Study of the hard double-parton scattering contribution to inclusive four-lepton production in pp collisions at root s=8 TeV with the ATLAS detector
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Dosyalar
Tarih
2019-03-10
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Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
The inclusive production of four isolated charged leptons in pp collisions is analysed for the presence of hard double-parton scattering, using 20.2 fb(-1) of data recorded in the ATLAS detector at the LHC at centre-of-mass energy root s = 8 TeV. In the four-lepton invariant-mass range of 80 < m(4l) < 1000 GeV, an artificial neural network is used to enhance the separation between single- and double-parton scattering based on the kinematics of the four leptons in the final state. An upper limit on the fraction of events originating from double-parton scattering is determined at 95% confidence level to be f(DPS) = 0.042, which results in an estimated lower limit on the effective cross section at 95% confidence level of 1.0 mb. (C) 2019 The Author(s). Published by Elsevier B.V.
Açıklama
Anahtar Kelimeler
Four-lepton production, Double Drell-Yan, Double parton-scattering, Higgs golden decay channel
Kaynak
PHYSICS LETTERS B
WoS Q Değeri
Q1
