A Real CKM Matrix and Physics Beyond the Standard Model
High Energy Physics - Phenomenology
2009-10-31 v1
Abstract
We study the possible existence of a real Cabibbo-Kobayashi-Maskawa (CKM) matrix, with CP violation originating from physics beyond the standard model (SM). We show that present experimental data allow for a real CKM matrix provided that new physics also contributes to Delta m_{B_d} by at least 20% of the SM contribution (for rho > 0), besides generating CP violation in the kaon sector. The naturalness of a real CKM matrix is studied within the framework of general multi-Higgs-doublet models with spontaneous CP violation. As an example, we discuss a specific two-Higgs-doublet model and its implications for CP asymmetries in non-leptonic neutral B-meson decays.
Keywords
Cite
@article{arxiv.hep-ph/9904379,
title = {A Real CKM Matrix and Physics Beyond the Standard Model},
author = {G. C. Branco and F. Cagarrinho and F. Krüger},
journal= {arXiv preprint arXiv:hep-ph/9904379},
year = {2009}
}
Comments
19 pages, LaTeX2e, 1 figure, uses amssymb, elsart, psfig, and subeqn style files