Studying Possible Anomalous Top-Quark Couplings at Photon Colliders
classification
✦ hep-ph
hep-ex
keywords
gammacouplingsanomalousbeampolarizationspossibletbaranalysis
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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.
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