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

(ATLAS Collaboration), K. Cranmer, A. Haas, A. I. Mincer, P. Nemethy

Research output: Contribution to journalArticle

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.

Original languageEnglish (US)
Article number072007
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume93
Issue number7
DOIs
StatePublished - Apr 18 2016

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Higgs bosons
dark matter
quarks
collisions
detectors
radii
decay
pair production
substructures
exclusion
transverse momentum
center of mass
bosons
momentum
operators
thresholds
cross sections
interactions
energy

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

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. / (ATLAS Collaboration); Cranmer, K.; Haas, A.; Mincer, A. I.; Nemethy, P.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 93, No. 7, 072007, 18.04.2016.

Research output: Contribution to journalArticle

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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.",
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