Seminarium "Teoria cząstek elementarnych i kosmologia"

Double parton scattering (DPS) is a mechanism in which two hard parton-level processes take place in a single collision. This can yield important contributions to search processes at the LHC, a prominent channel being like-sign lepton pair production in proton-proton collision via the production of two W bosons of equal charge. Indeed, the CMS collaboration recently announced the first observation of DPS in this channel (Phys. Rev. Lett. 131, 091803). In my talk, I will discuss the theoretical description of double parton scattering at large transverse momenta and will present the predictions for the transverse momentum-dependent differential crosssection of like-sign W production in the discussed process.