Status of the photon-photon physics with DM2 at DCI

In this paper, we present the status of the γγ experiment performed to DCI. The new apparatus DM2 includes a photon detector and has larger angular acceptance with the same momentum resolution. The new tagging system is enlarged and ensures tagging of electrons radiating between 20% and 70% of their initial energy ((20%, 53%) in the first system). This paper is divided in two parts: - in the first one, we present the ''standard'' analysis performed on a part of the available statistics. It is devoted to the study of the e+e- → e+e-X+X- process at low (X+X-) invariant mass; - in the second part, we take advantage of the photon detector of DM2, specially conceived to detect low momentum particles, to try an identification of X+- produced particles. Radiative effects are studied