{"created":"2021-03-01T06:44:08.091936+00:00","id":8682,"links":{},"metadata":{"_buckets":{"deposit":"199465ac-3eb3-4bda-8dd7-3fe4c7091ebc"},"_deposit":{"id":"8682","owners":[],"pid":{"revision_id":0,"type":"depid","value":"8682"},"status":"published"},"_oai":{"id":"oai:tsukuba.repo.nii.ac.jp:00008682","sets":["3:233:244"]},"author_link":["35631"],"item_12_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2003","bibliographicIssueDateType":"Issued"}}]},"item_12_date_granted_46":{"attribute_name":"学位授与年月日","attribute_value_mlt":[{"subitem_dategranted":"2003-03-25"}]},"item_12_degree_grantor_44":{"attribute_name":"学位授与大学","attribute_value_mlt":[{"subitem_degreegrantor":[{"subitem_degreegrantor_language":"ja","subitem_degreegrantor_name":"筑波大学"},{"subitem_degreegrantor_language":"en","subitem_degreegrantor_name":"University of Tsukuba"}],"subitem_degreegrantor_identifier":[{"subitem_degreegrantor_identifier_name":"12102","subitem_degreegrantor_identifier_scheme":"kakenhi"}]}]},"item_12_degree_name_43":{"attribute_name":"取得学位","attribute_value_mlt":[{"subitem_degreename":"博士（工学） "},{"subitem_degreename":"Doctor of Philosophy in Engineering"}]},"item_12_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"In this dissertation, we report the first observation of the charmless vector-vector decay mode B+[?]ρ+ρ0. The measurement is based on a 78fb-1 data sample collected with the Belle detector at the KBKB asymmetric e+e- colider operating at the Υ(4S) resonance. We obtain the branching fraction of B(B+[?]ρ+ρ0)=(31.7[?]7.1(stat.)[?]3.9(sys.)[?](pol.))X10-6. From an analysis of the ρ helicity-angle deistributions, we obtain a longitudinal polarization ratio, ΓL/Γ=(94.8[?]10.6(stat.)[?]2.1(sys.))%. We also measure a partial rate asymmetry Acp(B[?][?]ρ[?]ρ0)=(0.1[?]22.4(stat.)[?](sys.))%.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_12_description_45":{"attribute_name":"学位授与年度","attribute_value_mlt":[{"subitem_description":"2002","subitem_description_type":"Other"}]},"item_12_description_5":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"Includes bibliographical references","subitem_description_language":"en","subitem_description_type":"Other"}]},"item_12_dissertation_number_47":{"attribute_name":"報告番号","attribute_value_mlt":[{"subitem_dissertationnumber":"甲第3141号"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"open access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_abf2"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Zhang, 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