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This paper studies the utility of the processes $\gamma \gamma \to \gamma\gamma$, $\gamma Z$, and $ZZ$ in searching for sources of CP violation arisingfrom energy scales beyond the production thresholds of planned futurecolliders. In the context of an effective Lagrangian approach we consider themost general set of CP odd SU(2) $\times$ U(1) operators that give rise togenuinely quartic gauge boson couplings which can be probed in $2 \to 2$scattering processes at a $\gamma \gamma $ collider. We study each process indetail, emphasizing the complementary information that is obtained by varyingthe initial beam polarizations. Finally, we compare our results to otherconstraints in the literature on CP odd gauge boson interactions and quarticgauge boson couplings; the search reaches obtained here are typically strongerand nicely complement previous studies which have focused primarily on $W$boson, top quark, or Higgs production.Comment: 42 pages, 16 ps file

physical review. d. particles, fields, gravitation, and cosmology/physical review. d. particles and fields

Indirect signatures of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>CP</mml:mi></mml:math>violation in the processes<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>γ</mml:mi><mml:mrow><mml:mrow><mml:mover><mml:mrow><mml:mi>γ</mml:mi></mml:mrow><mml:mrow><mml:mo>→</mml:mo></mml:mrow></mml:mover></mml:mrow></mml:mrow><mml:mi>γ</mml:mi><mml:mi>γ</mml:mi><mml:mo>,</mml:mo><mml:mi> </mml:mi><mml:mi>γ</mml:mi><mml:mi>Z</mml:mi><mml…

Indirect signatures ofCPviolation in the processesγγ→γγ, γZ