ILC Workshop on Potential Experiments (ILCX2021)

Fermion pair production at e−e+ linear collider experiments in GUT inspired gauge-Higgs unification

27 Oct 2021, 15:30

20m

Room #6 (Zoom Meeting ID: 819 7353 2455)

Oral presentation using Zoom Session G: Top / Heavy flavour / QCD G: Top / Heavy flavour / QCD

Speaker

Naoki Yamatsu

Description

In gauge-Higgs unification (GHU), the 4D Higgs boson appears as a part of the fifth dimensional component of 5D gauge field. Recently, an $SO(11)$ GUT inspired $SO(5)\times U(1)\times SU(3)$ GHU model has been proposed. In the GHU, Kaluza-Klein (KK) excited states of neutral vector bosons, photon, $Z$ boson and $Z_R$ boson, appear as neutral massive vector bosons $Z^{\prime }$s. The $Z^{\prime }$ bosons in the GHU couple to quarks and leptons with large parity violation, which leads to distinctive polarization dependence in, e.g., cross sections and forward-backward asymmetries in $e^{-}{e}^{+}\to {\mu }^{-}{\mu }^{+},q\overline{q}$ processes.
In the talk, we discuss fermion pair production in $e^{-}{e}^{+}$ linear collider experiments with polarized $e^{-}$ and $e^{+}$ beams in the GUT inspired GHU. Deviations from the SM are shown in the early stage of ILC 250 GeV experiments. The deviations can be tested for the KK mass scale up to about 15 TeV.
This talk is mainly based on Phys.Rev.D102(2020)015029 collaborated with S. Funatsu, H. Hatanaka, Y. Hosotani, and Y. Orikasa.

Presentation materials

Yamatsu-ILCX2021.pdf