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Flavourful Z′ portal for vector-like neutrino dark matter and RK(*)

Flavourful Z′ portal for vector-like neutrino dark matter and RK(*)
Flavourful Z′ portal for vector-like neutrino dark matter and RK(*)

We discuss a flavourful Z′ portal model with a coupling to fourth-family singlet Dirac neutrino dark matter. In the absence of mixing, the Z′ is fermiophobic, having no couplings to the three chiral families, but does couple to a fourth vector-like family. Due to mixing effects, the Z′ gets induced couplings to second family left-handed lepton doublets and third family left-handed quark doublets. This model can simultaneously account for the measured B-decay ratios RK and RK* and for the observed relic abundance of dark matter. We identify the parameter space where this explanation is consistent with existing experimental constraints from dark matter direct and indirect detection, LHC searches, and precision measurements of flavour mixing and neutrino processes.

Beyond Standard Model, Cosmology of Theories beyond the SM, Gauge Symmetry
1126-6708
Falkowski, Adam
6142291a-76ab-4f12-9f8f-1fd4488eae83
King, Stephen F.
f8c616b7-0336-4046-a943-700af83a1538
Perdomo, Elena
a2528448-0f53-4f0e-8c7b-4d75666adb93
Pierre, Mathias
73604d12-6a98-42a3-b917-110f48c84b0e
Falkowski, Adam
6142291a-76ab-4f12-9f8f-1fd4488eae83
King, Stephen F.
f8c616b7-0336-4046-a943-700af83a1538
Perdomo, Elena
a2528448-0f53-4f0e-8c7b-4d75666adb93
Pierre, Mathias
73604d12-6a98-42a3-b917-110f48c84b0e

Falkowski, Adam, King, Stephen F., Perdomo, Elena and Pierre, Mathias (2018) Flavourful Z′ portal for vector-like neutrino dark matter and RK(*). Journal of High Energy Physics, 2018 (8), [61]. (doi:10.1007/JHEP08(2018)061).

Record type: Article

Abstract

We discuss a flavourful Z′ portal model with a coupling to fourth-family singlet Dirac neutrino dark matter. In the absence of mixing, the Z′ is fermiophobic, having no couplings to the three chiral families, but does couple to a fourth vector-like family. Due to mixing effects, the Z′ gets induced couplings to second family left-handed lepton doublets and third family left-handed quark doublets. This model can simultaneously account for the measured B-decay ratios RK and RK* and for the observed relic abundance of dark matter. We identify the parameter space where this explanation is consistent with existing experimental constraints from dark matter direct and indirect detection, LHC searches, and precision measurements of flavour mixing and neutrino processes.

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Accepted/In Press date: 3 August 2018
e-pub ahead of print date: 13 August 2018
Published date: August 2018
Keywords: Beyond Standard Model, Cosmology of Theories beyond the SM, Gauge Symmetry

Identifiers

Local EPrints ID: 424473
URI: http://eprints.soton.ac.uk/id/eprint/424473
ISSN: 1126-6708
PURE UUID: fbde7a5f-2de3-4705-a468-a07c6ee86b39

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Date deposited: 05 Oct 2018 11:37
Last modified: 07 Oct 2020 00:35

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