Journal of High Energy Physics > 2011 > 2011 > 8 > 1-27
Search for same-sign top-quark pair production at TeV and limits on flavour changing neutral currents in the top sector
Source
Abstract
An inclusive search for same-sign top-quark pair production in pp collisions at 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 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 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.
Identifiers
journal e-ISSN : | 1029-8479 |
DOI | 10.1007/JHEP08(2011)005 |