Measurement of double parton scattering in same-sign WW production in p-p collisions at $\sqrt{s}=13~\mathrm{TeV}$ with the CMS experiment

Same-sign W$^{\pm}$W$^{\pm}$ production in which the bosons originate from two distinct parton-parton interactions within the same proton-proton collision is studied in the $\mu^{\pm}\mu^{\pm}$ and $e^{\pm}\mu^{\pm}$ final states. A data set of 35.9 fb$^{-1}$ of proton-proton collisions at $\sqrt{s}=13\, \mathrm{TeV}$, recorded with the CMS detector at the LHC in 2016, is used. A multivariate classifier is trained to distinguish the signal process from the main background components. A measurement of the double-parton scattering process WW is performed on these data. A cross section of 1.09$^{+0.50}_{-0.49}$ pb is extracted for the inclusive WW double parton scattering process, which is compatible with the Monte-Carlo prediction of 1.64 pb.