Prof.
Stefan Groot Nibbelink
(ASC, LMU)
23/08/2010, 16:12
Formal
We construct an MSSM with three generations from the heterotic string compactified on a smooth 6D internal manifold using Abelian gauge fluxes only. The compactification space is obtained as a resolution of the T6/Z2×Z2×Z2,free orbifold. The Z2,free involution of such a resolution breaks the S U(5) GUT group down to the SM using a suitably chosen Wilson line. Surprisingly the spectrum on a given...
Dr
Goro Ishiki
(CQUeST (Sogang University))
23/08/2010, 16:29
Formal
We numerically compute the vacuum expectation value (VEV) of the BPS Wilson loop operator in 4 dimensional planar N=4 Super Yang-Mills theory. Since it is difficult to keep supersymmetries in the lattice theory, we use an alternative regularization based on an idea of the large N reduction. Using this new regularization, one can keep SU(2|4) symmetry which contains 16 supersymmetries. We...
Prof.
Norisuke Sakai
(tokyo woman's christian university)
23/08/2010, 16:46
Formal
A particular dimensional reduction of SU(2N) Yang-Mills theory on Sigma x S^2, with Sigma a Riemann surface, yields an S(U(N) x U(N)) gauge theory on Sigma, with a matrix Higgs field.
The SU(2N) self-dual Yang--Mills equations reduce to Bogomolny equations for vortices on Sigma. These equations are formally integrable if Sigma is the hyperbolic plane, and we present a subclass of solutions.
Dr
Christoph Lüdeling
(Uni Bonn)
23/08/2010, 17:03
Formal
I present a formulation of seven-dimensional super-Yang-Mills theory in N=1 superfields and outline some applications.
Mr
Leonardo Brizi
(EPFL, Lausanne)
23/08/2010, 17:20
Formal
We study how and under which conditions heavy fields can be integrated out in a supersymmetric way in globally and locally supersymmetric theories. We argue that to neglect higher-derivatives compatibly with supersymmetry one has to require that also fermions and auxiliary fields are small in unit of the heavy fields mass scale. In supergravity theories this means in particular that the...
Mrs
Zheng Sun
(Tata Institute of Fundamental Research)
23/08/2010, 17:37
Formal
Using the effective field theory method, the vacuum distribution with respect to the SUSY breaking scale and cosmological constant is obtained from general F-type SUSY breaking models. There is always a parameter region where a metastable vacuum exists. By inserting mass scales to the superpotential and Kahler potential, The amount of tuning is obtained in general cases.
Mr
Takuya Saka
(Tokyo Institute of Technology)
23/08/2010, 17:54
Formal
We derived the instanton effective action of N=2 super Yang-Mills theory deformed by generic Omega-background. In the string theory context, the instanton effective action is computed as the D-instanton moduli effective action of fractional D3/D(-1)-brane system and Omega-background deformation to the instanton effective action can be realized as the effect of appropriate constant RR 3-form...
