Effective field theory and unification in AdS backgrounds
Abstract
This work is an extension of our previous work [Phys. Rev. Lett. 89, 131601 (2002)] which showed how to systematically calculate the high energy evolution of gauge couplings in compact AdS_{5} (five dimensional anti de Sitter) backgrounds. We first directly compute the oneloop effects of massive charged scalar fields on the low energy couplings of a gauge theory propagating in the AdS background. It is found that scalar bulk masses (which generically are of the order of the Planck scale) enter only logarithmically in the corrections to the treelevel gauge couplings. As we pointed out previously, we show that the large logarithms that appear in the AdS oneloop calculation can be obtained within the confines of an effective field theory, by running the Planck brane correlator from a high UV matching scale down to the TeV scale. This result exactly reproduces our previous calculation, which was based on AdS conformal field theory duality. We also calculate the effects of scalar fields satisfying nontrivial boundary conditions (relevant for orbifold breaking of bulk symmetries) on the running of gauge couplings.
 Publication:

Physical Review D
 Pub Date:
 December 2003
 DOI:
 10.1103/PhysRevD.68.125011
 arXiv:
 arXiv:hepth/0208060
 Bibcode:
 2003PhRvD..68l5011G
 Keywords:

 11.10.Kk;
 11.25.w;
 Field theories in dimensions other than four;
 Strings and branes;
 High Energy Physics  Theory;
 High Energy Physics  Phenomenology
 EPrint:
 LaTeX, 27 pages