Probing anomalous quartic couplings in eγ and γγ colliders

We analyze the potential of the e+e- linear colliders, operating in the eγ and γγ modes, to probe anomalous quartic vector-boson interactions through the multiple production of W's and Z's. We examine all SU(2)L(circle times)U(1)Y chiral operators of order p4 that lead to new four-gauge-boson interactions but do not alter trilinear vertices. We show that the eγ and γγ modes are able not only to establish the existence of a strongly interacting symmetry breaking sector but also to probe for anomalous quartic couplings of the order of 10-2 at 90% C.L. Moreover, the information gathered in the eγ mode can be used to reduce the ambiguities of the e+e- mode