arXiv:hep-ph/0511038·v2·High Energy Physics — Phenomenology
Studying Possible Anomalous Top-Quark Couplings at Photon Colliders
Bohdan Grzadkowski (Warsaw U.)🇵🇱 · Zenro Hioki (U. Tokushima)🇯🇵 · Kazumasa Ohkuma (Fukui U. Tech.)🇯🇵 · Jose Wudka (UC, Riverside)🇺🇸
Abstract
Search for new-physics through possible anomalous t tbar gamma, tbW and gamma gamma H couplings which are generated by SU(2) X U(1) gauge-invariant dimension-6 effective operators is discussed, using energy and angular distributions of final charged-lepton/ b-quark in gamma gamma -> t tbar -> l X / bX for various beam polarizations. Optimal beam polarizations that minimize uncertainty in determination of those non-standard couplings are found performing an optimal-observable analysis.
Comments: 12 pages, no figures; v2: Typos corrected