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Study of the hard double-parton scattering contribution to inclusive four-lepton production in pp collisions at √s = 8 TeV with the ATLAS detector
- Source :
- Miucci, Antonio; Merlassino, Claudia; Haug, Sigve; Weber, Michael; Anders, John Kenneth; Beck, Hans Peter; Ereditato, Antonio; Rimoldi, Marco; Weston, Thomas Daniel (2019). Study of the hard double-parton scattering contribution to inclusive four-lepton production in pp collisions at √s = 8 TeV with the ATLAS detector. Physics letters. B, 790, pp. 595-614. Elsevier 10.1016/j.physletb.2019.01.062
- Publication Year :
- 2019
- Publisher :
- Elsevier, 2019.
-
Abstract
- The inclusive production of four isolated charged leptons in pp collisions is analysed for the presence of hard double-parton scattering, using 20.2fb−1 of data recorded in the ATLAS detector at the LHC at centre-of-mass energy √s=8 TeV. In the four-lepton invariant-mass range of 80 < m4l < 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 fDPS=0.042, which results in an estimated lower limit on the effective cross section at 95% confidence level of 1.0mb.
- Subjects :
- 530 Physics
High Energy Physics::Phenomenology
High Energy Physics::Experiment
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Miucci, Antonio; Merlassino, Claudia; Haug, Sigve; Weber, Michael; Anders, John Kenneth; Beck, Hans Peter; Ereditato, Antonio; Rimoldi, Marco; Weston, Thomas Daniel (2019). Study of the hard double-parton scattering contribution to inclusive four-lepton production in pp collisions at √s = 8 TeV with the ATLAS detector. Physics letters. B, 790, pp. 595-614. Elsevier 10.1016/j.physletb.2019.01.062 <http://dx.doi.org/10.1016/j.physletb.2019.01.062>
- Accession number :
- edsair.doi.dedup.....31eb644b0b4075536ac7c0ada1ef1766