Electromagnetic Content of Neutral versus Charged Current Neutrino Interactions

Asymmetric high energy photon conversion, where the electron carries most of the energy, in the hadronic shower of NC events will constitute the main background to the $\nu_e$ signal in theta-13 mixing experiments such as NO$\nu$A. The fine resolution NOMAD data can address this issue precisely. Measurements of the ratios of photon and $\pi^0$ to total visible energy, in hadronic $P_T$ bins, for NC and CC will be presented along with the method for obtaining them. These can be used to calibrate current Monte Carlo to accurately predict backgrounds for NO$\nu$A, and MINOS.