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Title
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Search for same-sign top-quark pair production at = 7 TeV and limits on flavour changing neutral currents in the top sector
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Author
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Institution/Organisation
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CMS Collaboration
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Abstract
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| An inclusive search for same-sign top-quark pair production in pp collisions at s=7 TeV is performed using a data sample recorded with the CMS detector in 2010, corresponding to an integrated luminosity of 35 pb−1. This analysis is motivated by recent studies of pptt reporting mass-dependent forward-backward asymmetries larger than expected from the standard model. These asymmetries could be due to Flavor Changing Neutral Currents (FCNC) in the top sector induced by t-channel exchange of a massive neutral vector boson (Z′). Models with such a Z′ also predict enhancement of same-sign top-pair production in pp or pp collisions. Limits are set as a function of the Z′ mass and its couplings to u and t quarks. These limits disfavour the FCNC interpretation of the Tevatron results. |
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Language
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English
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Source (journal)
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Journal of high energy physics. - Bristol
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Publication
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Bristol
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2011
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ISSN
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1126-6708
1029-8479
[online]
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DOI
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10.1007/JHEP08(2011)005
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Volume/pages
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8
(2011)
, p. 1-27
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Article Reference
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005
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ISI
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000294901400077
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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