Professor Taichiro Kugo

Area and Subject Taught Particle Physics
Research Theme(s) Grand Unified Theories, Cosmological Constant Problem, Supergravity
Academic Degrees Ph.D. in Science, Kyoto University
Keywords for Research Field Field Theories, Gauge Theories, Grand Unified Theories, Supergravity
Office Phone Number Not Public
e-mail

Research Overview

The Standard Model in particle physics, established in 1970’s, elucidated that all the fundamental interactions in Nature, Strong, Week and Electromagnetic interactions, are described as gauge interactions. It also strongly suggests that more unified theory called ‘grand unified theories’should exist beyond the Standard Model.
As trials toward such unified theories, there are superstring theories, or supergravity theories as their low energy effective theories, and various higher dimensional space-time models, or brane world models.
Here, in this laboratory, we examine these various trials and try to construct new unified models. We also develop basic theoretical techniques in field theories for such purposes.
At present, we are tackling to big fundamental problems, such as “Why there are three generations for quarks and leptons?”, “Why doesn’t Einstein gravity feel the vacuum energy in field theories, like the chiral condensation energy in QCD, or Higgs condensation energy in the electroweak theory?” We are also interested in reconsidering the superconformal tensor calculus in supergravity theories.

Notable Publications and Works in the Last Three Years

  • T. Kugo, R. Yokokura and K. Yoshioka, “Superspace Gauge Fixing in Yang-Mills Matter Coupled Conformal Supergravity”, Prog. Theor. Exp. Phys. 2016 (2016) 093B03, [DOI: 10.1093/ptep/ptw119].
  • T. Kugo, R. Yokokura and K. Yoshioka, “Component versus Superspace Approaches to D=4, N=1 Conformal Supergravity”, Prog. Theor. Exp. Phys. 2016 (2016) 073B07, [DOI: 10.1093/ptep/ptw090].
  • T. Kugo, “Complex Group Gauge Theory”, JPS Conf. Proc. 7 (2015) 010003.
  • T. Kugo and N. Ohta, “Covariant Approach to the No-ghost Theorem in Massive Gravity”, to appear in Prog. Theor. Exp. Phys. 2014 (2014) 043B04, [DOI: 10.1093/ptep/ptu046]