Study of the hard double-parton scattering contribution to inclusive four-lepton production in pp collisions at s=8 TeV with the ATLAS detector

The inclusive production of four isolated charged leptons in pp collisions is analysed for the presence of hard double-parton scattering, using 20.2 of data recorded in the ATLAS detector at the LHC at centre-of-mass energy TeV. In the four-lepton invariant-mass range of GeV, an artificial neural ne...

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Detalles Bibliográficos
Autores: Álvarez Piqueras, D., Aparisi Pozo, J.A., Bailey, A.J., Barranco, Laura, Cabrera, Susana, Castillo, F.L., Castillo Gimenez, M. V., Cerda Alberich, L., Costa, María José, Escobar, Carlos, Estrada, Oscar, Ferrer, Antonio, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, González de la Hoz, Santiago, Higón, Emilio, Jimenez Pena, Javier, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Madaffari, Daniele, Mamuzic, Judita, Martí García, Salvador, Melini, Davide, Miñano Moya, M., Mitsou, Vasiliki A., Rodriguez Bosca, S., Rodriguez Rodriguez, D., Ruiz Martínez, Arantxa, Salt, José, Santra, A., Sánchez Martínez, Javier, Soldevila, Urmila, Valero, Alberto, Valls Ferrer, Juan Antonio, Vos, Marcel, ATLAS Collaboration
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2019
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/197863
Acceso en línea:http://hdl.handle.net/10261/197863
Access Level:acceso abierto
Palabra clave:ddc:500.2
ddc:530
Descripción
Sumario:The inclusive production of four isolated charged leptons in pp collisions is analysed for the presence of hard double-parton scattering, using 20.2 of data recorded in the ATLAS detector at the LHC at centre-of-mass energy TeV. In the four-lepton invariant-mass range of 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 , which results in an estimated lower limit on the effective cross section at 95% confidence level of 1.0 mb.

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