Using full simulation, the CEPC baseline detector reconstructs isolated photons with over 99% efficiency and purity above 1 GeV, reaching a 2.2% H to gamma gamma mass resolution after a geometry-based correction.
Exploring Fermionic Dark Matter via Higgs Boson Precision Measurements at the Circular Electron Positron Collider
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abstract
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 $e^+e^-\to Zh$ 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.
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physics.ins-det 1years
2019 1verdicts
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Photon Reconstruction Performance at the CEPC baseline detector
Using full simulation, the CEPC baseline detector reconstructs isolated photons with over 99% efficiency and purity above 1 GeV, reaching a 2.2% H to gamma gamma mass resolution after a geometry-based correction.