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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
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0001-5650-4556
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-1921-6173
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0003-3867-0336
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Number of Authors: 28902012 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 109, no 21, p. 211802-Article in journal (Refereed) Published
Abstract [en]

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, p. 211802-
Keywords [en]
Scalar Top, Supergauge Transformations, P(P)Over-Bar Collisions, E(+)E(-) Collisions, Pair Production, Leptons, Models, Generators, Particle, Currents
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-109512DOI: 10.1103/PhysRevLett.109.211802ISI: 000311284200002PubMedID: 23215587Scopus ID: 2-s2.0-84870180692OAI: oai:DiVA.org:kth-109512DiVA, id: diva2:582977
Funder
Swedish Research Council
Note

QC 20130107. Author count: 2890

Available from: 2013-01-07 Created: 2013-01-07 Last updated: 2024-03-15Bibliographically approved

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Jovicevic, JelenaKuwertz, EmmaLund-Jensen, BengtStrandberg, Jonas

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