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Evidence for $$\text {W}\text {W}$$ production from double-parton interactions in proton–proton collisions at $$\sqrt{s} = 13 \,\text {TeV} $$

Author
Królikowski, Jan
Doroba, Krzysztof
Kalinowski, Artur
Konecki, Marcin
Wolf, M.
Woodard, A.
Alimena, J.
Bylsma, B.
Taroni, S.
Wayne, M.
Publication date
2020
Abstract (EN)

A search forWWproduction 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 TeV. The analyzed data set corresponds to an integrated luminosity of 77.4 fb-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.

PBN discipline
physical sciences
Journal
European Physical Journal C
Volume
80
Issue
1
ISSN
1434-6044
Open access license
Closed access