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Title: Search for W1 → than t¯b in the lepton plus jets final state in proton-proton collisions at a centre-of-mass energy of √ s=8 TeV with the ATLAS detector

A search for new charged massive gauge bosons, called W1 , is performed with the ATLAS detector at the LHC, in proton–proton collisions at a centre-of-mass energy of √s=8 TeV, using a dataset corresponding to an integrated luminosity of 20.3 fb-1. This analysis searches for W1 bosons in the W1 →t¯b decay channel in final states with electrons or muons, using a multivariate method based on boosted decision trees. The search covers masses between 0.5 and 3.0 TeV, for right-handed or left-handed W1 bosons. No significant deviation from the Standard Model expectation is observed and limits are set on the W1 →t¯b cross-section times branching ratio and on the W1 -boson effective couplings as a function of the W -boson mass using the CLs procedure. For a left-handed (right-handed) W1 boson, masses below 1.70 (1.92) TeV are excluded at 95% confidence level.
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ;  [9] ;  [10] ;  [11] ;  [12] ;  [13] ;  [14] ;  [15] ;  [16] ;  [17] ;  [18] ;  [19]
  1. Univ. of Aix-Marselle (France)
  2. Univ. of Oklahoma, Norman, OK (United States)
  3. Academia Sinica, Taipei (Taiwan)
  4. Univ. of Paris-Sud, Orsay (France)
  5. Azerbaijan Academy of Sciences, Baku (Azerbaijan)
  6. Univ. of Amsterdam (Netherlands)
  7. Oklahoma State Univ., Stillwater, OK (United States)
  8. Michigan State Univ., East Lansing, MI (United States)
  9. Univ. of Toronto, ON (Canada)
  10. Tel Aviv Univ., Ramat Aviv (Israel)
  11. Technion-Israel Inst. of Tech., Haifa (Israel)
  12. CERN, Geneva (Switzerland)
  13. Stockholm Univ. (Sweden)
  14. Univ. of Udine (Italy)
  15. AGH Univ. of Science and Technology, Krakow (Poland)
  16. Brookhaven National Lab. (BNL), Upton, NY (United States)
  17. Northern Illinois Univ., DeKalb, IL (United States)
  18. Ludwig Maximilian Univ., Munich (Germany)
  19. Rutherford Appleton Lab, Didcot (United Kingdom). et al.
Publication Date:
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 0370-2693; KA1101021; TRN: US1600961
Grant/Contract Number:
SC00112704; AC02-06CH11357; AC03-76SF00515; AC02-05CH11231
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 743; Journal ID: ISSN 0370-2693
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Argonne National Lab. (ANL), Argonne, IL (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Contributing Orgs:
ATLAS Collaboration
Country of Publication:
United States