We study the superalgebra of the M-theory on a fully supersymmetric pp-wave. We identify the algebra as the special unitary Lie superalgebra, su(2|4 ; 2, 0) or su(2|4 ; 2, 4), and analyze its root structure. We discuss the typical and atypical representations deriving the typicality condition explicitly in terms of the energy and other four quantum numbers. We classify the BPS multiplets preser...

We construct a little Higgs model using a simple global symmetry group SU(9) spontaneously broken to SU(8). The electroweak interactions are extended to SU(3) × U(1) and embedded in SU(9). At the electroweak scale, our model is a two Higgs-doublet model. At the TeV scale, there are additional states, which are responsible for the cancellation of one loop quadratic divergences. We compute the ef...

This is the summary of my talk, given at the 2nd RHIC II science workshop in the electromagnetic-probes-working group. I shortly summarize some of the fundamental physical questions, related to chiral symmetry, which can possibly be addressed by measurement of electromagnetic probes. 1 QCD and Chiral Symmetry Due to the asymptotic freedom of QCD [Mut87], i.e., the fact that the renormalized run...