{"created":"2021-03-01T06:20:47.913180+00:00","id":4141,"links":{},"metadata":{"_buckets":{"deposit":"dad3f906-b55f-4c41-8b2a-50845a811b84"},"_deposit":{"id":"4141","owners":[],"pid":{"revision_id":0,"type":"depid","value":"4141"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00004141"},"item_7_alternative_title_1":{"attribute_name":"\u305d\u306e\u4ed6\u306e\u30bf\u30a4\u30c8\u30eb","attribute_value_mlt":[{"subitem_alternative_title":"\u30a2\u30c8\u30e9\u30b9\u691c\u51fa\u5668\u3092\u7528\u3044\u305f\u91cd\u5fc3\u7cfb\u30a8\u30cd\u30eb\u30ae\u30fc7TeV\u3067\u306e\u967d\u5b50\u30fb\u967d\u5b50\u885d\u7a81\u306b\u304a\u3051\u308b\u30df\u30e5\u30fc\u30aa\u30f3\u3092\u4f34\u3046\u4e8b\u8c61\u3067\u306e\u30a6\u30a3\u30fc\u30af\u30dc\u30bd\u30f3\u306e\u751f\u6210\u65ad\u9762\u7a4d\u306e\u6e2c\u5b9a"}]},"item_7_biblio_info_7":{"attribute_name":"\u66f8\u8a8c\u60c5\u5831","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2011-03-24","bibliographicIssueDateType":"Issued"},"bibliographic_titles":[{}]}]},"item_7_date_granted_25":{"attribute_name":"\u5b66\u4f4d\u6388\u4e0e\u5e74\u6708\u65e5","attribute_value_mlt":[{"subitem_dategranted":"2011-03-24"}]},"item_7_degree_grantor_23":{"attribute_name":"\u5b66\u4f4d\u6388\u4e0e\u6a5f\u95a2","attribute_value_mlt":[{"subitem_degreegrantor":[{"subitem_degreegrantor_name":"University of Tokyo (\u6771\u4eac\u5927\u5b66)"}]}]},"item_7_degree_name_20":{"attribute_name":"\u5b66\u4f4d\u540d","attribute_value_mlt":[{"subitem_degreename":"\u535a\u58eb(\u7406\u5b66)"}]},"item_7_description_5":{"attribute_name":"\u6284\u9332","attribute_value_mlt":[{"subitem_description":"The Large Hadron Collider (LHC) -- a proton-proton collider with the highest center-of-mass energy which surpasses the previous energy frontier -- was built at CERN to investigate the TeV energy region where the existence of undiscovered physics such as the origin of the electroweak symmetry breaking and the Supersymmetry is expected. The LHC started operation on 30 March, 2010, then has been delivering proton-proton collision events. The ATLAS (A Toroidal LHC ApparatuS) experiment is held using one of the two general purpose detectors placed at the LHC. The detector is designed to exploit the full physics potential of the LHC. In this thesis, a measurement of the W and Z-boson production cross sections in proton-proton collisions at \u221as = 7 TeV are presented in the W \u2192 \u03bc\u03bd and Z \u2192 \u03bc\u03bc processes using the data collected with the ATLAS detector. The integrated luminosity used in the W \u2192 \u03bc\u03bd analysis is 310 nb-1 and in the Z \u2192 \u03bc\u03bc analysis is 331 nb-1. This production cross sections measurement is particularly significant in two aspects. One is to provide the first test of QCD prediction on the distribution of partons in proton-proton collisions at \u221as = 7 TeV. This will constitute a solid basis for every physics analysis performed in the ATLAS experiment. The other is to establish an event selection criterion for Z \u2192 \u03bc\u03bc process. This process plays a central role in the precise calibrations of detectors and algorithms for its ease of identification and the precise knowledge of the Z-boson mass and width. The muon detection efficiency of the ATLAS detector is estimated using experimental data. The muon trigger efficiency is estimated by counting the number of muon trigger signatures on the path of a given reconstructed muon track. The data taken by triggers based on the calorimeter information are used to avoid trigger biases. The muon reconstruction efficiency is estimated with respect to a track reconstructed in the inner tracking detector. In the estimation, about half the number of the layers in the muon spectrometer are required to be fired on the extrapolated path of a given inner detector track to reject non-muon backgrounds. The results of both efficiency estimations are confirmed by other independent estimation using muons in Z \u2192 \u03bc\u03bc process. This estimation provides the first trial of the detector performance measurement utilizing Z \u2192 \u03bc\u03bc process in the ATLAS experiment. The results of the cross sections measurement are as follows. \u03c3W \u00d7 BR (W \u2192 \u03bc\u03bd) = 9.57 \u00b1 0.31 (stat) \u00b1 1.15 (syst) nb. \u03c3W+ \u00d7 BR (W+ \u2192 \u03bc+\u03bd) = 5.69 \u00b1 0.23 (stat) \u00b1 0.69 (syst) nb. \u03c3W- \u00d7 BR (W- \u2192\u03bc-\u03bd) = 3.87 \u00b1 0.20 (stat) \u00b1 0.47 (syst) nb. \u03c3Z \u00d7 BR (Z \u2192 \u03bc\u03bc) = 0.87 \u00b1 0.08 (stat) \u00b1 0.12 (syst) nb. 1181 W-bosons and 109 Z-bosons are observed in data. The \u03c3W \u00d7 BR (W \u2192 \u03bc\u03bd) is measured with a transverse mass cut of MT > 40 GeV and \u03c3Z \u00d7 BR (Z \u2192 \u03bc\u03bc) is measured within an invariant mass window of 66 < m\u03bc\u03bc < 116 GeV. All the results are in agreements with the theoretical prediction including next-to-next-to leading order QCD corrections. This measurement is the W and Z-boson production cross sections measurement performed at the highest center-of-mass energy ever.","subitem_description_type":"Abstract"}]},"item_7_dissertation_number_26":{"attribute_name":"\u5b66\u4f4d\u6388\u4e0e\u756a\u53f7","attribute_value_mlt":[{"subitem_dissertationnumber":"\u7532\u7b2c26653\u53f7"}]},"item_7_full_name_3":{"attribute_name":"\u8457\u8005\u5225\u540d","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"9515","nameIdentifierScheme":"WEKO"}],"names":[{"name":"\u4e45\u4fdd\u7530, \u9686\u81f3"}]}]},"item_7_identifier_registration":{"attribute_name":"ID\u767b\u9332","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15083/00004132","subitem_identifier_reg_type":"JaLC"}]},"item_7_select_21":{"attribute_name":"\u5b66\u4f4d","attribute_value_mlt":[{"subitem_select_item":"doctoral"}]},"item_7_subject_13":{"attribute_name":"\u65e5\u672c\u5341\u9032\u5206\u985e\u6cd5","attribute_value_mlt":[{"subitem_subject":"420","subitem_subject_scheme":"NDC"}]},"item_7_text_22":{"attribute_name":"\u5b66\u4f4d\u5206\u91ce","attribute_value_mlt":[{"subitem_text_value":"Science (Rigaku)(\u7406\u5b66)"}]},"item_7_text_24":{"attribute_name":"\u7814\u7a76\u79d1\u30fb\u5c02\u653b","attribute_value_mlt":[{"subitem_text_value":"Department of Physics, Graduate School of Science (\u7406\u5b66\u7cfb\u7814\u7a76\u79d1\u7269\u7406\u5b66\u5c02\u653b)"}]},"item_7_text_27":{"attribute_name":"\u5b66\u4f4d\u8a18\u756a\u53f7","attribute_value_mlt":[{"subitem_text_value":"\u535a\u7406\u7b2c5598\u53f7"}]},"item_7_text_4":{"attribute_name":"\u8457\u8005\u6240\u5c5e","attribute_value_mlt":[{"subitem_text_value":"\u6771\u4eac\u5927\u5b66\u5927\u5b66\u9662\u7406\u5b66\u7cfb\u7814\u7a76\u79d1\u7269\u7406\u5b66\u5c02\u653b"}]},"item_creator":{"attribute_name":"\u8457\u8005","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Kubota, Takashi"}],"nameIdentifiers":[{"nameIdentifier":"9514","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"\u30d5\u30a1\u30a4\u30eb\u60c5\u5831","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-06-01"}],"displaytype":"detail","filename":"kubota_takashi.pdf","filesize":[{"value":"12.7 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"kubota_takashi.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/4141/files/kubota_takashi.pdf"},"version_id":"96346a31-8bce-4d99-ba59-32519458ff59"},{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-06-01"}],"displaytype":"detail","filename":"kubota_takashi_a.pdf","filesize":[{"value":"167.1 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"kubota_takashi_a.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/4141/files/kubota_takashi_a.pdf"},"version_id":"610e2566-9ed8-49d6-b11b-71a7dc268434"}]},"item_language":{"attribute_name":"\u8a00\u8a9e","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"\u8cc7\u6e90\u30bf\u30a4\u30d7","attribute_value_mlt":[{"resourcetype":"thesis","resourceuri":"http://purl.org/coar/resource_type/c_46ec"}]},"item_title":"Measurement of the Weak Boson Production Cross Section in the Events with Muons in Proton-Proton Collisions at \u221as = 7 TeV with the ATLAS Detector","item_titles":{"attribute_name":"\u30bf\u30a4\u30c8\u30eb","attribute_value_mlt":[{"subitem_title":"Measurement of the Weak Boson Production Cross Section in the Events with Muons in Proton-Proton Collisions at \u221as = 7 TeV with the ATLAS Detector"}]},"item_type_id":"7","owner":"1","path":["9/233/280","75/76/396"],"pubdate":{"attribute_name":"\u516c\u958b\u65e5","attribute_value":"2012-11-13"},"publish_date":"2012-11-13","publish_status":"0","recid":"4141","relation_version_is_last":true,"title":["Measurement of the Weak Boson Production Cross Section in the Events with Muons in Proton-Proton Collisions at \u221as = 7 TeV with the ATLAS Detector"],"weko_creator_id":"1","weko_shared_id":null},"updated":"2021-03-01T19:50:38.926114+00:00"}