2018 # Spin portal to dark matter

**Abstract:** In this work, we study the possibility that dark matter fields transform in the ð1; 0Þ ⊕ ð0; 1Þ representation of the homogeneous Lorentz group. In an effective theory approach, we study the lowest-dimension interacting terms of dark matter with standard model fields, assuming that dark matter fields transform as singlets under the standard model gauge group. There are three dimension-four operators, two of them yielding a Higgs portal to dark matter. The third operator couples the photon and Z 0 fields to the…

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(42 citation statements)

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“…On the direct detection side, the appropriate description of XENON1T measurement of σ p [10] requires spin portal coupling g t ≤ 10 −5 for M ≈ 100 GeV to g t ≤ 10 −3 for M ≈ 1 T eV . Less stringent upper bounds are obtained for the Higgs portal coupling g s ≤ 10 −2 and no significant constraint is obtained for g p [5].…”

confidence: 92%

“…On the direct detection side, the appropriate description of XENON1T measurement of σ p [10] requires spin portal coupling g t ≤ 10 −5 for M ≈ 100 GeV to g t ≤ 10 −3 for M ≈ 1 T eV . Less stringent upper bounds are obtained for the Higgs portal coupling g s ≤ 10 −2 and no significant constraint is obtained for g p [5].…”

confidence: 92%

“…In ref. [5] we proposed an alternative (1, 0)⊕(0, 1) space-time structure for dark matter, in a formalism that generalizes the structure of spin 1/2 Dirac theory to spin-one matter particles. The corresponding quantum field theory was developed in [6] and it is based in the parity-based construction of a covariant basis for (j, 0) ⊕ (0, j) fields done in [7].…”

confidence: 99%

“…Spin one matter fields in the chiral representation (1, 0) ⊗ (0, 1) of the Lorentz group can be studied in an antisymmetric tensor (Cata and Ibarra, 2014) or a sixtor (Napsuciale et al, 2016) representation. If the field is complex, i.e., if there is a dark sector with new gauge interactions, the coupling with the Standard Model can occur via a multipole interaction (Hernández-Arellano et al, 2018). In this work we consider a singlet dark matter field.…”

confidence: 99%