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
Number of Authors: 2894
2014 (English)In: Physical Review D, ISSN 1550-7998, Vol. 90, no 1, 012004- p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2014. Vol. 90, no 1, 012004- p.
Astronomy, Astrophysics and Cosmology
IdentifiersURN: urn:nbn:se:kth:diva-149304DOI: 10.1103/PhysRevD.90.012004ISI: 000339169600002ScopusID: 2-s2.0-84904290196OAI: oai:DiVA.org:kth-149304DiVA: diva2:738906
FunderEU, European Research Council
QC 201408192014-08-192014-08-192014-08-19Bibliographically approved