CERN Accelerating science

ATLAS Note
Report number	ATLAS-CONF-2013-024
Title	Search for direct production of the top squark in the all-hadronic ttbar + etmiss final state in 21 fb-1 of p-pcollisions at sqrt(s)=8 TeV with the ATLAS detector
Corporate Author(s)	The ATLAS collaboration
Collaboration	ATLAS Collaboration
Publication	2013
Imprint	11 Mar 2013
Number of pages	17
Note	All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/CONFNOTES/ATLAS-CONF-2013-024
In:	48th Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, Italy, 9 - 16 Mar 2013
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	SUSY ; Top Squark ; Scalar top ; All-hadronic top
Abstract	The results of a search for direct pair production of scalar partners of the top quark in 20.5 fb-1 of pp collisions at sqrt(s)=8 TeV using the ATLAS detector at the LHC are reported. The top squarks are assumed to decay exclusively into a top quark and the lightest supersymmetric particle. The search is conducted in events with large missing transverse momentum and six or more jets, targeting the fully-hadronic top final state. Results are interpreted in a R-parity conserving minimal supersymmetric scenario of direct top squark pair production. Top squarks in this model with masses between 320 and 660 GeV are excluded at 95% CL for a nearly massless LSP. For a LSP mass of 150 GeV the exclusion interval is between 400 and 620 GeV. The result significantly extends previous limits in the all-hadronic final state and excludes top squarks up to higher masses than in previous searches.
Copyright/License	Preprint: (License: CC-BY-4.0)

Corresponding record in: Inspire