CERN Accelerating science

Article
Report number arXiv:1204.2488 ; CMS-EXO-11-006 ; CERN-PH-EP-2012-077 ; CMS-EXO-11-006 ; CERN-PH-EP-2012-077
Title Search for anomalous tˉt production in the highly-boosted all-hadronic final state
Author(s) CMS Collaboration  Показване на всичките 2212 автора
Publication 2012-09-11
Imprint 11 Apr 2012
Number of pages 39
Note Comments: Submitted to the Journal of High Energy Physics
In: JHEP 09 (2012) pp.029
JHEP 03 (2014) pp.132
DOI 10.1007/JHEP09(2012)029
10.1007/JHEP03(2014)132 (Erratum)
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; CMS
Free keywords exotics
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.
Related document supersedes: CMS-PAS-EXO-11-006
Copyright/License publication: © 2012-2025 CERN (License: CC-BY-3.0)
preprint: © 2012-2025 CERN (License: Open Access)



Corresponding record in: Inspire
Email contact: cms-publication-committee-chair@cern.ch


 Записът е създаден на 2012-04-11, последна промяна на 2024-08-24


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