Abstract
The results of a search for supersymmetry in events with large missing transverse momentum and heavy-flavor jets using an integrated luminosity corresponding to 2.05 fb−1 of pp collisions at s=7 TeV recorded with the ATLAS detector at the Large Hadron Collider are reported. No significant excess is observed with respect to the prediction for standard model processes. Results are interpreted in a variety of R-parity conserving models in which scalar bottoms and tops are the only scalar quarks to appear in the gluino decay cascade, and in an SO(10) model framework. Gluino masses up to 600–900 GeV are excluded, depending on the model considered.4 MoreReceived 28 March 2012DOI:https://doi.org/10.1103/PhysRevD.85.112006This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.© 2012 CERN, for the ATLAS Collaboration
Highlights
Supersymmetry (SUSY) [1,2,3,4,5,6,7,8,9] is a framework that provides an extension of the standard model (SM) and naturally resolves the hierarchy problem [10,11,12,13] by introducing supersymmetric partners of the known bosons and fermions
Results are interpreted in the framework of various simplified models in which scalar bottoms and tops are the only squarks that appear in the gluino decay cascade, and in specific grand unification theories (GUTs) based on the gauge group SO(10) [19,20]
This effect is included in the simulation, and Monte Carlo (MC) events are reweighted to reproduce the mean expected number of collisions per bunch crossing estimated for data
Summary
Supersymmetry (SUSY) [1,2,3,4,5,6,7,8,9] is a framework that provides an extension of the standard model (SM) and naturally resolves the hierarchy problem [10,11,12,13] by introducing supersymmetric partners of the known bosons and fermions. The colored superpartners of quarks and gluons, the squarks (q~) and gluinos (g~), are expected to be produced in strong interaction processes at the center-of-mass energy of the Large Hadron Collider (LHC). Their decays via cascades ending with the LSP would produce striking experimental signatures. Results are interpreted in the framework of various simplified models in which scalar bottoms and tops are the only squarks that appear in the gluino decay cascade, and in specific grand unification theories (GUTs) based on the gauge group SO(10) [19,20]. Searches sensitive to direct scalar bottom production irrespective of gluino mass have been published by the ATLAS Collaboration [23] using the same data set employed in this paper
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