Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at √s = 8TeV with the ATLAS detector

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The results of a search for direct pair production of the scalar partner to the top quark using an integrated luminosity of 20.1 fb -1 of proton-proton collision data at yfs = 8 TeV recorded with the ATLAS detector at the LHC are reported. The top squark is assumed to decay via t → t χ¯ 0 1 or t → b...

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Autor principal: The ATLAS collaboration
Formato: JOUR
Materias:
Hadron-Hadron scattering
Proton-proton scattering
Supersymmetry
Top squark
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_11266708_v2014_n9_p1_TheATLAScollaboration
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_11266708_v2014_n9_p1_TheATLAScollaboration
record_format dspace
spelling todo:paper_11266708_v2014_n9_p1_TheATLAScollaboration2023-10-03T16:07:14Z Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at √s = 8TeV with the ATLAS detector The ATLAS collaboration Hadron-Hadron scattering Proton-proton scattering Supersymmetry Top squark The results of a search for direct pair production of the scalar partner to the top quark using an integrated luminosity of 20.1 fb -1 of proton-proton collision data at yfs = 8 TeV recorded with the ATLAS detector at the LHC are reported. The top squark is assumed to decay via t → t χ¯ 0 1 or t → b χ 1 → bW(*)χ - 0 1 , where χ - 0 1 (x1) denotes the lightest neutralino (chargino) in supersymmetric models. The search targets a fully-hadronic final state in events with four or more jets and large missing transverse momentum. No significant excess over the Standard Model background prediction is observed, and exclusion limits are reported in terms of the top squark and neutralino masses and as a function of the branching fraction of t → t χ -0 1 . For a branching fraction of 100%, top squark masses in the range 270-645 GeV are excluded for χ -0 1 masses below 30GeV. For a branching fraction of 50% to either t → t χ -0 1 or t → b χ -0 1 , and assuming the χ¯ 1 mass to be twice the χ -0 1 mass, top squark masses in the range 250-550 GeV are excluded for χ -0 1 masses below 60 GeV. © CERN 2014. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_11266708_v2014_n9_p1_TheATLAScollaboration
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Hadron-Hadron scattering
Proton-proton scattering
Supersymmetry
Top squark
spellingShingle Hadron-Hadron scattering
Proton-proton scattering
Supersymmetry
Top squark
The ATLAS collaboration
Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at √s = 8TeV with the ATLAS detector
topic_facet Hadron-Hadron scattering
Proton-proton scattering
Supersymmetry
Top squark
description The results of a search for direct pair production of the scalar partner to the top quark using an integrated luminosity of 20.1 fb -1 of proton-proton collision data at yfs = 8 TeV recorded with the ATLAS detector at the LHC are reported. The top squark is assumed to decay via t → t χ¯ 0 1 or t → b χ 1 → bW(*)χ - 0 1 , where χ - 0 1 (x1) denotes the lightest neutralino (chargino) in supersymmetric models. The search targets a fully-hadronic final state in events with four or more jets and large missing transverse momentum. No significant excess over the Standard Model background prediction is observed, and exclusion limits are reported in terms of the top squark and neutralino masses and as a function of the branching fraction of t → t χ -0 1 . For a branching fraction of 100%, top squark masses in the range 270-645 GeV are excluded for χ -0 1 masses below 30GeV. For a branching fraction of 50% to either t → t χ -0 1 or t → b χ -0 1 , and assuming the χ¯ 1 mass to be twice the χ -0 1 mass, top squark masses in the range 250-550 GeV are excluded for χ -0 1 masses below 60 GeV. © CERN 2014.
format JOUR
author The ATLAS collaboration
author_facet The ATLAS collaboration
author_sort The ATLAS collaboration
title Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at √s = 8TeV with the ATLAS detector
title_short Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at √s = 8TeV with the ATLAS detector
title_full Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at √s = 8TeV with the ATLAS detector
title_fullStr Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at √s = 8TeV with the ATLAS detector
title_full_unstemmed Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at √s = 8TeV with the ATLAS detector
title_sort search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at √s = 8tev with the atlas detector
url http://hdl.handle.net/20.500.12110/paper_11266708_v2014_n9_p1_TheATLAScollaboration
work_keys_str_mv AT theatlascollaboration searchfordirectpairproductionofthetopsquarkinallhadronicfinalstatesinprotonprotoncollisionsats8tevwiththeatlasdetector
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