Day 180: Mass Plot from CMS Masterclass

This isn’t from today, but following up on the CMS Masterclass which was featured in a few daily posts. After completing the activity, we had a question about our mass plot based on about 1300 events.


We discussed the J/psi at 3 GeV, the upsilon at 9 GeV, the Z at 91 GeV, and the Higgs at 125 GeV. There was a peak at 71 GeV which I couldn’t explain. After checking with a couple of physicists at Fermilab, it appears that the 71 GeV bump is a statistical fluctuation.

Fantastic activity for students. Find and attend a Particle Physics Masterclass next year if you can!

  ##practicumlab ##particlephysics  

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