ar X iv : h ep - t h / 06 06 05 2 v 1 7 J un 2 00 6 N = 4 , d = 3 nonlinear electrodynamics

ar X iv : h ep - t h / 06 06 07 5 v 1 8 J un 2 00 6 Boundary Terms in Supergravity and Supersymmetry ∗

We begin with the simplest possible introduction to supergravity, and then discuss its spin 3/2 stress tensor. Next, we discuss boundary conditions on fields and boundary actions for N = 1 supergravity. Finally, we discuss new boundary contributions to the mass and central charge of monopoles in N = 4 super Yang-Mills theory. All models are in 3+1 dimensions. YITP-SB-06-21

ar X iv : h ep - p h / 05 06 27 0 v 1 27 J un 2 00 5 Coupled - channel model for charmonium levels and an option for X ( 3872 )

ar X iv : h ep - t h / 06 05 16 5 v 1 1 7 M ay 2 00 6 A new N = 8 nonlinear supermultiplet

We construct a new off-shell N=8, d=1 nonlinear supermultiplet (4,8,4) proceeding from the nonlinear realization of the N=8, d=1 superconformal group OSp(4⋆|4) in its supercoset OSp(4|4) SU(2)R⊗{D,K}⊗SO(4) . The irreducibility constraints for the superfields automatically follow from appropriate covariant conditions on the osp(4⋆|4)-valued Cartan superforms. We present the most general sigma-mo...

ar X iv : h ep - t h / 06 05 23 5 v 2 1 J un 2 00 6 Drag Force in a Charged N = 4 SYM Plasma Elena Cáceres

Following recent developments, we employ the AdS/CFT correspondence to determine the drag force exerted on an external quark that moves through an N = 4 super-Yang-Mills plasma with a non-zero R-charge density (or, equivalently, a non-zero chemical potential). We find that the drag force is larger than in the case where the plasma is neutral.

ar X iv : h ep - p h / 05 06 01 6 v 1 2 J un 2 00 5 Theory Summary of the Electroweak Session for Moriond 2005

I broadly summarize the theoretical contributions in the Electroweak session of the 2005 Moriond meeting under four rubrics: i) neutrinos; ii) cosmology; iii) electroweak interactions; and iv) flavor physics.