Naturalness of CP Violation in the Standard Model
High Energy Physics - Phenomenology
2010-04-15 v2 High Energy Physics - Theory
Abstract
We construct a natural measure on the space of CKM matrices in the standard model, assuming the fermion mass matrices are randomly selected from a distribution which fits the observed quark mass hierarchy. This measure allows us to assess the likelihood of Jarlskog's CP violation parameter J taking its observed value J 3 x 10^{-5}. While well below the mathematically allowed maximum, we find that this value is in fact typical, once the observed quark masses are assumed.
Cite
@article{arxiv.0810.4368,
title = {Naturalness of CP Violation in the Standard Model},
author = {Gary W. Gibbons and Steffen Gielen and C. N. Pope and Neil Turok},
journal= {arXiv preprint arXiv:0810.4368},
year = {2010}
}
Comments
4 pages; corrected minor errors, added discussion of the work of Donoghue et al