Restrictions on the mass of the KK excitation W′ from the Higgs boson diphoton decay and the single top production.

Abstract

In the framework of stabilized brane-world models we consider the contribution of the W′ boson and the rest of the W boson KK tower to the Higgs boson decay to two photons and to the single top production process. Comparing the signal strengths calculated in this approach with the experimental ones obtained at the LHC and taking into account the expected improvements at future high luminosity HL-LHC, high energy HE-LHC, and FCC-hh projects, we get predictions for the limits on the W' boson mass depending on its coupling to SM fermions.