Sadly the D0 experiment sees no bump in boson+dijet at Fermilab, dismissing the 4.1 sigma result of CDF.
Now the two experiments need to get together to work out which is wrong and why. It is not a sure conclusion that D0 is right but it seems more likely that someone would see an effect that isn’t there by mistake than that someone would fail to see an effect that is there. This gives D0 a strong psychological advantage.
To find out what went wrong they have to compare the raw plots and the background as seen in these plots
The differences are too subtle to see from just the visual image, and it does not help that they used different bins. There does appear to be significant differences in the backgrounds while the data look quite similar. If that is the case then the problem is purely theoretical and they just need to compare their background calculations. However, the detectors are different so perhaps the backgrounds should not look exactly the same. Only the people directly involved have enough details to get to the bottom of it.
I hope they will work it out and let us know because it would be nice to see that their understanding of their results can be improved to give better confidence in any similar future results.
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