2、nddecayrates,forelementaryparticlesinthehighlysuccessfultheoriesofQuantumElectrodynamics(QED)andQuantumChromodynamics(QCD).MostofourworkwillbeinunderstandinghowtocomputeinQED.BytheendofthecourseyoushouldbeabletogofromaFeynmandiagram,suchastheonefore e ! ingu