publications.rwth-aachen.de/record/62262","https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-123840%22"],"dc:language":["ger"],"dc:publisher":["Publikationsserver der RWTH Aachen University"],"dc:relation":["info:eu-repo/semantics/altIdentifier/urn/urn:nbn:de:hbz:82-opus-19092"],"dc:rights":["info:eu-repo/semantics/openAccess"],"dc:source":["Aachen : Publikationsserver der RWTH Aachen University IV, 171 S. : graph. Darst. (2007). = Aachen, Techn. Hochsch., Diss., 2007"],"dc:subject":["info:eu-repo/classification/ddc/530","Schwache Wechselwirkung","Elementarteilchenphysik","t-Quark","Paarerzeugung","Quantenchromodynamik","Physik","pairproduction","weak interaction","top quark","qcd"],"dc:title":["Korrekturen der schwachen Wechselwirkung zur hadronischen Topquark-Paarproduktion"],"dc:type":["info:eu-repo/semantics/doctoralThesis","info:eu-repo/semantics/publishedVersion"]},"updated_at":"2026-07-30T19:43:19Z"}