Compact Muon Solenoid
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| CMS-EXO-11-006 ; CERN-PH-EP-2012-077 | ||
| Search for anomalous tˉt production in the highly-boosted all-hadronic final state | ||
| CMS Collaboration | ||
| 11 April 2012 | ||
| J. High Energy Phys. 09 (2012) 029 [Erratum] | ||
| Abstract: A search is presented for a massive particle, generically referred to as a Z', decaying into a t t-bar pair. The search focuses on Z' resonances that are sufficiently massive to produce highly Lorentz-boosted top quarks, which yield collimated decay products that are partially or fully merged into single jets. The analysis uses new methods to analyze jet substructure, providing suppression of the non-top multijet backgrounds. The analysis is based on a data sample of proton-proton collisions at a center-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 5 inverse femtobarns. Upper limits in the range of 1 pb are set on the product of the production cross section and branching fraction for a topcolor Z' modeled for several widths, as well as for a Randall--Sundrum Kaluza--Klein gluon. In addition, any enhancement to t t-bar production for invariant masses above 1 TeV in the standard model is constrained. | ||
| Links: e-print arXiv:1204.2488 [hep-ex] (PDF) ; CDS record ; inSPIRE record ; Public twiki page ; CADI line (restricted) ; | ||
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Compact Muon Solenoid LHC, CERN |
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