Exotic Higgs Decays
Maria Cepeda, Stefania Gori, Verena Martinez Outschoorn, and Jessie, Shelton

TL;DR
This paper reviews theoretical models and experimental searches for exotic Higgs decays into new particles, emphasizing their importance as a discovery avenue at the LHC and future colliders.
Contribution
It provides a comprehensive overview of recent theoretical developments and experimental efforts related to exotic Higgs decays, highlighting future prospects.
Findings
Current experimental searches are constraining new physics models.
High-luminosity LHC will significantly enhance discovery potential.
Future Higgs factories will improve sensitivity to exotic decay modes.
Abstract
Exotic decays of the Standard Model-like Higgs boson into beyond-the-Standard Model particles are predicted in a wide range of well-motivated theories. The enormous samples of Higgs bosons that have been and will be produced at the Large Hadron Collider thus constitute one of the key discovery opportunities at that facility, particularly in the upcoming high-statistics high-luminosity run. Here we review recent theoretical work on models that predict or accommodate exotic Higgs decays, the status of current experimental searches, and look forward to future capabilities at dedicated Higgs factories and beyond.
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