Calculation of the N to Delta electromagnetic transition matrix element

C. Alexandrou, Ph. de Forcrand, Th. Lippert +5

We present results on the ratio of electric quadrupole to magnetic dipole amplitudes, $R_{EM}={\mathcal{G}}_{E2}/{\mathcal{G}}_{M1}$, for the transition $\gamma Nto\Delta$ from lattice QCD. We consid…