Exploring fermionic dark matter via Higgs boson precision measurements at the Circular Electron Positron Collider

We study the impact of fermionic dark matter (DM) on projected Higgs precision measurements at the Circular Electron Positron Collider (CEPC), including the one-loop effects on the e+e−→Zh cross section and the Higgs boson diphoton decay, as well as the tree-level effects on the Higgs boson invisibl...

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Bibliographic Details
Published in:Physical review. D 2018-03, Vol.97 (5), Article 055004
Main Authors: Xiang, Qian-Fei, Bi, Xiao-Jun, Yin, Peng-Fei, Yu, Zhao-Huan
Format: Article
Language:English
Subjects:
Constraint modelling
Couplings
Dark matter
Decay
Electron-positron accelerators
Electroweak model
Higgs bosons
Quarks
Superconducting supercolliders
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Summary:We study the impact of fermionic dark matter (DM) on projected Higgs precision measurements at the Circular Electron Positron Collider (CEPC), including the one-loop effects on the e+e−→Zh cross section and the Higgs boson diphoton decay, as well as the tree-level effects on the Higgs boson invisible decay. As illuminating examples, we discuss two UV-complete DM models, whose dark sector contains electroweak multiplets that interact with the Higgs boson via Yukawa couplings. The CEPC sensitivity to these models and current constraints from DM detection and collider experiments are investigated. We find that there exist some parameter regions where the Higgs measurements at the CEPC will be complementary to current DM searches.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.97.055004