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| CMS-EXO-11-065 ; CERN-PH-EP-2011-087 | ||
| Search for Same-Sign Top-Quark Pair Production at $\sqrt{s}$ = 7 TeV and Limits on Flavour Changing Neutral Currents in the Top Sector | ||
| CMS Collaboration | ||
| 13 June 2011 | ||
| J. High Energy Phys. 08 (2011) 005 | ||
| Abstract: An inclusive search for same-sign top-quark pair production in pp collisions at sqrt(s) = 7 TeV is performed using a data sample recorded with the CMS detector in 2010, corresponding to an integrated luminosity of 35 inverse picobarns. This analysis is motivated by recent studies of p p-bar to t t-bar 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 p p-bar 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. | ||
| Links: e-print arXiv:1106.2142 [hep-ex] (PDF) ; CDS record ; inSPIRE record ; Public twiki page ; CADI line (restricted) ; | ||
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