The second Higgs at the lifetime frontier
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13130_2020_Article_13312.pdf
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Author(s)
Alipour-Fard, Samuel
Craig, Nathaniel
Gori, Stefania
Koren, Seth
Redigolo, Diego
Date Issued
July 6, 2020
Journal
Journal of High Energy Physics
Publisher
Springer Berlin Heidelberg
Citation
Alipour-Fard, Samuel et al., "The second Higgs at the lifetime frontier." Journal of High Energy Physics 2020, 7 (July 2020): no. 29 doi. 10.1007/JHEP07(2020)029 ©2020 Authors
Version
Final published version
Abstract
Abstract: We assess the current coverage and the future discovery potential of LHC searches for heavy Higgs bosons decaying into long-lived particles (LLPs), focusing primarily on the production of pairs of LLPs with hadronic final states. These signatures are generic in dark sectors where a heavy scalar decays into pairs of lighter states which subsequently mix with the Standard Model Higgs. We show that a handful of existing analyses provide broad coverage of LLP decay lengths ranging from millimeters to tens of meters, and explore the complementarity between searches for displaced and prompt final states in several simplified models. For both heavy singlet and heavy doublet scalars, LLP searches typically provide the leading sensitivity in current data and exhibit the strongest discovery potential in future LHC runs. We further translate the impact of these searches into the parameter space of various Twin Higgs models, demonstrating that LLP searches are a promising avenue for discovering a Twin Higgs with displaced decays. Finally, we propose a variety of additional search channels that would improve coverage of the second Higgs at the lifetime frontier. ©2020
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
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DOI of Published Version
https://doi.org/10.1007/JHEP07(2020)029
