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Partially (in)visible Higgs decays at the LHC
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Partially (in)visible Higgs decays at the LHC
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Both Atlas and CMS have reported a discovery of a Standard Model-like Higgs boson $H$ of mass around 125 GeV. Consistency with the Standard Model implies the non-observation of non-SM like decay modes of the newly discovered particle. Sensitivity to such decay modes, especially when they involve partially invisible final states is currently beyond scrutiny of the LHC. We systematically study such decay channels in the form of $H\rightarrow AA\rightarrow jets+missing energy$, with $A$ a light scalar or scalar, and analyze to what extent these exotic branching fractions can be constrained by direct measurements at the LHC. While the analysis is challenging, constraints as good as ${BR}\lesssim 10%$ can be obtained.
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Cited by 1 Pith paper
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Semi-visible higgs decay as a probe for new invisible particles
At the HL-LHC, semi-visible Higgs decays can probe dark-SMEFT couplings to invisible scalars or fermions below 50 GeV, with the best reach for Yukawa-type operators, while invisible Z decays and unitarity constrain de...
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