4 papers
Nonperturbative Aspect In N=2 Supersymmetric Noncommutative Yang-Mills Theory
Yuhsuke Yoshida
We investigate asymptotic behaviors of the strong coupling limit in the N=2 supersymmetric non-commutative Yang-Mills theory. The strong coupling behavior is quite different from t…
Black Hole Entropy from BPS Closed String
Shuhei Mano, Yuhsuke Yoshida
By using BPS closed string, the entropy is calculated of the extremal five dimensional black hole consisting of Dirichlet onebranes, Dirichlet fivebranes and Kaluza-Klein momentum…
On Instanton Calculations of N=2 Supersymmetric Yang-Mills Theory
Yuhsuke Yoshida
Instanton calculations are demonstrated from a viewpoint of twisted topological field theory. Various properties become manifest such that perturbative corrections are terminated a…
Chiral Symmetry, Heavy Quark Symmetry and Bound States
Yuhsuke Yoshida
I investigate the bound state problems of lowest-lying mesons and heavy mesons. Chiral symmetry is essential when one consider lowest-lying mesons. Heavy quark symmetry plays an ce…