In the past, I have studied supersymmetry, strings on orbifolds, finite temperature field theory, and quantum gravity. My recent interest is in quantum field theories with extra dimensions, which may be regarded as low energy effective theories of string theory. I am trying to reveal a framework of quantum field theory with extra dimensions. Since Poincare invariance imposes no restrictions on the extra dimensions, the framework of higher dimensional quantum field theory is expected to be much larger than that of 4-dimensional theory. Recent works on this subject suggest that extra dimensions can give rich physical consequences at low energies more than what one might expect naively. I believe that there exist extra dimensions in Nature and the geometry can explain some of the mysteries of the Standard Model. Through the study of extra dimensions, I hope to find a clue to the final theory.

Main Publications

• Tomo-hiro Abe, Yukihiro Fujimoto, Tatsuo Kobayashi, Takashi Miura, Kenji Nishiwaki, Makoto Sakamoto and Yoshiyuki Tatsuta, "Classification of three-generation models on magnetized orbifolds", Nucl.Phys. B 894 (2015) 374-406, arXiv:1501.02787 [hep-ph]
• Yukihiro Fujimoto, Kenji Nishiwaki, Makoto Sakamoto and Ryo Takahashi, "Realization of lepton masses and mixing angles from point interactions in an extra dimension", JHEP 1410 (2014) 191, arXiv:1405.5872 [hep-ph]
• Makoto Sakamoto and Kazunori Takenaga, "Standard model with new order parameters at finite temperature", Phys.Rev. D 89 (2014) 10, 105032, arXiv:1312.7052 [hep-th]
• Makoto Sakamoto, "Strong Coupling Quantum Einstein Gravity at a z=2 Lifshitz Point", Phys.Rev. D 79 (2009) 124038, arXiv:0905.4326 [hep-th].
• Mitsuhiro Kato, Makoto Sakamoto and Hiroto So, "Taming the Leibniz Rule on the Lattice", JHEP 0805 (2008) 057, arXiv:0803.3121 [hep-lat].
• C.S. Lim, Tomoaki Nagasawa, Makoto Sakamoto and Hidenori Sonoda, "Supersymmetry in gauge theories with extra dimensions", Phys.Rev. D 72 (2005) 064006, hep-th/0502022.
• Hisaki Hatanaka, Makoto Sakamoto, Motoi Tachibana and Kazunori Takenaga, "Many brane extension of the Randall-Sundrum solution", Prog.Theor.Phys. 102 (1999) 1213-1218, hep-th/9909076.
• Makoto Sakamoto, Motoi Tachibana and Kazunori Takenaga, "Spontaneous supersymmetry breaking from extra dimensions", Phys.Lett. B 458 (1999) 231-236, hep-th/9902070.
• Makoto Sakamoto, "N=1/2 Supersymmetry in Two Dimensions", Phys. Lett. B151 (1985) 115-118.
• Norisuke Sakai and Makoto Sakamoto, "Lattice Supersymmetry and the Nicolai Mapping", Nucl.Phys. B 229 (1983) 173.