Dark gauge bosons: LHC signatures of non-abelian kinetic mixing
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...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2017-07-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269317303118 |
| Summary: | 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. |
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| ISSN: | 0370-2693 1873-2445 |