Charge asymmetries in \gamma\gamma \to \ell^+\ell^-+ \nu's (\ell=\mu, e) with polarized photons in the Standard Model

Understand

It is shown that in reaction \gamma\gamma\to\ell^+\ell^-+\nu's at \sqrt{s}>200 GeV with polarized photons, large and well observable differences arise in the distribution of positive and negative charged leptons (\ell=\mu^\pm, e^\pm), (charge asymmetry).

• The modification due to the contribution of the cascade processes with intermediate \tau-lepton in \gamma \gamma \to W^\pm\ell^\mp + \nu's reaction is taken into account.
• This charge asymmetry is potentially sensitive to effects of physics beyond the standard model at the anticipated luminosity of the Photon Collider mode of the future international linear collider.