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Abstract:

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.

Registro:

Documento: Artículo
Título: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
Autor:The ATLAS collaboration et al.
Este artículo contiene 2884 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 2884 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Palabras clave:Hadron-Hadron scattering; Proton-proton scattering; Supersymmetry; Top squark
Año:2014
Volumen:2014
Número:9
Página de inicio:1
Página de fin:51
DOI: http://dx.doi.org/10.1007/JHEP09(2014)015
Título revista:Journal of High Energy Physics
Título revista abreviado:J. High Energy Phys.
ISSN:11266708
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11266708_v2014_n9_p1_TheATLAScollaboration

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Citas:

---------- APA ----------
(2014) . 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. Journal of High Energy Physics, 2014(9), 1-51.
http://dx.doi.org/10.1007/JHEP09(2014)015
---------- CHICAGO ----------
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" . Journal of High Energy Physics 2014, no. 9 (2014) : 1-51.
http://dx.doi.org/10.1007/JHEP09(2014)015
---------- MLA ----------
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" . Journal of High Energy Physics, vol. 2014, no. 9, 2014, pp. 1-51.
http://dx.doi.org/10.1007/JHEP09(2014)015
---------- VANCOUVER ----------
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. J. High Energy Phys. 2014;2014(9):1-51.
http://dx.doi.org/10.1007/JHEP09(2014)015