Rho Parameter Constraints on Models with Large Compact Dimensions
High Energy Physics - Phenomenology
2007-05-23 v2
Abstract
In models with large extra dimensions, where quantum gravity effects become strong at the TeV scale, the rho-parameter can receive large contributions from one-loop diagrams involving exchange of multiple graviton and dilaton states. These contributions are computed, taking into account cancellation of spurious infrared divergences, and the (finite) results for d = 5 and 6 are compared with current experimental data. It is shown that 5 large extra dimensions are incompatible with the data and d = 6 is severely constrained.
Keywords
Cite
@article{arxiv.hep-ph/9908205,
title = {Rho Parameter Constraints on Models with Large Compact Dimensions},
author = {Prasanta Das and Sreerup Raychaudhuri},
journal= {arXiv preprint arXiv:hep-ph/9908205},
year = {2007}
}
Comments
Latex2e, 23 pages, 4 ps figures, extensively revised and all Feynman diagrams included