Your opinion on a suggestive excess of same-sign lepton pairs March 17, 2008Posted by dorigo in games, news, physics, science.
A hot new result from CDF has emerged in a global analysis of Run II data by an automated search called VISTA-SLEUTH. I intend to discuss it tomorrow, but I thought I would in the meantime post just a simple, impressive plot here, together with a test. Mind you, I will be probably criticized for taking the plot out of context, but this is indeed a test -and the plot is goddamn blessed.
The idea is to ask you, dear reader, whether the study of that plot alone – which shows the transverse momentum distribution of muon tracks in events with a muon and an electron having the same electric charge found by CDF in 2 inverse femtobarns of Tevatron Run II data- would allow you to conclude that either:
- The Standard Model is dead, and this is the first firm evidence of the creation of some new exotic doubly-charged particle
- There is a mistake in the shape of the background
- There is a funny fluctuation in the number of high-Pt muon events seen by CDF containing an additional electron candidate with the same charge sign
- There is a systematic underestimation of the probability of assigning the wrong charge to electrons
A sucked mint will be sent via flying pidgeon to the first commenter indicating which of the above four interpretations is considered the most likely.
PS: since the plot is a .gif file and it shows poorly above, and I am too lazy to fish out a better one tonight, here are the entries in the data (black points with almost invisible error bars) in each of the bins: 0, 2, 5, 4, 4, 7, 7, 7, 2, 4, 2, plus a single outlier far away.