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Search for high mass dilepton resonances in pp collisions at √s=7 TeV with the ATLAS experiment

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Search for high mass dilepton resonances in pp collisions at √s=7 TeV with the ATLAS experiment

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Title: Search for high mass dilepton resonances in pp collisions at √s=7 TeV with the ATLAS experiment
Author: Aad, G.; Barreiro, Fernando; Cantero, J.; De la Torre, H.; Del Peso, J.; Glasman, C.; Labarga, Luis; Lagouri, T.; March, Luis; Nebot, Eduardo; Rodier, Stephane; Terrón, J.
Entity: UAM. Departamento de Física Teórica
UAM Author: Lagouri , Theodota ; Labarga Echeverría, Luis Alfonso ; March Ruiz, Luis ; Nebot Del Busto, Eduardo ; Barreiro Alonso, Fernando ; Rodier , Stephane
Publisher: CERN; Elsevier B.V.
Date: 2011-06-13
Citation: Physics Letters B 700.3-4 (2011): 163-180
ISSN: 0370-2693 (print); 1873-2445 (online)
DOI: 10.1016/j.physletb.2011.04.044
Funded by: We wish to thank CERN for the efficient commissioning and operation of the LHC during this initial high-energy data-taking period as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of ANPCyT, Argentina; YerPhI, 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. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN and the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (UK) and BNL (USA) and in the Tier-2 facilities worldwide
Project: info:eu-repo/grantAgreement/EC/FP7/303482
Editor's Version: http://dx.doi.org/10.1016/j.physletb.2011.04.044
Subjects: Dilepton; Grand unified theory; Mass spectrum; Narrow resonance; New gauge boson; Z'; Física
URI: http://hdl.handle.net/10486/675097
Note: Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAM
Rights: © 2011 CERN

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Esta obra está bajo una licencia de Creative Commons Reconocimiento-NoComercial-SinObraDerivada 4.0 Internacional.

Abstract:

This Letter presents a search for high mass e+e- or μ+μ- resonances in pp collisions at √s=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. 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' 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' boson is derived, as well as mass limits on Z* and E6-motivated Z' models

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Citations
G o o g l e ™ Scholar: Aad, G. - Barreiro, Fernando - Cantero, J. - De la Torre, H. - Del Peso, J. - Glasman, C. - Labarga, Luis - Lagouri, T. - March, Luis - Nebot, Eduardo - Rodier, Stephane - Terrón, J.

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