paper

Dark Gauge Bosons: LHC Signatures of Non-Abelian Kinetic Mixing

arXiv:1604.00044 · doi:10.1016/j.physletb.2017.04.037

Abstract

We consider non-abelian kinetic mixing between the Standard Model SU(2 $)_{L}$ and a dark sector U(1 $)^{'}$ gauge group associated with the presence of a scalar SU(2 $)_{L}$ triplet. The magnitude of the resulting dark photon coupling $I^µ$ is determined by the ratio of the triplet vacuum expectation value, constrained to by $\lsim 4$ GeV by electroweak precision tests, to the scale $I^$ of the effective theory. The corresponding effective operator Wilson coefficient can be $O (1)$ while accommodating null results for dark photon searches, allowing for a distinctive LHC dark photon phenomenology. After outlining the possible LHC signatures, we illustrate by recasting current ATLAS dark photon results into the non-abelian mixing context.

12 pages, 5 figures