Singlet quarks beyond the top at the Tevatron?
arXiv:hep-ph/9405224 · doi:10.1016/0370-2693(94)90386-7
Abstract
The first evidence for the top quark at the Tevatron may indicate a cross section higher than the QCD expectation. We consider the possibility that isosinglet heavy quarks may be contributing to the signal and discuss ways of testing this possibility. For example, a charge $\case2/3$ singlet quark, approximately degenerate and mixing with the top quark, would effectively double the standard top signals. A charge $-\case1/3$ singlet quark mixing with the bottom quark would not affect top signals but would generate excess multijet events with a -tag.
8 pages, Latex, necessary macros included. No figures. MAD/PH/830