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arXiv 0806.1760hep-ph
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标准模型中γ-γ \to \ell^+ \ell^- + ν(\ell =μ,e)中光子极化的电荷不对称性

Charge asymmetries in γγ\to \ell^+\ell^-+ ν's (\ell=μ, e) with polarized photons in the Standard Model

D. A. Anipko, M. Cannoni, I. F. Ginzburg, K. A. Kanishev, A. V. Pak, O. Panella

摘要:

结果表明,在\sqrt{s} >200 GeV的γγ \to \ell^+ \ell^- +ν反应中,正负电荷轻子的分布出现了很大的、可观察到的差异(\ell =μ^ \pm,e^ \pm)(电荷不对称性).考虑了γγ \to W^ \pm \ell^\ mp + ν反应中由于中间体τ轻子级联过程的贡献而引起的修正。在未来国际直线对撞机的光子对撞机模式的预期亮度下,这种电荷不对称性可能对超出标准模型的物理效应敏感。

英文摘要:

It is shown that in reaction γγ\to\ell^+\ell^-+ν'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=μ^\pm, e^\pm), (charge asymmetry). The modification due to the contribution of the cascade processes with intermediate τ-lepton in γγ\to W^\pm\ell^\mp + ν'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.

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