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Scalar electroweak multiplet dark matter

  • Wei ChaoEmail author
  • Gui-Jun Ding
  • Xiao-Gang He
  • Michael Ramsey-Musolf
Open Access
Regular Article - Theoretical Physics
  • 16 Downloads

Abstract

We revisit the theory and phenomenology of scalar electroweak multiplet thermal dark matter. We derive the most general, renormalizable scalar potential, assuming the presence of the Standard Model Higgs doublet, H, and an electroweak multiplet Φ of arbitrary SU(2)L rank and hypercharge, Y. We show that, in general, the Φ-H Higgs portal interactions depend on three, rather than two independent couplings as has been previously considered in the literature. For the phenomenologically viable case of Y = 0 multiplets, we focus on the septuplet and quintuplet cases, and consider the interplay of relic density and spin-independent direct detection cross section. We show that both the relic density and direct detection cross sections depend on a single linear combination of Higgs portal couplings, λeff. For λeff\( \mathcal{O} \)(1), present direct detection exclusion limits imply that the neutral component of a scalar electroweak multiplet would comprise a subdominant fraction of the observed DM relic density.

Keywords

Beyond Standard Model Cosmology of Theories beyond the SM Higgs Physics 

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

  • Wei Chao
    • 1
    Email author
  • Gui-Jun Ding
    • 2
  • Xiao-Gang He
    • 3
    • 4
    • 5
  • Michael Ramsey-Musolf
    • 6
    • 7
  1. 1.Center for advanced quantum studies, Department of PhysicsBeijing Normal UniversityBeijingChina
  2. 2.Interdisciplinary Center for Theoretical Study and Department of Modern PhysicsUniversity of Science and Technology of ChinaHefeiChina
  3. 3.Tsung-Dao Lee Institute, and School of Physics and AstronomyShanghai Jiao Tong UniversityShanghaiChina
  4. 4.Department of PhysicsNational Taiwan UniversityTaipeiTaiwan
  5. 5.National Center for Theoretical SciencesHsinchuTaiwan
  6. 6.Amherst Center for Fundamental InteractionsUniversity of Massachusetts-AmherstAmherstU.S.A.
  7. 7.Kellogg Radiation LaboratoryCalifornia Institute of TechnologyPasadenaU.S.A.

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