Optimal-Observable Analysis of Possible New Physics Using the b-quark in gamma gamma -> tt -> bX

Bohdan Grzadkowski, Zenro Hioki, Kazumasa Ohkuma +1

We study possible anomalous top-quark couplings generated by SU(2) x U(1) gauge invariant dimension-6 effective operators, using the final b-quark momentum distribution in gamma ga…