4 papers
N=2 Instanton Effective Action in Omega-background and D3/D(-1)-brane System in R-R Background
Katsushi Ito, Hiroaki Nakajima, Takuya Saka +1
We study the relation between the ADHM construction of instantons in the Omega-background and the fractional D3/D(-1)-branes at the orbifold singularity of C \times C^2/Z_2 in Ramo…
N=1/2 supersymmetric four-dimensional non-linear sigma-models from non-anti-commutative superspace
T. Hatanaka, S. V. Ketov, Y. Kobayashi +1
The component structure of a generic N=1/2 supersymmetric Non-Linear Sigma-Model (NLSM) defined in the four-dimensional (Euclidean) Non-Anti-Commutative (NAC) superspace is investi…
Summing up Non-anti-commutative Kaehler potential
T. Hatanaka, S. V. Ketov, S. Sasaki
We offer a simple non-perturbative formula for the component action of a generic N=1/2 supersymmetric chiral model in terms of an arbitrary number of chiral superfields in four dim…
Non-Anti-Commutative deformation of effective potentials in supersymmetric gauge theories
T. Hatanaka, S. V. Ketov, Y. Kobayashi +1
We studied a nilpotent Non-Anti-Commutative (NAC) deformation of the effective superpotentials in supersymmetric gauge theories, caused by a constant self-dual graviphoton backgrou…