Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2002-07-23
Nucl.Phys.B653:109-122,2003
Physics
High Energy Physics
High Energy Physics - Theory
14 pages, LaTeX. Final version with new references included, to be published in Nucl. Phys. B
Scientific paper
10.1016/S0550-3213(03)00039-7
We consider a supersymmetric model with a single matter supermultiplet in a five-dimensional space-time with orbifold compactification along the fifth dimension. The boundary conditions on the two orbifold planes are chosen in such a way that supersymmetry remains unbroken on the boundaries. We calculate the vacuum energy-momentum tensor in a configuration in which the boundary branes are moving with constant velocity. The results show that the contribution from fermions cancels that of bosons only in the static limit, but in general a velocity-dependent Casimir energy arises between the branes. We relate this effect to the particle production due to the branes motion and finally we discuss some cosmological consequences.
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