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Optimal Beam Polarizations for New-Physics Search through gamma gamma -> t tbar -> lX/bX

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.

preprint2005arXivOpen access
Bohdan GrzadkowskiZenro HiokiKazumasa OhkumaJose Wudka
hep-exhep-ph
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Open access4 authors2 topics
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Bohdan GrzadkowskiZenro HiokiKazumasa OhkumaJose Wudka

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