Double parton scattering (DPS) events, in which two hard parton-parton interactions occur in a single proton-proton collision, is an important part of the collider physics program. In this talk, a summary status of the most recent DPS analyses performed by the CMS experiment will be discussed. In particular, the first observation of DPS using same-sign WW production will be reported. In addition, the first observation of the simultaneous production of three J/Psi mesons will also be shown.
Michelangelo Mangano, Monica Pepe-Altarelli and Pedro Silva