{"id":{"repo_id":"heid-diss","oai_identifier":"oai:archiv.ub.uni-heidelberg.de:1941"},"canonical_url":"https://search.dev.ndltd.org/etd/heid-diss/oai:archiv.ub.uni-heidelberg.de:1941","repository":{"repo_id":"heid-diss","name":"Universität Heidelberg","base_url":"http://archiv.ub.uni-heidelberg.de/volltextserver/cgi/oai2"},"display":{"title":"Measurement of the W boson mass with the ALEPH detector","abstract":"The W boson mass has been extracted using W-pairs decaying into evqq and mvqq final states. The events were selected from the data collected with the ALEPH detector during the years 1998, 1999 and 2000, corresponding to a total integrated luminosity of about 650 pb-1. A kinematic fit imposing four-momentum conservation is then applied to improve the invariant mass resolution. The W boson mass is obtained from the invariant mass spectrum by a Monte Carlo reweighting method. Since the statistical and systematical uncertainties are at the same level, the latter are investigated in great detail. The presented W boson mass is then included in a preliminary world average which is used to extract a upper limit on the Higgs boson mass.","abstract_html":"The W boson mass has been extracted using W-pairs decaying into evqq and mvqq final states. The events were selected from the data collected with the ALEPH detector during the years 1998, 1999 and 2000, corresponding to a total integrated luminosity of about 650 pb-1. A kinematic fit imposing four-momentum conservation is then applied to improve the invariant mass resolution. The W boson mass is obtained from the invariant mass spectrum by a Monte Carlo reweighting method. Since the statistical and systematical uncertainties are at the same level, the latter are investigated in great detail. The presented W boson mass is then included in a preliminary world average which is used to extract a upper limit on the Higgs boson mass.","abstract_has_math":false,"creators":["Leibenguth, Guillaume"],"institution":"Universität Heidelberg","degree_name":null,"degree_level":"thesis.doctoral","degree_discipline":null,"degree_department":null,"school":null,"contributors":["Kluge, Eike-Erik"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2002,"date_issued":"2002-02-13","date_published":"2002-02-13","updated_at":"2026-07-24T02:29:18Z","subjects":[],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://www.ub.uni-heidelberg.de/archiv/1941","outbound_label":"Repository record","outbound_source":"source_url"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Kluge, Eike-Erik"]},{"key":"dc:creator","label":"Author","values":["Leibenguth, Guillaume"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:publisher","label":"Institution","values":["Universitätsbibliothek Heidelberg"]},{"key":"dc:type","label":"Dc Type","values":["doctoralThesis"]},{"key":"thesis:degree_level","label":"Degree Level","values":["thesis.doctoral"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Universität Heidelberg"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The W boson mass has been extracted using W-pairs decaying into evqq and mvqq final states. The events were selected from the data collected with the ALEPH detector during the years 1998, 1999 and 2000, corresponding to a total integrated luminosity of about 650 pb-1. A kinematic fit imposing four-momentum conservation is then applied to improve the invariant mass resolution. The W boson mass is obtained from the invariant mass spectrum by a Monte Carlo reweighting method. Since the statistical and systematical uncertainties are at the same level, the latter are investigated in great detail. The presented W boson mass is then included in a preliminary world average which is used to extract a upper limit on the Higgs boson mass.","Die Masse des W Bosons wurde mit Zerfaellen in die Kanaele evqq und mvqq extrahiert. Ereignisse der Datenahmeperiode 1998-2000, entsprechend einer integrierten Luminositaet von etwa 650 pb-1, wurden mit dem ALEPH Detektor aufgezeichnet. Eine kinematische Anpassung, die die Viererimpuls-Erhaltung benutzt, verbessert die Massenrekonstruktion. Die Masse des W Bosons ist mit Hilfe der Umgewichtungsmethode gemessen. Statistische und systematische Unsicherheiten sind nahezu gleich gross, deswegen sind letztere besonders detailliert untersucht. Das vorliegende Resultat geht in den Weltmittelwert der W Boson Masse ein, der in einer elektroschwachen Anpassung benutzt wird, um eine obere Grenze fuer die Masse des Higgs Bosons abzuleiten."]},{"key":"dc:format.medium","label":"Dc Format Medium","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Measurement of the W boson mass with the ALEPH detector","Bestimmung der Masse des W Bosons mit dem ALEPH detektor"]}]}],"canonical_facts":{"dc:contributor":["Kluge, Eike-Erik"],"dc:creator":["Leibenguth, Guillaume"],"dc:description.abstract":["The W boson mass has been extracted using W-pairs decaying into evqq and mvqq final states. The events were selected from the data collected with the ALEPH detector during the years 1998, 1999 and 2000, corresponding to a total integrated luminosity of about 650 pb-1. A kinematic fit imposing four-momentum conservation is then applied to improve the invariant mass resolution. The W boson mass is obtained from the invariant mass spectrum by a Monte Carlo reweighting method. Since the statistical and systematical uncertainties are at the same level, the latter are investigated in great detail. The presented W boson mass is then included in a preliminary world average which is used to extract a upper limit on the Higgs boson mass.","Die Masse des W Bosons wurde mit Zerfaellen in die Kanaele evqq und mvqq extrahiert. Ereignisse der Datenahmeperiode 1998-2000, entsprechend einer integrierten Luminositaet von etwa 650 pb-1, wurden mit dem ALEPH Detektor aufgezeichnet. Eine kinematische Anpassung, die die Viererimpuls-Erhaltung benutzt, verbessert die Massenrekonstruktion. Die Masse des W Bosons ist mit Hilfe der Umgewichtungsmethode gemessen. Statistische und systematische Unsicherheiten sind nahezu gleich gross, deswegen sind letztere besonders detailliert untersucht. Das vorliegende Resultat geht in den Weltmittelwert der W Boson Masse ein, der in einer elektroschwachen Anpassung benutzt wird, um eine obere Grenze fuer die Masse des Higgs Bosons abzuleiten."],"dc:format.medium":["application/pdf"],"dc:publisher":["Universitätsbibliothek Heidelberg"],"dc:title":["Measurement of the W boson mass with the ALEPH detector","Bestimmung der Masse des W Bosons mit dem ALEPH detektor"],"dc:type":["doctoralThesis"],"thesis:degree_level":["thesis.doctoral"],"thesis:institution_name":["Universität Heidelberg"]},"updated_at":"2026-07-24T02:29:18Z"}