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Search for Graviton Resonances of Extra Dimension Models at the LHC

A search for new exotic particles decaying to VZ was performed, where Vis either a W or a Z boson decaying hadronically into two overlapping jets andthe Z decays into a pair of electrons or muons. The analysis uses a data sampleof proton-proton collisions corresponding to an integrated luminosity of...

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Autor principal: De Almeida Dias, Flavia
Lenguaje:eng
Publicado: 2013
Materias:
Acceso en línea:http://cds.cern.ch/record/1525927
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author De Almeida Dias, Flavia
author_facet De Almeida Dias, Flavia
author_sort De Almeida Dias, Flavia
collection CERN
description A search for new exotic particles decaying to VZ was performed, where Vis either a W or a Z boson decaying hadronically into two overlapping jets andthe Z decays into a pair of electrons or muons. The analysis uses a data sampleof proton-proton collisions corresponding to an integrated luminosity of 5 fb−1collected by the Compact Muon Solenoid experiment at the Large Hadron Colliderat a center-of-mass energy of 7 TeV in 2011. No significant excess was observedin the mass distribution of the VZ candidates compared with the backgroundexpectation from Standard Model processes. Therefore, upper limits at the 95%confidence level were set on the product of the cross section times the branchingfraction of hypothetical particles decaying to the VZ final state, as a function ofthe mass, in two benchmark models. In the Randall-Sundrum model for graviton resonances with k / M Pl = 0.05, masses between 750 and 924 GeV/c2 wereexcluded. Sequential Standard Model W bosons with masses between 700 and929 GeV/c2 were also excluded. These are the first results from the LHC on VZsearches using final states with a boosted massive jet and a lepton pair.
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language eng
publishDate 2013
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spelling cern-15259272019-09-30T06:29:59Zhttp://cds.cern.ch/record/1525927engDe Almeida Dias, FlaviaSearch for Graviton Resonances of Extra Dimension Models at the LHCDetectors and Experimental TechniquesA search for new exotic particles decaying to VZ was performed, where Vis either a W or a Z boson decaying hadronically into two overlapping jets andthe Z decays into a pair of electrons or muons. The analysis uses a data sampleof proton-proton collisions corresponding to an integrated luminosity of 5 fb−1collected by the Compact Muon Solenoid experiment at the Large Hadron Colliderat a center-of-mass energy of 7 TeV in 2011. No significant excess was observedin the mass distribution of the VZ candidates compared with the backgroundexpectation from Standard Model processes. Therefore, upper limits at the 95%confidence level were set on the product of the cross section times the branchingfraction of hypothetical particles decaying to the VZ final state, as a function ofthe mass, in two benchmark models. In the Randall-Sundrum model for graviton resonances with k / M Pl = 0.05, masses between 750 and 924 GeV/c2 wereexcluded. Sequential Standard Model W bosons with masses between 700 and929 GeV/c2 were also excluded. These are the first results from the LHC on VZsearches using final states with a boosted massive jet and a lepton pair.CERN-THESIS-2012-276CMS-TS-2013-007oai:cds.cern.ch:15259272013-03-12T08:46:15Z
spellingShingle Detectors and Experimental Techniques
De Almeida Dias, Flavia
Search for Graviton Resonances of Extra Dimension Models at the LHC
title Search for Graviton Resonances of Extra Dimension Models at the LHC
title_full Search for Graviton Resonances of Extra Dimension Models at the LHC
title_fullStr Search for Graviton Resonances of Extra Dimension Models at the LHC
title_full_unstemmed Search for Graviton Resonances of Extra Dimension Models at the LHC
title_short Search for Graviton Resonances of Extra Dimension Models at the LHC
title_sort search for graviton resonances of extra dimension models at the lhc
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/1525927
work_keys_str_mv AT dealmeidadiasflavia searchforgravitonresonancesofextradimensionmodelsatthelhc