A calculation for Br(Z' → tth) in a B-L model

Abstract

Models with extra gauge bosons often requires an extended Higgs sector, with properties that deviate from the Standard Model (SM) case. These modifications would affect the strength of the signals that are used to search for the Higgs spectrum at present and future colliders. However, it is also possible that new signals could arise in these models. In particular, the existence of such new gauge bosons could also be used to provide new production mechanisms. In this paper we will study a useful decay for a new gauge boson, Z', with SM-like couplings, namely Z' → ff̄h, through its branching ratio. We conceive this process as a higgsses possible source, steaming from the fact that the LHC is going to be a natural source of new gauge neutral bosons, in the case nature agrees with us about its existence. We found a corresponding branching ratio of order 10−3, under certain scenaries. In particular we have used mh = 125 GeV as the last results.