AI Article Synopsis
- * The study used a data sample with an integrated luminosity of 2.05 fb at a proton-proton collision energy of 7 TeV, but found no evidence of resonance.
- * Limits on the production of narrow bosons were established, with 95% credibility level limits showing excluded mass ranges from 500 GeV to 1300 GeV, specifically ruling out a leptophobic topcolor boson below 880 GeV.
Article 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, 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 [Formula: see text] for narrow and wide resonances. For narrow ' bosons, the observed 95 % Bayesian credibility level limits range from 9.3 pb to 0.95 pb for masses in the range of =500 GeV to =1300 GeV. The corresponding excluded mass region for a leptophobic topcolour ' boson (Kaluza-Klein gluon excitation in the Randall-Sundrum model) is <880 GeV ([Formula: see text]).
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Source |
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4371072 | PMC |
| http://dx.doi.org/10.1140/epjc/s10052-012-2083-1 | DOI Listing |
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