2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/104515Search 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.12 pages, no figures; v2: Typos correctedHigh Energy Physics - PhenomenologyHigh Energy Physics - Experimenttext