W+Jets at CDF: Evidence for Top Quarks
  Recently, an anomaly of W+jets events at large invariant masses has been reported by CDF. Many interpretations as physics beyond the Standard Model are being offered. We show how such an invariant mass peak can arise from a slight shift in the relative normalization of the top and WW backgrounds. 
Tilman Plehn and Michihisa Takeuchi
hep-ph hep-ex