Projects per year
Abstract
A model-independent search for the production of heavy resonances decaying into top-antitop quark pairs is presented. The search is based on events containing one lepton (muon or electron) and at least two jets selected from data samples corresponding to an integrated luminosity of 4.4-5.0 inverse femtobarns collected in pp collisions at sqrt(s) = 7 TeV. Results are presented from the combination of two dedicated searches optimized for boosted production and production at threshold. No excess of events is observed over the expected yield from the standard model processes. Topcolor Z' bosons with narrow (wide) width are excluded at 95% confidence level for masses below 1.49 (2.04) TeV and an upper limit of 0.3 (1.3) pb or lower is set on the production cross section times branching fraction for resonance masses above 1 TeV. Kaluza-Klein excitations of a gluon with masses below 1.82 TeV (at 95% confidence level) in the Randall-Sundrum model are also excluded, and an upper limit of 0.7 pb or lower is set on the production cross section times branching fraction for resonance masses above 1 TeV.
Original language | English |
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Article number | 15 |
Pages (from-to) | 1-36 |
Number of pages | 36 |
Journal | Journal of High Energy Physics |
Volume | 2012 |
Issue number | 12 |
DOIs | |
Publication status | Published - 20 Sept 2012 |
Keywords
- Hadron-Hadron Scattering
Fingerprint
Dive into the research topics of 'Search for resonant t¯t production in lepton+jets events in pp collisions at √s=7 TeV'. Together they form a unique fingerprint.Projects
- 7 Finished
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Particle physics equipment grant.
Newbold, D. M. (Principal Investigator)
1/10/12 → 1/04/13
Project: Research
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Consolidated Grant 2012-16
Newbold, D. M. (Principal Investigator) & Rademacker, J. H. (Researcher)
1/10/12 → 1/10/16
Project: Research
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Wakeham Rebate for Rolling Grant 2010-11
Newbold, D. M. (Principal Investigator)
20/02/12 → 20/03/12
Project: Research
Activities
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CMS project at CERN LHC
Heath, H. F. (Contributor)
1995 → …Activity: Other activity types › - Research and Teaching at External Organisation
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CERN - European Organization for Nuclear Research (External organisation)
Goldstein, J. (Participant)
1993 → …Activity: Membership types › Membership of external research organisation