Exposing the dark sector with future Z factories
Name
PhysRevD.97.095044.pdf
Size
4.01 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Liu, Jia
Wang, Lian-Tao
Wang, Xiao-Ping
Xue, Wei
Date Issued
May 2018
Journal
Physical Review D
Publisher
American Physical Society
Citation
Liu, Jia et al. "Exposing the dark sector with future Z factories." Physical Review D 97, 9 (May 2018): 095044
Version
Final published version
Abstract
We investigate the prospects of searching dark sector models via exotic Z-boson decay at future e⁺e⁻ colliders with Giga Z and Tera Z options. Four general categories of dark sector models, Higgs portal dark matter, vector-portal dark matter, inelastic dark matter, and axionlike particles, are considered. Focusing on channels motivated by the dark sector models, we carry out a model-independent study of the sensitivities of Z factories in probing exotic decays. The limits on branching ratios of the exotic Z decay are typically O(10⁻⁶–10⁻[superscript 8.5]) for the Giga Z and O(10⁻[superscript 7.5]–10⁻¹¹) for the Tera Z, and they are compared with the projection for the high luminosity LHC. We demonstrate that future Z factories can provide its unique and leading sensitivity and highlight the complementarity with other experiments, including the indirect and direct dark matter search limits and the existing collider limits. Future Z factories will play a leading role in uncovering the hidden sector of the Universe in the future.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
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Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.97.095044
