Compact Muon Solenoid
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| CMS-EXO-11-005 ; CERN-PH-EP-2011-139 | ||
| Search for a Vectorlike Quark with Charge 2/3 in t + Z Events from pp Collisions at $\sqrt{s}$ = 7 TeV | ||
| CMS Collaboration | ||
| 26 September 2011 | ||
| Phys. Rev. Lett. 107 (2011) 271802 | ||
| Abstract: A search for pair-produced heavy vector-like charge-2/3 quarks, T, in pp collisions at a center-of-mass energy of 7 TeV, is performed with the CMS detector at the LHC. Events consistent with the flavor-changing-neutral-current decay of a T quark to a top quark and a Z boson are selected by requiring two leptons from the Z-boson decay, as well as an additional isolated charged lepton. In a data sample corresponding to an integrated luminosity of 1.14 inverse femtobarns, the number of observed events is found to be consistent with the standard model background prediction. Assuming a branching fraction of 100% for the decay T to tZ, a T quark with a mass less than 475 GeV/c^2 is excluded at the 95% confidence level. | ||
| Links: e-print arXiv:1109.4985 [hep-ex] (PDF) ; CDS record ; inSPIRE record ; Public twiki page ; CADI line (restricted) ; | ||
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Compact Muon Solenoid LHC, CERN |
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