Strong CP Problem with 10^{32} Standard Model Copies
High Energy Physics - Theory
2008-11-26 v1 High Energy Physics - Phenomenology
Abstract
We show that a recently proposed solution to the Hierarchy Problem simultaneously solves the Strong CP Problem, without requiring an axion or any further new physics. Consistency of black hole physics implies a non-trivial relation between the number of particle species and particle masses, so that with ~10^{32} copies of the standard model, the TeV scale is naturally explained. At the same time, as shown here, this setup predicts a typical expected value of the strong-CP parameter in QCD of theta ~ 10^{-9}. This strongly motivates a more sensitive measurement of the neutron electric dipole moment.
Cite
@article{arxiv.0712.3170,
title = {Strong CP Problem with 10^{32} Standard Model Copies},
author = {Gia Dvali and Glennys R. Farrar},
journal= {arXiv preprint arXiv:0712.3170},
year = {2008}
}
Comments
8 pp