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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.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
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Number of Authors: 2890
2012 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 109, no 21, 211802- p.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, 211802- p.
Keyword [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: 000311284200002Scopus ID: 2-s2.0-84870180692OAI: oai:DiVA.org:kth-109512DiVA: diva2:582977
Funder
Swedish Research Council
Note

QC 20130107. Author count: 2890

Available from: 2013-01-07 Created: 2013-01-07 Last updated: 2017-12-06Bibliographically approved

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