Searching for a dark matter coupling to the Standard Model with a Stueckelberg extension

preprint2012arXivOpen access

Abstract

We investigate a double extension to the Standard Model (SM). A first extension introduces, via minimal coupling, a massive Z′Z' boson. This enlarged SM is coupled to a dark matter sector through the Stueckelberg mechanism by a A′A' boson. However, the A′A' boson does not interact directly with the SM fermions. In our study, we found that the A′A' is a massless photon-like particle in dark sector. Constraints on the mass for Z′Z' and corrections to ZZ mass are obtained.

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