arXiv 1702.033962017-02hep-ph

Discriminating leptonic Yukawa interactions with doubly charged scalar at the ILC

Takaaki Nomura, Hiroshi Okada, Hiroshi Yokoya

备注：: 18 pages, 4 figures, 8 tables; accepted version for publication in Nuclear Physics B
DOI：: 10.1016/j.nuclphysb.2018.02.011

英文摘要：

We explore discrimination of two types of leptonic Yukawa interactions associated with Higgs triplet, $\bar L^c_L ΔL_L$, and with $SU(2)$ singlet doubly charged scalar, $\bar e_R^c k^{++} e_R$. These interactions can be distinguished by measuring the effects of doubly charged scalar boson exchange in the $e^+ e^- \to \ell^+ ell^-$ processes at polarized electron-positron colliders. We study a forward-backward asymmetry of scattering angular distribution to estimate the sensitivity for these effects at the ILC. In addition, we investigate prospects of upper bounds on the Yukawa couplings by combining the constraints of lepton flavor violation processes and the $e^+ e^- \to \ell^+ \ell^-$ processes at the LEP and the ILC.

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