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arXiv · 1904.05105

Combination of searches for invisible Higgs boson decays with the ATLAS experiment

ATLAS Collaboration
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Abstract

Dark matter particles, if sufficiently light, may be produced in decays of the Higgs boson. This Letter presents a statistical combination of searches for $H\to\textrm{invisible}$ decays where $H$ is produced according to the Standard Model via vector boson fusion, $Z(\ell\ell)H$, and $W\!/\!Z(\textrm{had})H$, all performed with the ATLAS detector using 36.1 fb$^{-1}$ of $pp$ collisions at a center-of-mass energy of $\sqrt s = 13$ TeV at the LHC. In combination with the results at $\sqrt s = 7$ and 8 TeV, an exclusion limit on the $H\to\textrm{invisible}$ branching ratio of $0.26 (0.17^{+0.07}_{-0.05})$ at 95% confidence level is observed (expected).

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ATLAS Collaboration. 2019-04-10. Combination of searches for invisible Higgs boson decays with the ATLAS experiment. https://doi.org/10.1103/physrevlett.122.231801

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