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Four top quarks and the tt¯ forward-backward asymmetry
dc.contributor.author | Aguilar Saavedra, Juan Antonio | |
dc.contributor.author | Santiago Pérez, José | |
dc.date.accessioned | 2014-02-24T12:30:55Z | |
dc.date.available | 2014-02-24T12:30:55Z | |
dc.date.issued | 2012 | |
dc.identifier.citation | 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] | es_ES |
dc.identifier.issn | 1550-2368 | |
dc.identifier.issn | 1550-7998 | |
dc.identifier.other | doi: 10.1103/PhysRevD.85.034021 | |
dc.identifier.other | arXiv:1112.3778v2 | |
dc.identifier.uri | http://hdl.handle.net/10481/30530 | |
dc.description.abstract | 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. | es_ES |
dc.description.sponsorship | This work has been partially supported by MICINN project FPA2006-05294, FPA2010-17915 and Junta de Andalucía projects FQM 101, FQM 03048 and FQM 6552. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | American Physical Society | es_ES |
dc.rights | Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License | es_ES |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/ | es_ES |
dc.subject | Top quark | es_ES |
dc.subject | Forward-backward (FB) | es_ES |
dc.subject | Asymmetry | es_ES |
dc.title | Four top quarks and the tt¯ forward-backward asymmetry | es_ES |
dc.type | info:eu-repo/semantics/preprint | es_ES |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es_ES |