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Search for scalar top quark pair production in natural gauge mediated supersymmetry models with the ATLAS detector in pp collisions at √(s)=7 TeV

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Search for scalar top quark pair production in natural gauge mediated supersymmetry models with the ATLAS detector in pp collisions at √(s)=7 TeV

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dc.contributor.author	ATLAS Collaboration
dc.contributor.author	Mitsou, Vasiliki
dc.contributor.author	Fuster Verdú, Juan A.
dc.contributor.author	Ferrer Soria, Antonio
dc.contributor.author	Castillo Giménez, María Victoria
dc.contributor.author	Cabrera Urbán, Susana
dc.contributor.author	García García, Carmen
dc.contributor.author	Higón Rodríguez, Emilio
dc.contributor.author	Martí García, Salvador
dc.contributor.author	Ros Martínez, Eduardo
dc.contributor.author	González de la Hoz, Santiago
dc.contributor.author	Salt Cairols, José
dc.contributor.author	Valls Ferrer, Juan Antonio
dc.contributor.author	Kaci, Mohammed
dc.contributor.author	Fiorini, Luca
dc.contributor.author	Hernández Jiménez, Yesenia
dc.contributor.author	Lacasta Llácer, Carlos
dc.contributor.author	Villaplana Pérez, Miguel
dc.date.accessioned	2014-06-25T08:39:00Z
dc.date.available	2014-06-25T08:39:00Z
dc.date.issued	2012
dc.identifier.citation	ATLAS Collaboration Mitsou, Vasiliki Fuster Verdú, Juan A. Ferrer Soria, Antonio Castillo Giménez, María Victoria Cabrera Urbán, Susana García García, Carmen Higón Rodríguez, Emilio Martí García, Salvador Ros Martínez, Eduardo González de la Hoz, Santiago Salt Cairols, José Valls Ferrer, Juan Antonio Kaci, Mohammed Fiorini, Luca Hernández Jiménez, Yesenia Lacasta Llácer, Carlos Villaplana Pérez, Miguel 2012 Search for scalar top quark pair production in natural gauge mediated supersymmetry models with the ATLAS detector in pp collisions at √(s)=7 TeV Physics Letters B 715 1-3 44 60
dc.identifier.uri	http://hdl.handle.net/10550/36581
dc.description.abstract	The results of a search for pair production of the lighter scalar partners of top quarks ((t) over bar (1)) in 2.05 fb(-1) of pp collisions at root s = 7 TeV using the ATLAS experiment at the LHC are reported. Scalar top quarks are searched for in events with two same flavour opposite-sign leptons (e, mu) with invariant mass consistent with the Z boson mass, large missing transverse momentum and jets in the final state. At least one of the jets is identified as originating from a b-quark. No excess over Standard Model expectations is found. The results are interpreted in the framework of R-parity conserving, gauge mediated Supersymmetry breaking 'natural' scenarios, where the neutralino ((chi) over bar (0)(1)) is the next-to-lightest supersymmetric particle. Scalar top quark masses up to 310 GeV are excluded for 115 GeV m(<(chi) over bar1)(0) 230 GeV at 95% confidence level, reaching an exclusion of m(<(t) over bar1) 330 GeV for m(<(chi) over bar1)(0) = 190 GeV. Scalar top quark masses below 240 GeV are excluded for all values of m((chi) over bar1)(0) > m(z).
dc.relation.ispartof	Physics Letters B, 2012, vol. 715, num. 1-3, p. 44-60
dc.subject	Partícules (Física nuclear)
dc.subject	Col·lisions (Física nuclear)
dc.subject	Detectors de radiació
dc.subject	Acceleradors de partícules
dc.title	Search for scalar top quark pair production in natural gauge mediated supersymmetry models with the ATLAS detector in pp collisions at √(s)=7 TeV
dc.type	journal article	es_ES
dc.date.updated	2014-06-25T08:39:00Z
dc.identifier.doi	10.1016/j.physletb.2012.07.010
dc.identifier.idgrec	083385
dc.rights.accessRights	open access	es_ES
dc.identifier.url	10.1016/j.physletb.2012.07.010