CP violating angular asymmetries of b and bbar quarks in e+e- -> t tbar
High Energy Physics - Phenomenology
2016-08-25 v2
Abstract
We obtain analytical formulae for the cross section and the angular distributions of the b(bbar) quarks in the process e+e- -> t tbar, with t -> W+ b (tbar -> W- bbar) assuming CP violation in the \gamma t tbar and Z t tbar vertices. We present CP violating asymmetries, which measure separately the real and imaginary parts of the electroweak dipole moment form factors of the top, d^{\gamma}(s) and d^{Z}(s). We give a numerical analysis of these asymmetries within the Minimal Supersymmetric Standard Model with complex parameters. They turn out to be of order <= 10^{-3}.
Keywords
Cite
@article{arxiv.hep-ph/9802352,
title = {CP violating angular asymmetries of b and bbar quarks in e+e- -> t tbar},
author = {A. Bartl and E. Christova and T. Gajdosik and W. Majerotto},
journal= {arXiv preprint arXiv:hep-ph/9802352},
year = {2016}
}
Comments
22 pages LaTeX with 3x3 figures included; some definitions for polarization asymmetries and some notations are changed and some references added