Prof.
Norisuke Sakai
(Tokyo Institute of Technology)

7/31/07, 4:30 PM

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....

Mr
Kazunobu Maruyoshi
(Osaka City University)

7/31/07, 4:50 PM

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...

Dr
Shin Sasaki
(University of Helsinki)

7/31/07, 5:10 PM

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...

Dr
Yoshifumi HYAKUTAKE
(Department of Physics, Osaka University)

7/31/07, 5:30 PM

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.

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

7/31/07, 5:50 PM

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)...