Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector

A search is presented for direct top squark pair production using events with at least two leptons including a same-flavour opposite-sign pair with invariant mass consistent with the Z boson mass, jets tagged as originating from b-quarks and missing transverse momentum. The analysis is performed wit...

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Autor principal:	Aad, G.
Formato:	JOUR
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_14346044_v74_n6_p_Aad
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_14346044_v74_n6_p_Aad
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spelling	todo:paper_14346044_v74_n6_p_Aad2023-10-03T16:14:59Z Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector Aad, G. A search is presented for direct top squark pair production using events with at least two leptons including a same-flavour opposite-sign pair with invariant mass consistent with the Z boson mass, jets tagged as originating from b-quarks and missing transverse momentum. The analysis is performed with proton–proton collision data at √s = 8 TeV collected with the ATLAS detector at the LHC in 2012 corresponding to an integrated luminosity of 20.3 fb−1. No excess beyond the Standard Model expectation is observed. Interpretations of the results are provided in models based on the direct pair production of the heavier top squark state (t<inf>2</inf>) followed by the decay to the lighter top squark state (t<inf>1</inf>) via t<inf>2</inf> → Zt<inf>1</inf>, and for t<inf>1</inf> pair production in natural gaugemediated supersymmetry breaking scenarios where the neutralino (χ <inf>01</inf>) is the next-to-lightest supersymmetric particle and decays producing a Z boson and a gravitino (G ) via the χ <inf>01</inf> → Z G process. © 2014, CERN for the benefit of the ATLAS collaboration 2014. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_14346044_v74_n6_p_Aad
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description	A search is presented for direct top squark pair production using events with at least two leptons including a same-flavour opposite-sign pair with invariant mass consistent with the Z boson mass, jets tagged as originating from b-quarks and missing transverse momentum. The analysis is performed with proton–proton collision data at √s = 8 TeV collected with the ATLAS detector at the LHC in 2012 corresponding to an integrated luminosity of 20.3 fb−1. No excess beyond the Standard Model expectation is observed. Interpretations of the results are provided in models based on the direct pair production of the heavier top squark state (t<inf>2</inf>) followed by the decay to the lighter top squark state (t<inf>1</inf>) via t<inf>2</inf> → Zt<inf>1</inf>, and for t<inf>1</inf> pair production in natural gaugemediated supersymmetry breaking scenarios where the neutralino (χ <inf>01</inf>) is the next-to-lightest supersymmetric particle and decays producing a Z boson and a gravitino (G ) via the χ <inf>01</inf> → Z G process. © 2014, CERN for the benefit of the ATLAS collaboration 2014.
format	JOUR
author	Aad, G.
spellingShingle	Aad, G. Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector
author_facet	Aad, G.
author_sort	Aad, G.
title	Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector
title_short	Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector
title_full	Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector
title_fullStr	Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector
title_full_unstemmed	Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector
title_sort	search for direct top squark pair production in events with a z boson, b-jets and missing transverse momentum in √s = 8 tev pp collisions with the atlas detector
url	http://hdl.handle.net/20.500.12110/paper_14346044_v74_n6_p_Aad
work_keys_str_mv	AT aadg searchfordirecttopsquarkpairproductionineventswithazbosonbjetsandmissingtransversemomentumins8tevppcollisionswiththeatlasdetector
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Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector

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