Signatures of CP-violation in $\gamma \gamma \to H$ using polarized beams

Abstract

The possibility of observing CP-violation in the process $\gamma \gamma \to H$ is investigated for masses of the Higgs particle in the interval $M_z\text{lsim}{m}_H\text{lsim}2m_t$, using a 0.5TeV tunable linear $e^{+}{e}^{-}$ collider through laser backscattering. The use of polarized beams allows the formation of two different asymmetries sensitive to CP-violating New Physics (NP) interactions among the gauge and Higgs bosons. It is shown that very low values of the corresponding NP couplings can be probed, for a large range of the Higgs mass.

Comments: 23 pages including 6 figures. Version to appear in Phys. Rev. D