The electromagnetic Nucleon to Delta transition in Chiral Effective   Field Theory
  We present a calculation of the three complex form factors parametrizing the nucleon to Delta transition matrix element in the framework of chiral effective field theory with explicit Delta degrees of freedom. The interplay between short and long range physics is discussed and estimates for systematic uncertainties due to higher order effect are given. 
Tobias A. Gail and Thomas R. Hemmert