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RE: There and back again - A steemSTEM meetup at CERN
Oh ok, I missed the Quantum Chromodynamics (strong interaction) parts then. Well I guessed I'm not used to such a compact notation ^^
Thanks, I will correct that
The field strength tensor squared term (the -1/4 F_{\mu\nu} F^{\mu\nu} term) is actually summed over all the three gauge groups of the model. Although in general, this stands for QED only, here it must be understood as standing for all three interactions. :)
I know it is confusing for anyone who is not used to it :)