Elvang Abstract

The proposed perturbative finiteness of N=8 supergravity has recently received much attention, including explicit calculation of loop amplitudes. An important ingredient in computations of loop amplitudes is a relationship between tree level amplitudes in N=8 supergravity and N=4 super Yang-Mills theory. These so-called KLT relations are derived in string theory, but are quite surprising from the point of view of field theory. In the talk I'll review relevant aspects of the subject and discuss approaches for gaining insight into the relationship between gravity and gauge theory.

Chen Abstract

The current experimental values for neutrino mixing angles are very close to the predictions of the so-called ``tri-bimaximal'' mixing matrix. I will describe a recent model which gives rise to, for the first time, the tri-bimaximal neutrino mixing and realistic quark CKM matrix simultaneously. The model is based on SU(5) GUT combined with the double tetrahedral group as a family symmetry, and it has only nine parameters to account for all 18 fermion masses and mixing angles. The model also predicts a new sum rule relating the solar mixing angle for the neutrinos and the Cabibbo angle in the quark sector, as a result of the Georgi-Jarlskog relations. The double tetrahedral group may be originated from extra dimensions as a residual symmetry upon orbifold compactification.  

Bergman Abstract

I'll discuss the different phases of the Sakai-Sugimoto holographic QCD model at finite temperature and baryon chemical potential, and derive the phase diagram. The diagram is qualitatively similar to the one expected in QCD. In particular at low temperature and high density (or chemical potential) we find that the dominant phase has broken chiral symmetry. 

Lyons Abstract

No abstract is available at present.

Berger Abstract

No abstract is available at present.