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Evidence for WW production from double-parton interactions in proton–proton collisions at 푠√=13TeV

Journal Contribution - Journal Article

A search for 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 13TeV . The analyzed data set corresponds to an integrated luminosity of 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 WW production via double-parton scattering, with a significance of 3.9 standard deviations. The measured inclusive cross section is 1.41±0.28(stat)±0.28(syst)pb .
Journal: Eur.Phys.J C
ISSN: 1434-6044
Volume: 80
Publication year:2020
Accessibility:Open