Four top quarks and the tt¯ forward-backward asymmetry Aguilar Saavedra, Juan Antonio Santiago Pérez, José Top quark Forward-backward (FB) Asymmetry New colour octet vectors below the TeV scale could explain the anomalous t tbar forward-backward asymmetry observed at the Tevatron experiments, while being consistent with the current LHC data. These models generally lead to four-top final states at the LHC at observable levels. We compute the four-top production cross section at the LHC in a model with a massive colour octet vector as a function its mass, its width and its coupling to the top quark. Octet masses in the vicinity of the t tbar threshold are generally excluded by present limits on the production of same-sign dileptons and trileptons. Masses above 650 GeV are allowed, quite independently of the couplings, but they can be probed with the luminosity of 5 fb^-1 already collected at the LHC, up to around 800 GeV. The four-top production cross section is increased by a factor ~ 2 with sqrt{s}=8 TeV and by up to almost two orders of magnitude with sqrt{s}=14 TeV, thus greatly increasing the reach for massive gluons after the LHC energy upgrade. 2014-02-24T12:30:55Z 2014-02-24T12:30:55Z 2012 info:eu-repo/semantics/preprint Aguilar-Saavedra, J.A.; Santiago, J. Four top quarks and the tt¯ forward-backward asymmetry. Physical Review D, 85: 034021 (2012). [http://hdl.handle.net/10481/30530] 1550-2368 1550-7998 doi: 10.1103/PhysRevD.85.034021 arXiv:1112.3778v2 http://hdl.handle.net/10481/30530 eng http://creativecommons.org/licenses/by-nc-nd/3.0/ info:eu-repo/semantics/openAccess Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License American Physical Society