A search for tt resonances with the ATLAS detector in 2.05 fb^(−1) of proton-proton collisions at √s =7 TeV
Abstract
A search for top quark pair resonances in final states containing at least one electron or muon has been performed with the ATLAS experiment at the CERN Large Hadron Collider. The search uses a data sample corresponding to an integrated luminosity of 2.05 fb^(−1), which was recorded in 2011 at a proton-proton centre-of-mass energy of 7 TeV. No evidence for a resonance is found and limits are set on the production cross-section times branching ratio to tt for narrow and wide resonances. For narrow Z′ bosons, the observed 95 % Bayesian credibility level limits range from 9.3 pb to 0.95 pb for masses in the range of m_(Z′)=500 GeV to m_(Z′)=1300 GeV. The corresponding excluded mass region for a leptophobic topcolour Z′ boson (Kaluza-Klein gluon excitation in the Randall-Sundrum model) is m_(Z′)<880 GeV (m_(gKK)< 1130 GeV).
Additional Information
© 2012 CERN for the benefit of the ATLAS collaboration. This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited. Received: 24 May 2012. Revised: 7 July 2012. Published online: 26 July 2012. We thank CERN for the very successful operation of the LHC, 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; EPLANET and ERC, 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 andMVZT, 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.Attached Files
Published - Aad_EurPhysJournC2012p2083.pdf
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Additional details
- Eprint ID
- 34335
- Resolver ID
- CaltechAUTHORS:20120925-073833523
- ANPCyT (Argentina)
- YerPhl (Armenia)
- ARC (Australia)
- BMWF (Austria)
- ANAS (Azerbaijan)
- SSTC (Belarus)
- CNPq and FAPESP (Brazil)
- NSERC (Canada)
- NRC and CFI (Canada)
- CFI (Canada)
- CERN
- CONICYT (Chile)
- CAS
- MOST and NSFC (China)
- COLCIENCIAS (Colombia)
- MSMT CR (Czech Republic)
- MPO CR and VSC CR (Czech Republic)
- DNRF (Denmark)
- DNSRC and Lundbeck Foundation (Denmark)
- EPLANET and ERC
- European Union
- IN2P3-CNRS (France)
- CEA-DSM/IRFU (France)
- GNAS (Georgia)
- BMBF (Germany)
- DFG (Germany)
- HGF (Germany)
- MPG and AvH Foundation (Germany)
- GSRT (Greece)
- ISF (Israel)
- MINERVA (Israel)
- GIF (Israel)
- DIP and Benoziyo Center (Israel)
- INFN (Italy)
- MEXT and JSPS (Japan)
- CNRST (Morocco)
- FOM and NWO (The 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 (Switzerland)
- SNSF and Cantons of Bern in Geneva (Switzerland)
- NSC (Taiwan)
- TAEK (Turkey)
- STFC (United Kingdom)
- Royal Society and Leverhulme Trust (United Kingdom)
- Department of Energy (DOE)
- NSF
- Created
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2012-09-25Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field