Ibaraki University's
Graduate School of Science and Engineering (Science)
Department of Science (Physics Course)



Academic background

  1. Osaka University 1991 Graduated
  2. Osaka University Doctor later 1996/03 Completed

Academic degrees

  1. 博士(理学) Osaka University 1996/03

Research Areas

  1. Elementary Particle/Atomic Nucleus/Cosmic Ray/Space Physics

Research keywords

  1. 量子力学と一般相対性理論を結合した超弦理論

Subject of research

  1. 超弦理論の研究


  1. Research paper (scientific journal) Joint A Note on Supersymmetries in AdS_5/CFT_4 Fumiya Takeuchi and Makoto Sakaguchi Mod. Phys. Lett. A 33 (2018) no.02, 1850015 (13 pages) 2018/01/12 10.1142/S0217732318500153 The N=4 superconformal algebra is derived from the symmetry transformations of fields in the N=4 SYM action in D=4. We use a Majorana-Weyl spinor in D=10 instead of four Weyl spinors in D=4. This makes it transparent to relate generators of the N=4 superconformal algebra to those of the super-AdS_5XS^5 algebra. Especially, we obtain the concrete map from the supersymmetries Q and conformal supersymmetries S in N=4 SYM to the supersymmetries (Q_1, Q_2) in the AdS_5XS^5 background.
  2. Research paper (scientific journal) Joint Non-commutative M-branes from Open Pure Spinor Supermembrane Sota Hanazawa and Makoto Sakaguchi Nucl. Phys. B 927 (2018) 566-578 2018/01/10 10.1016/j.nuclphysb.2018.01.003 Open supermembrane with a constant three-form flux in the pure spinor formalism is examined. The BRST symmetry of the open supermembrane action leads to non-commutative (NC) M-branes. In addition to the NC M5-brane with a self-dual two-form flux, we find a NC M9-brane with an electric flux and a NC M9-brane with a magnetic flux. The former reduces in the critical electric flux limit to an M2-brane on the M9-brane, while the latter reduces in the strong magnetic flux limit to infinitely many Kaluza-Klein monopoles dissolved into the M9-brane. These NC M-branes are shown to preserve a half of 32 supersymmetries.
  3. Research paper (scientific journal) Joint D-branes from Pure Spinor Superstring in AdS_5 x S^5 Background Sota Hanazawa, Makoto Sakaguchi Nuclear Physics B914 (2017) 234 914, 234-247 2016/11/18 We examine the surface term for the BRST transformation of the open pure spinor superstring in an AdS_5 x S^5 background. We find that the boundary condition to eliminate the surface term leads to a classification of possible configurations of 1/2 supersymmetric D-branes.
  4. Research paper (scientific journal) Joint No pair production of open strings in a plane-wave background M. Sakaguchi, H. Shin and K. Yoshida Phys.Rev. D90 (2014) 6, 066009 2014/09/17
  5. (MISC) Introduction and explanation (bulletin of university, research institution) Joint 学生実験開発に向けた環境放射線のスペクトル測定について 松浦壮、阪口真 慶應義塾大学日吉紀要 自然科学52, 59-67 2012/09/30

Research presentations

  1. Oral presentation(invited, special) TBA The 2nd Workshop on "Mathematics and Physics in General Relativity" 2019/03/22
  2. Oral presentation(general) AdS空間上の高階スピンゲージ理論の反場を含んだ作用について 日本物理学会 第74回年次大会 2019/03/17
  3. Oral presentation(general) 無質量高階スピンゲージ理論の反場を含んだBRST不変な作用 日本物理学会2018年秋季大会 2018/09/15
  4. Oral presentation(general) Plane-wave背景上の超弦理論のdouble spinor形式 日本物理学会2018年秋季大会 2018/09/15
  5. Oral presentation(general) Pure Spinor形式におけるBRS電荷保存則から導くDブレーン方程式 日本物理学会第73回年次大会(2018年) 2018/03/25

Alloted class

  1. Introduction to Elementary Particle Physics
  2. Special lectures on particle physics
  3. Exercises in Quantum Physics
  4. 基礎物理学II

Memberships of academic societies

  1. 日本物理学会 1993-Present

Committee Career

  1. 素粒子論グループ 素粒子論委員 2015/04/01-2017/03/31