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Dark matter blind spots at one-loop

  • Tao Han
  • Hongkai Liu
  • Satyanarayan Mukhopadhyay
  • Xing WangEmail author
Open Access
Regular Article - Theoretical Physics
  • 25 Downloads

Abstract

We evaluate the impact of one-loop electroweak corrections to the spin-independent dark matter (DM) scattering cross-section with nucleons (σSI), in models with a so-called blind spot for direct detection, where the leading-order prediction for the relevant DM coupling to the Higgs boson, and therefore σSI, are vanishingly small. Adopting a simple illustrative scenario in which the DM state results from the mixing of electroweak singlet and doublet fermions, we compute the relevant higher order corrections to the scalar effective operator contributions to σSI, stemming from both triangle and box diagrams involving the SM and dark sector fields. It is observed that in a significant region of the singlet-doublet model-space, the one-loop corrections “unblind” the tree-level blind spots and lead to detectable SI scattering rates at future multi-ton scale liquid Xenon experiments, with σSI reaching values up to a few times 10−47 cm2, for a weak scale DM with \( \mathcal{O}(1) \) Yukawa couplings. Furthermore, we find that there always exists a new SI blind spot at the next-to-leading order, which is perturbatively shifted from the leading order one in the singlet-doublet mass parameters. For comparison, we also present the tree-level spin-dependent scattering cross-sections near the SI blind-spot region, that could lead to a larger signal. Our results can be mapped to the blind-spot scenario for bino-Higgsino DM in the MSSM, with other sfermions, the heavier Higgs boson, and the wino decoupled.

Keywords

Beyond Standard Model Supersymmetric Standard Model 

Notes

Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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Copyright information

© The Author(s) 2019

Authors and Affiliations

  • Tao Han
    • 1
    • 2
    • 3
  • Hongkai Liu
    • 1
  • Satyanarayan Mukhopadhyay
    • 4
  • Xing Wang
    • 1
    Email author
  1. 1.Department of Physics and AstronomyUniversity of PittsburghPittsburghU.S.A.
  2. 2.Department of PhysicsTsinghua UniversityBeijingChina
  3. 3.Collaborative Innovation Center of Quantum MatterBeijingChina
  4. 4.School of Physical Sciences, Indian Association for the Cultivation of ScienceKolkataIndia

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