Torsion in Extra Dimensions and One-Loop Observables
High Energy Physics - Phenomenology
2014-07-07 v2 General Relativity and Quantum Cosmology
High Energy Physics - Theory
Abstract
We study gravity with torsion in extra dimensions and derive an effective four-dimensional theory containing four-fermion contact operators at the fundamental scale of quantum gravity in the TeV range. These operators may have an impact on the low-energy observables and can manifest themselves or can be constrained in precision measurements. We calculate possible contributions of these operators to some observables at the one-loop level. We show that the existing precision data on the lepton decay mode of Z boson set limits on the fundamental scale of the gravity and compactification radius, which are more stringent than the limits previously derived in the literature.
Cite
@article{arxiv.1405.0397,
title = {Torsion in Extra Dimensions and One-Loop Observables},
author = {Oscar Castillo-Felisola and Cristobal Corral and Sergey Kovalenko and Ivan Schmidt},
journal= {arXiv preprint arXiv:1405.0397},
year = {2014}
}
Comments
7 pages and 2 figures. Accepted for publication in Phys. Rev. D