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

TL;DR

This paper demonstrates that polarized photon collisions at high energies produce observable charge asymmetries in lepton pair production, which could reveal new physics beyond the Standard Model at future colliders.

Contribution

It introduces the analysis of charge asymmetries in gamma-gamma collisions with polarized photons, including cascade processes, and explores their sensitivity to new physics beyond the Standard Model.

Findings

Large charge asymmetries are observable at 00 GeV energies.

Cascade processes with intermediate 34-leptons significantly affect asymmetry.

Potential to detect effects of physics beyond the Standard Model.

Abstract

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.