Search for a Supersymmetric Partner to the Top Quark in Final States with Jets and Missing Transverse Momentum at root s=7 TeV with the ATLAS Detector
2012 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 109, no 21, 211802- p.Article in journal (Refereed) Published
A search for direct pair production of supersymmetric top squarks ((t) over tilde (1)) is presented, assuming the (t) over tilde (1) decays into a top quark and the lightest supersymmetric particle, (chi) over tilde (0)(1), and that both top quarks decay to purely hadronic final states. A total of 16 (4) events are observed compared to a predicted standard model background of 13.5(-3.6)(+3.7) (4.4(-1.3)(+1.7)) events in two signal regions based on integral Ldt = 4.7 fb(-1) of pp collision data taken at root s = 7 TeV with the ATLAS detector at the LHC. An exclusion region in the (t) over tilde (1) versus (chi) over tilde (0)(1) mass plane is evaluated: 370 < m(<(t)over tilde>1) < 465 GeV is excluded for m(<(chi)over tilde>10) similar to 0 GeV while m((t) over tilde1) = 445 GeV is excluded for m((chi) over tilde 10) <= 50 GeV.
Place, publisher, year, edition, pages
2012. Vol. 109, no 21, 211802- p.
IdentifiersURN: urn:nbn:se:su:diva-84653DOI: 10.1103/PhysRevLett.109.211802ISI: 000311284200002OAI: oai:DiVA.org:su-84653DiVA: diva2:581097