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

2015-02-24Journal article Open access
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dc.contributor.authorATLAS collaboration (2890 authors)
dc.contributor.authorAguilar-Saavedra, Juan Antonio
dc.contributor.authorAmor Dos Santos, Susana Patricia
dc.contributor.authorAnjos, Nuno
dc.contributor.authorAraque, Juan Pedro
dc.contributor.authorCantrill, Robert
dc.contributor.authorCarvalho, João
dc.contributor.authorCastro, Nuno Filipe
dc.contributor.authorConde Muiño, Patricia
dc.contributor.authorDa Cunha Sargedas De Sousa, Mario Jose
dc.contributor.authorFiolhais, Miguel
dc.contributor.authorGalhardo, Bruno
dc.contributor.authorGomes, Agostinho
dc.contributor.authorGonçalo, Ricardo
dc.contributor.authorJorge, Pedro
dc.contributor.authorLopes, Lourenco
dc.contributor.authorMachado Miguens, Joana
dc.contributor.authorMaio, Amélia
dc.contributor.authorManeira, José
dc.contributor.authorOnofre, António
dc.contributor.authorPalma, Alberto
dc.contributor.authorPedro, Rute
dc.contributor.authorPina, João Antonio
dc.contributor.authorPinto, Belmiro
dc.contributor.authorSantos, Helena
dc.contributor.authorSaraiva, João
dc.contributor.authorSilva, José
dc.contributor.authorTavares Delgado, Ademar
dc.contributor.authorVeloso, Filipe
dc.contributor.authorWolters, Helmut
dc.date.accessioned2019-02-04T05:10:47Z
dc.date.available2019-02-04T05:10:47Z
dc.date.issued2015-02-24
dc.date.updated2019-02-04T05:10:47Z
dc.description.abstractThis 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.
dc.description.versionPeer Reviewed
dc.identifierEur.Phys.J. C75 (2015) 92; DOI 10.1140/epjc/s10052-015-3306-z
dc.identifier.urihttp://dx.doi.org/10.1140/epjc/s10052-015-3306-z
dc.identifier.urihttp://hdl.handle.net/10400.26/26705
dc.language.isoeng
dc.titleSearch for dark matter in events with heavy quarks and missing transverse momentum in $pp$ collisions with the ATLAS detector
dc.typejournal article
dspace.entity.typePublication
rcaap.rightsopenAccesspt
rcaap.typearticle

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