CP Violation via Top Quark Anomalous Interaction at the Fermilab Tevatron
Abstract
Expecting the forthcoming experiment at the upgraded Fermilab Tevatron, we calculated CP-violating polarization asymmetry of t t-bar, A_{CP}= [sigma(p p-bar --> t(-) t-bar(-) X) - sigma(p p-bar --> t(+) t-bar(+) X)]/ sigma(p p-bar --> t t-bar X), due to possible anomalous chromomagnetic (kappa) and chromoelectric (tilde{kappa}) couplings of the gluon to the top quark. Since kappa and tilde{kappa} are sensitive to a contribution from new physics beyond standard model, this observable is useful to search for a signal of new physics. It was seen that the magnitude of A_{CP} depends only on Im(tilde{kappa) and Im(kappa^* tilde{kappa}). Futhermore, we found that when |Im(kappa^* tilde{kappa})|>0.5, one can possibly detect the CP-violation effect as a signal of new physics even if the magnitude of Im(tilde{kappa) is zero.
Keywords
Cite
@article{arxiv.hep-ph/0105117,
title = {CP Violation via Top Quark Anomalous Interaction at the Fermilab Tevatron},
author = {Kazumasa Ohkuma},
journal= {arXiv preprint arXiv:hep-ph/0105117},
year = {2016}
}
Comments
11pages, 2 eps figures, LaTeX2e, JHEP class included