{"_buckets": {"deposit": "6ac940aa-1125-4d55-969c-8b13226c6f46"}, "_deposit": {"id": "4704", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "4704"}, "status": "published"}, "_oai": {"id": "oai:niigata-u.repo.nii.ac.jp:00004704"}, "item_6_alternative_title_1": {"attribute_name": "\u305d\u306e\u4ed6\u306e\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_alternative_title": "B0 \uffeb Ks \u03c00\u5d29\u58ca\u3092\u7528\u3044\u305fCP\u975e\u4fdd\u5b58\u306e\u7814\u7a76"}]}, "item_6_biblio_info_6": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2005-09-20", "bibliographicIssueDateType": "Issued"}, "bibliographicPageEnd": "134", "bibliographicPageStart": "1", "bibliographic_titles": [{}]}]}, "item_6_date_granted_51": {"attribute_name": "\u5b66\u4f4d\u6388\u4e0e\u5e74\u6708\u65e5", "attribute_value_mlt": [{"subitem_dategranted": "2005-09-20"}]}, "item_6_degree_grantor_49": {"attribute_name": "\u5b66\u4f4d\u6388\u4e0e\u6a5f\u95a2", "attribute_value_mlt": [{"subitem_degreegrantor": [{"subitem_degreegrantor_name": "\u65b0\u6f5f\u5927\u5b66"}]}]}, "item_6_degree_name_48": {"attribute_name": "\u5b66\u4f4d\u540d", "attribute_value_mlt": [{"subitem_degreename": "\u535a\u58eb\uff08\u7406\u5b66\uff09"}]}, "item_6_description_4": {"attribute_name": "\u6284\u9332", "attribute_value_mlt": [{"subitem_description": "B0 \u2192 Ks\u03c00 is b \u2192 s transition of penguin decay process, that is called flavor changing neutral current. The tree-level contribution is much smaller than penguin contribution. If the penguin deacay includes the intermadiate state of beyond Standard Model, for example SUSY particle, it is possible to search the new physics effect by comparing the sin2\u03c61 which is measured by B0 \u2192 J/\u03c8Ks decay mode. We measured indirect CP-asymmetry, effective sin2\u03c61 and direct CP-asymmetry by B0 \u2192 Ks\u03c00 decay with 253fb-1 data sample, corresponding to 275\u00d7106 BB pairs, accumulated from Jan. 2001 to Jun. 2004 at the KEKB factory. In this analysis, we used two new analysis methods. One is vertex reconsruction with only Ks particle and constrained by interaction point. We developed new vertex reconsruction method and modified vertex resolution for B0 \u2192 Ks\u03c00. Another is measurement of direct CP-asymmetry methos. In basically, we use proper time difference and flavor information, but we can do it from only flavor information. To reduce statistical error of direct CP-asymmetry parameter, we used events which does not have proper time difference information but has flavor information. We reconstructed B0 \u2192 Ks\u03c00 events and obtained 71 candidates, which have proper time difference and flavor information, and 176 candidates, which have only flavor information. We measured CP-asymmetry parameters by un-binned maximum likelihood fit. We got direct CP-asymmetry parameter as -0.11\u00b10.20(stat)\u00b10.09(syst), and indirect CP-asymmetry parameter as +0.32\u00b10.61(stat)\u00b10.13(syst). These results are consistent with Standard Model expectation within error. Since the statistic error are larger than systematic error, we need more statistics to conclude that CP-Violation of B0 \u2192 Ks\u03c00 resides within or beyond the Standard Model expectation.", "subitem_description_type": "Abstract"}]}, "item_6_description_5": {"attribute_name": "\u5185\u5bb9\u8a18\u8ff0", "attribute_value_mlt": [{"subitem_description": "\u65b0\u5927\u535a\uff08\u7406\uff09\u4e59\u7b2c53\u53f7", "subitem_description_type": "Other"}]}, "item_6_description_53": {"attribute_name": "\u5b66\u4f4d\u8a18\u756a\u53f7", "attribute_value_mlt": [{"subitem_description": "\u65b0\u5927\u535a\uff08\u7406\uff09\u4e59\u7b2c53\u53f7", "subitem_description_type": "Other"}]}, "item_6_dissertation_number_52": {"attribute_name": "\u5b66\u4f4d\u6388\u4e0e\u756a\u53f7", "attribute_value_mlt": [{"subitem_dissertationnumber": "13101\u4e59\u7b2c2026\u53f7"}]}, "item_6_full_name_3": {"attribute_name": "\u8457\u8005\u5225\u540d", "attribute_value_mlt": [{"nameIdentifiers": [{"nameIdentifier": "48932", "nameIdentifierScheme": "WEKO"}], "names": [{"name": "\u829d\u7530, \u9054\u4f38"}]}]}, "item_6_publisher_7": {"attribute_name": "\u51fa\u7248\u8005", "attribute_value_mlt": [{"subitem_publisher": "\u65b0\u6f5f\u5927\u5b66\u5927\u5b66\u9662\u81ea\u7136\u79d1\u5b66\u7814\u7a76\u79d1"}]}, "item_6_select_19": {"attribute_name": "\u8457\u8005\u7248\u30d5\u30e9\u30b0", "attribute_value_mlt": [{"subitem_select_item": "author"}]}, "item_creator": {"attribute_name": "\u8457\u8005", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Shibata, Tatsunobu"}], "nameIdentifiers": [{"nameIdentifier": "48931", "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": "2019-08-05"}], "displaytype": "detail", "download_preview_message": "", "file_order": 0, "filename": "13_0002.pdf", "filesize": [{"value": "30.0 MB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_free", "mimetype": "application/pdf", "size": 30000000.0, "url": {"label": "\u672c\u6587", "url": "https://niigata-u.repo.nii.ac.jp/record/4704/files/13_0002.pdf"}, "version_id": "fb0db9ea-f33c-4281-bea4-520c601ba10e"}]}, "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": "Study of CP\u2010Violating Asymmetries in B0 \uffeb Ks \u03c00\u3000Decay", "item_titles": {"attribute_name": "\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_title": "Study of CP\u2010Violating Asymmetries in B0 \uffeb Ks \u03c00\u3000Decay"}, {"subitem_title": "Study of CP\u2010Violating Asymmetries in B0 \uffeb Ks \u03c00\u3000Decay", "subitem_title_language": "en"}]}, "item_type_id": "6", "owner": "1", "path": ["453/455", "468/563/564"], "permalink_uri": "http://hdl.handle.net/10191/1467", "pubdate": {"attribute_name": "\u516c\u958b\u65e5", "attribute_value": "2007-04-23"}, "publish_date": "2007-04-23", "publish_status": "0", "recid": "4704", "relation": {}, "relation_version_is_last": true, "title": ["Study of CP\u2010Violating Asymmetries in B0 \uffeb Ks \u03c00\u3000Decay"], "weko_shared_id": 2}