Double Parton Interactions in $2\gamma + 2$ jets events in $p\bar{p}$ collisions at $\sqrt{s} = 1.96$ TeV at D0

We use a sample of diphoton + dijet events collected by the D0 detector in a data sample corresponding to an integrated luminosity of about 8.7 fb$^{-1}$ of $p\bar{p}$ collisions at the Fermilab Tevatron collider, to study properties of events with double-parton scattering (DPS) in single $p\bar{p}$ collisions at $\sqrt{s} = 1.96$ TeV. We describe the measurement of the DPS event fraction, the effective cross section ($\sigma_{\mathrm{eff}}$), for double-parton scattering