Updated CDF result

Last month the CDF collaboration published evidence of an unexpected excess of particle collision events that produce a W boson accompanied by two hadronic jets. This week, CDF updated that analysis by adding an additional 3 inverse femtobarns of data. The analysis technique itself remained unchanged from the initial publication, which used 4.3 inverse femtobarns of data and observed an excess with a significance of 3.2 sigma. In the new data, an excess is seen at the same mass with a significance of 2.85 sigma. When both data sets are combined, CDF observes a peak with a significance of 4.2 sigma, which means that there is a less than 1 in 20,000 chance that the effect is mimicked by a statistical fluctuation. Work is ongoing at CDF to understand the origin of the peak. DZero has also undertaken an analysis.