Dark gauge bosons: LHC signatures of non-abelian kinetic mixing
Journal
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Journal Volume
728
Pages
101-107
Date Issued
2014
Author(s)
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 ϵ is determined by the ratio of the triplet vacuum expectation value, constrained to by ≲4 GeV by electroweak precision tests, to the scale Λ 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.
Type
journal article