Evidence for WW production from double-parton interactions in proton–proton collisions at s=13TeV Academic Article uri icon

abstract

  • AbstractA search for $$ ext {W} ext {W}$$WW production from double-parton scattering processes using same-charge electron-muon and dimuon events is reported, based on proton-proton collision data collected at a center-of-mass energy of $$13, ext {TeV} $$13TeV. The analyzed data set corresponds to an integrated luminosity of $$77.4{, ext {fb}^{-1}} $$77.4fb-1, collected using the CMS detector at the LHC in 2016 and 2017. Multivariate classifiers are used to discriminate between the signal and the dominant background processes. A maximum likelihood fit is performed to extract the signal cross section. This leads to the first evidence for $$ ext {W} ext {W}$$WW production via double-parton scattering, with a significance of 3.9 standard deviations. The measured inclusive cross section is $$1.41pm 0.28, ext {(stat)} pm 0.28, ext {(syst)} , ext {pb} $$1.41±0.28(stat)±0.28(syst)pb.

author list (cited authors)

  • Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Brandstetter, J., ... Woods, N.

citation count

  • 3

publication date

  • January 2020