2007 OUTBURST OF 17P/HOLMES: THE ALBEDO AND THE TEMPERATURE OF THE DUST GRAINS
- M. Ishiguro, J. Watanabe, Hiroki Akisawa
- Physics, Geology
- 10 May 2010
Based on optical and infrared observations, we study the albedo and the temperature of the dust grains associated with the spectacular 2007 outburst of Jupiter-family comet 17P/Holmes. We found that…
Supersymmetry in quantum mechanics with point interactions
- Tomoaki Nagasawa, M. Sakamoto, K. Takenaga
- Physics
- 17 December 2002
Taming the Leibniz rule on the lattice
- Mitsuhiro Kato, M. Sakamoto, H. So
- Mathematics
- 21 March 2008
We study a product rule and a difference operator equipped with Leibniz rule in a general framework of lattice field theory. It is shown that the difference operator can be determined by the product…
Supersymmetry in gauge theories with extra dimensions
- C. Lim, Tomoaki Nagasawa, M. Sakamoto, H. Sonoda
- Physics
- 2 February 2005
We show that a quantum-mechanical N=2 supersymmetry is hidden in 4d mass spectrum of any gauge invariant theories with extra dimensions. The N=2 supercharges are explicitly constructed in terms of…
Higher order contributions in finite temperature renormalization group
- K. Funakubo, M. Sakamoto
- Physics
- 5 March 1987
ZN twisted orbifold models with magnetic flux
- T. Abe, Y. Fujimoto, Tatsuo C. Kobayashi, Takashi Miura, Kenji Nishiwaki, M. Sakamoto
- Physics
- 19 September 2013
A bstractWe propose new backgrounds of extra dimensions to lead to four-dimensional chiral models with three generations of matter fermions, that is T2/ZN twisted orbifolds with magnetic fluxes. We…
Quark mass hierarchy and mixing via geometry of extra dimension with point interactions
- Y. Fujimoto, Tomoaki Nagasawa, Kenji Nishiwaki, M. Sakamoto
- Physics
- 24 September 2012
We propose a new model which can simultaneously and naturally explain the origins of fermion generation, quark mass hierarchy, and the Cabibbo–Kobayashi–Maskawa matrix from the geometry of an extra…
Realization of lepton masses and mixing angles from point interactions in an extra dimension
- Y. Fujimoto, Kenji Nishiwaki, M. Sakamoto, R. Takahashi
- Physics
- 22 May 2014
A bstractWe investigate a model on an extra dimension S1 where plenty of effective boundary points described by point interactions (zero-thickness branes) are arranged. After suitably selecting the…
Lattice supersymmetry and the nicolai mapping
- N. Sakai, M. Sakamoto
- Mathematics
- 12 December 1983
Extended supersymmetry and its reduction on a circle with point singularities
- Tomoaki Nagasawa, M. Sakamoto, K. Takenaga
- Physics, Mathematics
- 16 May 2005
We investigate N-extended supersymmetry in one-dimensional quantum mechanics on a circle with point singularities. For any integer n, N = 2n + 1 supercharges are explicitly constructed in terms of…
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