Optimal Beam Polarizations for New-Physics Search through gamma gamma -> t tbar -> lX/bX
High Energy Physics - Phenomenology
2012-07-04 v4 High Energy Physics - Experiment
Abstract
We perform an optimal-observable analysis of the final charged-lepton/b-quark momentum distributions in gamma+gamma -> t+tbar -> lX/bX for various beam polarizations in order to study possible anomalous t-tbar-gamma, tbW and gamma-gamma-H couplings, which could be generated by SU(2)xU(1) gauge-invariant dimension-6 effective operators. We find optimal beam polarizations that will minimize the uncertainty in determination of those non-standard couplings. We also compare e+ebar and gamma+gamma colliders from the viewpoint of the anomalous-top-quark-coupling determination.
Cite
@article{arxiv.hep-ph/0508183,
title = {Optimal Beam Polarizations for New-Physics Search through gamma gamma -> t tbar -> lX/bX},
author = {Bohdan Grzadkowski and Zenro Hioki and Kazumasa Ohkuma and Jose Wudka},
journal= {arXiv preprint arXiv:hep-ph/0508183},
year = {2012}
}
Comments
Final version, published in JHEP : more detailed description of the basic framework given with some new references, and three related appendices added