Non-Abelian discrete flavor symmetries from modular symmetry in string compactification

• Material Type: 博士論文
• Title: Non-Abelian discrete flavor symmetries from modular symmetry in string compactification
• Author/Editor: 立石, 卓也
• Author Heading: 立石, 卓也
• Publication, Distribution, etc.: Hokkaido University
• Publication Date: 2019-03-25
• Publication Date (W3CDTF): 2019-03-25
• Alternative Title: 超弦理論におけるモジュラー対称性由来の非可換離散フレーバー対称性に関する研究
• Contributor: 小林, 達夫; 鈴木, 久男; 中山, 隆一; 瀬戸, 治
• Degree grantor/type: 北海道大学
• Date Granted: 2019-03-25
• Date Granted (W3CDTF): 2019-03-25
• Dissertation Number: 甲第13564号
• Degree Type: 博士(理学)
• Conferring No. (Dissertation): 甲第13564号
• Text Language Code: eng
• NDC: 400
• Target Audience: 一般
• Note (General): Modular symmetry is a symmetry on two dimensional torus T2 typically considered in string compacti cation. First, we study the modular symmetry in magnetized D-brane models on T2. Zero-modes on T2 with magnetic flux M= 2 (in a certain unit) are transformed as doublet of S3 with certain identi cation under the transformation of the modulus. We also study the modular symmetry in heterotic orbifold models. The T2/Z4 orbifold model has the same modular symmetry as the magnetized D-brane model with M= 2. Next, we study lepton flavor models with S3 and A4 symmetries from the modular group. We consider S3 model with flavons and A4 models with no flavon. In A4 model, we classify our neutrino models along with typeI seesaw model, Weinberg operator model, and the Dirac neutrino model.In the normal hierarchy of neutrino masses, the seesaw model is available by taking account for recent experimental data of neutrino oscillations. In the case of inverted hierarchy, the Dirac neutrino model is consistent with experimental data.; (主査) 教授 小林 達夫, 教授 鈴木 久男, 准教授 中山 隆一, 特任准教授 瀬戸 治; 理学院（宇宙理学専攻）
• DOI: 10.14943/doctoral.k13564; https://doi.org/10.14943/doctoral.k13564
• Persistent ID (NDL): info:ndljp/pid/11288215; https://dl.ndl.go.jp/pid/11288215
• Collection: 障害者向け資料
• Collection (Materials For Handicapped People:1): テキストデータ
• Collection (particular): 国立国会図書館デジタルコレクション > デジタル化資料 > 博士論文; https://dl.ndl.go.jp/collections/A00014
• Acquisition Basis: 博士論文（自動収集）
• Date Accepted (W3CDTF): 2019-06-03T12:31:31+09:00
• Date Created (W3CDTF): 2019-03
• Format (IMT): PDF
• Access Restrictions: 国立国会図書館内限定公開
• Service for the Digitized Contents Transmission Service: 図書館・個人送信対象外
• Availability of remote photoduplication service: 可
• Periodical Title (URI): http://dx.doi.org/10.14943/doctoral.k13564; http://hdl.handle.net/2115/74294
• Is Referenced By (URI): http://hdl.handle.net/2115/74293
• Data Provider (Database): 国立国会図書館 : 国立国会図書館デジタルコレクション; https://dl.ndl.go.jp

• Summary, etc.: Modular symmetry is a symmetry on two dimensional torus T2 typically considered in string compacti cation. First, we study the modular symmetry in mag...