ar X iv : h ep - t h / 06 01 17 9 v 1 2 4 Ja n 20 06 Casimir energy and the superconducting phase transition

ar X iv : h ep - p h / 06 01 17 8 v 1 2 0 Ja n 20 06 Locked Quintessence and Cold Dark Matter

A supersymmetric hybrid potential model with low energy supersymmetry breaking scale (MS ∼ 1 − 10Tev) is presented for both dark matter and dark energy. Cold dark matter is associated with a light modulus field (∼ 10−100Mev) undergoing coherent oscillations around a saddle point false vacuum with the presently observed energy density (ρ0 ∼ 10 eV ). The latter is generated by its coupling to a l...

ar X iv : h ep - t h / 06 01 19 5 v 1 2 6 Ja n 20 06 Energies of Quantum QED Flux Tubes ∗

In this talk I present recent studies on vacuum polarization energies and energy densities induced by QED flux tubes. I focus on comparing three and four dimensional scenarios and the discussion of various approximation schemes in view of the exact treatment.

ar X iv : h ep - t h / 06 12 12 9 v 3 1 1 Ja n 20 07 STRING COSMOLOGY

ar X iv : h ep - t h / 06 01 13 5 v 1 1 9 Ja n 20 06 Nonabelian solutions in

We consider static, nonabelian solutions in N = 4, D = 5 Romans’ gauged supergravity model. Numerical arguments are presented for the existence of asymptotically anti-de Sitter configurations in the N = 4 version of the theory, with a dilaton potential presenting a stationary point. Considering the version of the theory with a Liouville dilaton potential, we look for configurations with unusual...

ar X iv : h ep - p h / 06 01 08 5 v 1 1 1 Ja n 20 06 Techniques for one - loop tensor integrals in many - particle processes

We briefly sketch the methods for a numerically stable evaluation of tensor one-loop integrals that have been used in the calculation of the complete electroweak one-loop corrections to e + e − → 4 fermions. In particular, the improvement of the new methods over the conventional Passarino–Veltman reduction is illustrated for some 4-point integrals in the delicate limits of small Gram (and other...