Search for scalar top quark pair production in natural gauge mediated supersymmetry models with the ATLAS detector in pp collisions at root s=7 TeV
2012 (English)In: Physics Letters B, ISSN 0370-2693, Vol. 715, no 1-3, 44-60 p.Article in journal (Refereed) Published
The results of a search for pair production of the lighter scalar partners of top quarks () in 2.05 fb−1 of pp collisions at TeV using the ATLAS experiment at the LHC are reported. Scalar top quarks are searched for in events with two same flavour opposite-sign leptons (e,μ) with invariant mass consistent with the Z boson mass, large missing transverse momentum and jets in the final state. At least one of the jets is identified as originating from a b-quark. No excess over Standard Model expectations is found. The results are interpreted in the framework of R-parity conserving, gauge mediated Supersymmetry breaking ‘natural’ scenarios, where the neutralino () is the next-to-lightest supersymmetric particle. Scalar top quark masses up to 310 GeV are excluded for at 95% confidence level, reaching an exclusion of for . Scalar top quark masses below 240 GeV are excluded for all values of .
Place, publisher, year, edition, pages
2012. Vol. 715, no 1-3, 44-60 p.
IdentifiersURN: urn:nbn:se:uu:diva-183311DOI: 10.1016/j.physletb.2012.07.010ISI: 000308519000009OAI: oai:DiVA.org:uu-183311DiVA: diva2:562377
ATLAS Collaboration, for complete list of authors see http://dx.doi.org/10.1016/j.physletb.2012.07.0102012-10-242012-10-242012-10-24Bibliographically approved