Holographic Twin Higgs Model

We present the first realization of a “twin Higgs” model as a holographic composite Higgs model. Uniquely among composite Higgs models, the Higgs potential is protected by a new standard model (SM) singlet elementary “mirror” sector at the sigma model scale $f$ and not by the composite states at $m_{\mathrm{KK}}$, naturally allowing for $m_{\mathrm{KK}}$ beyond the LHC reach. As a result, naturalness in our model cannot be constrained by the LHC, but may be probed by precision Higgs measurements at future lepton colliders, and by direct searches for Kaluza-Klein excitations at a 100 TeV collider.

Figure 1

The Higgs mass generated by the top and gauge sector. The weak dependence of the Higgs potential on $m_{\mathrm{KK}}/f$ is a unique feature of the twin Higgs approach.

Figure 2

The degree of tuning between the SM and the additional $V_s(h)$ contributions as a function of the pion scale $f$ and the ratio $(m_{\mathrm{KK}}/f)$.