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Search for dark matter in events with a Z boson and missing transverse momentum in pp collisions at root s=8 TeV with the ATLAS detector
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.
Vise andre og tillknytning
Rekke forfattare: 28942014 (engelsk)Inngår i: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 90, nr 1, s. 012004-Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A search is presented for production of dark-matter particles recoiling against a leptonically decaying Z boson in 20.3 fb(-1) of pp collisions at root s = 8 TeV with the ATLAS detector at the Large Hadron Collider. Events with large missing transverse momentum and two oppositely charged electrons or muons consistent with the decay of a Z boson are analyzed. No excess above the Standard Model prediction is observed. Limits are set on the mass scale of the contact interaction as a function of the dark-matter particle mass using an effective field theory description of the interaction of dark matter with quarks or with Z bosons. Limits are also set on the coupling and mediator mass of a model in which the interaction is mediated by a scalar particle.

sted, utgiver, år, opplag, sider
2014. Vol. 90, nr 1, s. 012004-
Emneord [en]
Constraints, LHC
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-149304DOI: 10.1103/PhysRevD.90.012004ISI: 000339169600002Scopus ID: 2-s2.0-84904290196OAI: oai:DiVA.org:kth-149304DiVA, id: diva2:738906
Forskningsfinansiär
EU, European Research Council
Merknad

QC 20140819

Tilgjengelig fra: 2014-08-19 Laget: 2014-08-19 Sist oppdatert: 2017-12-05bibliografisk kontrollert

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Strandberg, Jonas

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