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Search for dark matter in association with a Higgs boson decaying to $b$-quarks in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector

Abstract : A search for dark matter pair production in association with a Higgs boson decaying to a pair of bottom quarks is presented, using 3.2 $fb^{-1}$ of $pp$ collisions at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the LHC. The decay of the Higgs boson is reconstructed as a high-momentum $b\bar{b}$ system with either a pair of small-radius jets, or a single large-radius jet with substructure. The observed data are found to be consistent with the expected backgrounds. Results are interpreted using a simplified model with a $Z'$ gauge boson mediating the interaction between dark matter and the Standard Model as well as a two-Higgs-doublet model containing an additional $Z'$ boson which decays to a Standard Model Higgs boson and a new pseudoscalar Higgs boson, the latter decaying into a pair of dark matter particles.
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http://hal.in2p3.fr/in2p3-01375528
Contributor : Claudine Bombar <>
Submitted on : Monday, October 3, 2016 - 11:42:26 AM
Last modification on : Thursday, November 26, 2020 - 3:39:06 PM

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M. Aaboud, Z. Barnovska-Blenessy, N. Berger, M. Delmastro, L. Di Ciaccio, et al.. Search for dark matter in association with a Higgs boson decaying to $b$-quarks in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector. Physics Letters B, Elsevier, 2017, 765, pp.11-31. ⟨10.1016/j.physletb.2016.11.035⟩. ⟨in2p3-01375528⟩

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