Observation of same-sign WW production from double parton scattering in proton-proton collisions at √s = 13 TeV

Авторы: Belyaev A.V., Boos E., Bunichev V., Dubinin M., Dudko L., Ershov A.A., Klyukhin V., Kodolova O., Lukina O., Obraztsov S., Savrin V., Snigirev A., CMS Collaboration
Журнал: Physical Review Letters
Том: 131
Год издания: 2023
Издательство: American Physical Society
Местоположение издательства: United States
Первая страница: 091803
DOI: 10.1103/PhysRevLett.131.091803
Аннотация: The first observation of the production of W+-W+- bosons from double parton scattering processes usingsame-sign electron-muon and dimuon events in proton-proton collisions is reported. The data sample corresponds to an integrated luminosity of 138 fb−1 recorded at a center-of-mass energy of 13 TeV usingthe CMS detector at the CERN LHC. Multivariate discriminants are used to distinguish the signal process from the main backgrounds. A binned maximum likelihood fit is performed to extract the signal cross section. The measured cross section for production of same-sign W bosons decaying leptonically is 80.7 +- 11.2(stat) +9.5−8.6(syst) +- 12.1(model) fb, whereas the measured fiducial cross section is 6.28 +- 0.81(stat) +- 0.69(syst) +- 0.37(model) fb. The observed significance of the signal is 6.2 standard deviations above the background-only hypothesis.
Добавил в систему: Клюхин Вячеслав Иванович

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