Measurement of the prompt J/ψ √ pair production cross-section in pp collisions at s = 8 TeV with the ATLAS detector

The production of two prompt J/ψ mesons, each with transverse momenta p T > 8.5 GeV√and rapidity |y| < 2.1, is studied using a sample of proton-proton collisions at s = 8 TeV,corresponding to an integrated luminosity of 11.4 fb −1 collected in 2012 with the ATLASdetector at the LHC. The differ...

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Detalhes bibliográficos
Autores: Aaboud, M., Aad, G., Abbott, B., Abdallah, J., Abdinov, O., Alconada Verzini, María Josefina, Alonso, Francisco, Arduh, Francisco Anuar, Dova, Maria Teresa, Hoya, Joaquín, Monticelli, Fernando Gabriel, Wahlberg, Hernan Pablo, Bossio Sola, Jonathan David, Otero y Garzon, Gustavo Javier, Piegaia, Ricardo Nestor, Sacerdoti, Sabrina, Zhukov, K., Zibell. A., Zieminska, D., Zimine, N. I., Zimmermann, C., Zimmermann, S., Zinonos, Z., Zinser, M., Ziolkowski, M., Živković, L., Zobernig, G., Zoccoli, A., Nedden, M. zur, Zurzolo, G., Zwalinski, L., The ATLAS Collaboration
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2016
País:Argentina
Recursos:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/114028
Acesso em linha:http://hdl.handle.net/11336/114028
Access Level:acceso abierto
Palavra-chave:ATLAS
Cern
Hep
LHC
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
Descrição
Resumo:The production of two prompt J/ψ mesons, each with transverse momenta p T > 8.5 GeV√and rapidity |y| < 2.1, is studied using a sample of proton-proton collisions at s = 8 TeV,corresponding to an integrated luminosity of 11.4 fb −1 collected in 2012 with the ATLASdetector at the LHC. The differential cross-section, assuming unpolarised J/ψ production,is measured as a function of the transverse momentum of the lower-p T J/ψ meson, di-J/ψp T and mass, the difference in rapidity between the two J/ψ mesons, and the azimuthalangle between the two J/ψ mesons. The fraction of prompt pair events due to double partonscattering is determined by studying kinematic correlations between the two J/ψ mesons.The total and double parton scattering cross-sections are compared with predictions. Theeffective cross-section of double parton scattering is measured to be σ eff = 6.3 ± 1.6(stat) ±1.0(syst) mb.

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