Probing Anomalous Top-Quark Couplings Induced by Dim.6 Operators at Photon Colliders
High Energy Physics - Phenomenology
2012-07-04 v3 High Energy Physics - Experiment
Abstract
Possible anomalous top-quark couplings induced by SU(2) x U(1) gauge-invariant dimension-6 effective operators were studied in the process of t t-bar productions and decays at polarized gamma gamma colliders. Two CP-violating asymmetries, a linear-polarization asymmetry and a circular-polarization asymmetry, were computed including both non-standard [t t-bar gamma] and [gamma gamma H] couplings. An optimal-observable analysis for the process gamma gamma --> t t-bar --> l^{+-} ... was performed in order to estimate the precision for determination of all relevant non-standard couplings, including the anomalous tbW coupling.
Keywords
Cite
@article{arxiv.hep-ph/0310159,
title = {Probing Anomalous Top-Quark Couplings Induced by Dim.6 Operators at Photon Colliders},
author = {Bohdan Grzadkowski and Zenro Hioki and Kazumasa Ohkuma and Jose Wudka},
journal= {arXiv preprint arXiv:hep-ph/0310159},
year = {2012}
}
Comments
23 pages, Latex2e, Two eps-figures. Final version which is to appear in Nucl.Phys.B