Relativistic, model-independent determination of electromagnetic finite-size effects beyond the pointlike approximation : Relativistic, model-independent determination of electromagnetic finite-size effects beyond the pointlike approximation
We present a relativistic and model-independent method to derive structure-dependent electromagnetic finite-size effects. This is a systematic procedure, particularly well-suited for automation, which works at arbitrarily high orders in the large-volume expansion. Structure-dependent coefficients appear as zero-momentum derivatives of physical form factors which can be obtained through experimenta