Search for dark matter in events with heavy quarks and missing transverse momentum in $pp$ collisions with the ATLAS detector - INSPIRE

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Search for dark matter in events with heavy quarks and missing transverse momentum in $pp$ collisions with the ATLAS detector

ATLAS

Collaboration

Oct 15, 2014

25 pages

Published in:

Eur.Phys.J.C 75 (2015) 2, 92

Published: Feb 24, 2015

e-Print:

1410.4031 [hep-ex]

DOI:

10.1140/epjc/s10052-015-3306-z

PDG: Dark Matter Particle (

{{\mathit X}^{0}}

) Production in Hadron Collisions

Report number:

CERN-PH-EP-2014-229

Experiments:

CERN-LHC-ATLAS

View in:

reference search145 citations

Citations per year

Abstract: (Springer)

This article reports on a search for dark matter pair production in association with bottom or top quarks in

20.3 \mathrm {~fb}^{-1}

of

pp

collisions collected at

\sqrt{s} = 8

TeV by the ATLAS detector at the LHC. Events with large missing transverse momentum are selected when produced in association with high-momentum jets of which one or more are identified as jets containing

b

-quarks. Final states with top quarks are selected by requiring a high jet multiplicity and in some cases a single lepton. The data are found to be consistent with the Standard Model expectations and limits are set on the mass scale of effective field theories that describe scalar and tensor interactions between dark matter and Standard Model particles. Limits on the dark-matter–nucleon cross-section for spin-independent and spin-dependent interactions are also provided. These limits are particularly strong for low-mass dark matter. Using a simplified model, constraints are set on the mass of dark matter and of a coloured mediator suitable to explain a possible signal of annihilating dark matter.

Note:

10 pages plus author list + cover pages (25 pages total), 7 figures, 2 tables, submitted to Eur. Phys. J. C, All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2014-01/

p p: scattering
p p: colliding beams
dark matter: mass
dark matter: pair production
jet: hadroproduction
jet: multiplicity: high
transverse momentum: missing-energy
heavy quark
interaction: model
effective field theory

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