Dalitz Decay of Pseudoscalar Mesons from Photoproduction on Hydrogen Target with CLAS

Experimental results on the Dalitz decay of pseudoscalar mesons P($\pi^{0}, \eta, \eta^{\prime} $) $\rightarrow e^{+} e^{-} \gamma$ produced in the photoproduction reaction $\gamma$ + p $\rightarrow$ P($\pi^{0}, \eta, \eta^{\prime} $) + p on a Hydrogen target, with CLAS setup at Thomas Jefferson National Accelerator Facility (TJNAF), are presented. The total statistics collected for $\pi^{0}, \eta$ Dalitz decay exceeds the world's published statistics by an order of magnitude, while the Dalitz decay of $\eta^{\prime} \rightarrow e^{+} e^{-} \gamma$ is observed and measured for the first time. The data obtained will allow for measurements of transition form factors that are encoded in the mass spectrum of the $e^{+} e^{-}$ system. The current status of analysis of the $\pi^{0}, \eta$ transition form factors and the search for the heavy photon from the $e^{+} e^{-}$ mass system will be discussed.