N→N* transition GPD measurements with CLAS12 at JLAB

The measurement of transition GPDs is a unique tool to understand the 3 dimensional structure and the mechanical properties of nucleon resonances for the first time. To extract transition GPDs, the non-diagonal DVCS process can be used. In this process a pion-nucleon system, originating from the decay of an N* resonance, is produced in addition to a real photon. Because the factorisation of this process amplitude requires the constraints on Mandelstam variable t and photon virtuality Q² (-t/Q² << 1) and several final state particles have to be detected for a clean identification, CLAS12 in combination with the upgraded CEBAF accelerator at JLAB provides a unique opportunity to study this process. The talk will introduce the topic and present an on-going analysis effort on the recently collected CLAS12 data. The analysis will be discussed in the context of theoretical predictions for the p → delta transition GPDs.