SUSY07

Session

Theoretical Models (String Theory and Formal Aspects of SUSY) 7

Models7

31 Jul 2007, 16:30

Physics Building (Karlsruhe University)

120. Effective Action of Domain Wall Networks

Prof. Norisuke Sakai (Tokyo Institute of Technology)

31/07/2007, 16:30

Theoretical Models (String Theory and Formal Aspects of SUSY)

Parallel Talk

Domain walls have been useful to construct models of brane-world. We study composite system of domain walls forming junctions and netwroks. U(NC) gauge theory with NF fundamental scalars admits BPS junctions of domain walls. When the networks/webs of these walls contain loops, their size moduli give localized massless modes. We construct K"ahler potential of their effective action....

133. Deformation of Dijkgraaf-Vafa Relation via Spontaneously Broken N=2 Supersymmetry

Mr Kazunobu Maruyoshi (Osaka City University)

31/07/2007, 16:50

Theoretical Models (String Theory and Formal Aspects of SUSY)

Parallel Talk

It is known that the fermionic shift symmetry of the N=1, U(N) gauge model with a superpotential of an adjoint chiral superfield is replaced by the second (spontaneously broken) supersymmetry in the N=2, U(N) gauge model with a prepotential and Fayet-Iliopoulos parameters. Based on a diagrammatic analysis, we demonstrate how the well-known form of the effective superpotential in the former...

145. Instantons in deformed supersymmetric gauge theories

Dr Shin Sasaki (University of Helsinki)

31/07/2007, 17:10

Theoretical Models (String Theory and Formal Aspects of SUSY)

Parallel Talk

Recently, non-perturbative effects in supersymmetric gauge theories are intensively investigated by the help of closed string backgrounds. Especially, the graviphoton background is used to calculate the instanton partition function in N=2 super Yang-Mills (SYM) theory. The deformed ADHM construction of instantons is quite efficient tool for the investigation of non-perturbative...

217. Higher Derivative Corrections in M-theory via Local Supersymmetry

Dr Yoshifumi HYAKUTAKE (Department of Physics, Osaka University)

31/07/2007, 17:30

Theoretical Models (String Theory and Formal Aspects of SUSY)

Parallel Talk

Higher derivative terms in M-theory are investigated by applying the Noether method. Cancellation of variations under the local supersymmetry is examined to the order linear in $F$ by a computer program. Structure of $R^4$ terms is uniquely determined and exactly matches with one-loop effective terms in type IIA superstring theory. A part of $R^3F^2$ terms is also determined.

357. Counting BPS Solitons and Applications

Dr Kazutoshi Ohta (Physics Department, Graduate School of Science, Tohoku University)

31/07/2007, 17:50

Theoretical Models (String Theory and Formal Aspects of SUSY)

Parallel Talk

We propose a novel and simple method to compute the partition function of statistical mechanics, or the volume of the moduli space of BPS vortices in supersymmetric gauge theory. We use a D-brane realization of the vortices and T-duality relation to domain walls. We there use a special limit where domain walls reduce to gas of hard (soft) one- dimensional rods for Abelian (non-Abelian)...