Probing the Top-Quark Electric Dipole Moment at a Photon Linear Collider
S. Y. Choi, K. Hagiwara
Abstract
We probe the top-quark electric dipole moment (EDM) in top-quark pair production via photon-photon fusion at a photon linear collider. We show how linearly-polarized photon beams can be used to extract information on the top-quark EDM without the use of complicated angular correlations of top-quark decay products. If the luminosity of the laser back-scattered photon-photon collisions is comparable to that of the e+e- collisions, then the measurement of the top-quark EDM obtained by counting top-quark-production events in photon fusion can be as accurate as the measurement obtained by studying the tt decay correlations in e+e- collisions using a perfect detector.
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