Autor(es):
Onofre, A. ; Castro, Nuno Filipe Silva Fernandes ; ATLAS Collaboration
Data: 2011
Identificador Persistente: http://hdl.handle.net/1822/48765
Origem: RepositóriUM - Universidade do Minho
Projeto/bolsa:
info:eu-repo/grantAgreement/FCT/3599-PPCDT/143069/PT
;
info:eu-repo/grantAgreement/EC/FP7/246806/EU;
Assunto(s): Grand unified theory; Narrow resonance; New gauge boson; Z′Z′; Dilepton; Mass spectrum; Z '; Science & Technology; Ciências Naturais::Ciências Físicas; Ciências Naturais::Ciências Físicas
Descrição
This Letter presents a search for high mass e+e−e+e− or μ+μ−μ+μ− resonances in pp collisions at View the MathML sources=7 TeV at the LHC. The data were recorded by the ATLAS experiment during 2010 and correspond to a total integrated luminosity of ∼40 pb−1∼40 pb−1. No statistically significant excess above the Standard Model expectation is observed in the search region of dilepton invariant mass above 110 GeV. Upper limits at the 95% confidence level are set on the cross section times branching ratio of Z′Z′ resonances decaying to dielectrons and dimuons as a function of the resonance mass. A lower mass limit of 1.048 TeV on the Sequential Standard Model Z′Z′ boson is derived, as well as mass limits on Z⁎Z⁎ and E6E6-motivated Z′Z′ models.
We acknowledge the support of ANPCyT, Argentina; YerPhl, Armenia; ARC, Australia; BMWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CONICYT, Chile; CAS, MOST and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF, DNSRC and Lundbeck Foundation, Denmark; ARTEMIS, European Union; IN2P3-CNRS, CEA-DSM/IRFU, France; GNAS, Georgia; BMBF, DFG, HGF, MPG and AvH Foundation, Germany; GSRT, Greece; ISF, MINERVA, GIF, DIP and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; FOM and NWO, Netherlands; RCN, Norway; MNiSW, Poland; GRICES and FCT, Portugal; MERYS (MECTS), Romania; MES of Russia and ROSATOM, Russian Federation; JINR; MSTD, Serbia; MSSR, Slovakia; ARRS and MVZT, Slovenia; DST/NRF, South Africa; MICINN, Spain; SRC and Wallenberg Foundation, Sweden; SER, SNSF and Cantons of Bern and Geneva, Switzerland; NSC, Taiwan; TAEK, Turkey; STFC, the Royal Society and Leverhulme Trust, United Kingdom; DOE and NSF, United States of America.
info:eu-repo/semantics/publishedVersion
