Search for dark matter produced in association with a Higgs boson decaying to two bottom quarks in pp collisions at √s=8 TeV with the ATLAS detector



Aad, G, Abbott, B, Abdallah, J, Abdinov, O, Aben, R, Abolins, M, AbouZeid, OS, Abramowicz, H, Abreu, H, Abreu, R
et al (show 2863 more authors) (2016) Search for dark matter produced in association with a Higgs boson decaying to two bottom quarks in pp collisions at √s=8 TeV with the ATLAS detector PHYSICAL REVIEW D, 93 (7). 181804-. ISSN 2470-0010, 2470-0029

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Abstract

This article reports on a search for dark matter pair production in association with a Higgs boson decaying to a pair of bottom quarks, using data from 20.3 fb-1 of pp collisions at a center-of-mass energy of 8 TeV collected by the ATLAS detector at the LHC. The decay of the Higgs boson is reconstructed as a high-momentum bb 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 Standard Model backgrounds. Model-independent upper limits are placed on the visible cross sections for events with a Higgs boson decaying into bb and large missing transverse momentum with thresholds ranging from 150 to 400 GeV. Results are interpreted using a simplified model with a Z′ gauge boson decaying into different Higgs bosons predicted in a two-Higgs-doublet model, of which the heavy pseudoscalar Higgs decays into a pair of dark matter particles. Exclusion limits are also presented for the mass scales of various effective field theory operators that describe the interaction between dark matter particles and the Higgs boson.

Item Type: Article
Additional Information: 30 pages in total, author list starting page 14, 2 figures, 2 tables, published by Phys. Rev. Lett. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2016-25/
Uncontrolled Keywords: ATLAS Collaboration, ATLAS Collaboration, ATLAS Collaboration, ATLAS Collaboration
Depositing User: Symplectic Admin
Date Deposited: 14 Mar 2017 11:47
Last Modified: 24 Jun 2026 20:25
DOI: 10.1103/PhysRevD.93.072007
Open Access URL: http://journals.aps.org/prd/pdf/10.1103/PhysRevD.9...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3006377
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