Measurements of long-range azimuthal anisotropies and associated Fourier coefficients for pp collisions at s√=5.02 and 13 TeV and p+Pb collisions at sNN−−−√=5.02 TeV with the ATLAS detector

ATLAS measurements of two-particle correlations are presented for √ s = 5.02 and 13 TeV pp collisions and for √ sNN = 5.02 TeV p+Pb collisions at the LHC. The correlation functions are measured as a function of relative azimuthal angle ∆φ, and pseudorapidity separation ∆η, using charged particles de...

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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, Marceca, Gino, Otero y Garzon, Gustavo Javier, Piegaia, Ricardo Nestor, Sacerdoti, Sabrina, 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:11336/70172
Acesso em linha:http://hdl.handle.net/11336/70172
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:ATLAS measurements of two-particle correlations are presented for √ s = 5.02 and 13 TeV pp collisions and for √ sNN = 5.02 TeV p+Pb collisions at the LHC. The correlation functions are measured as a function of relative azimuthal angle ∆φ, and pseudorapidity separation ∆η, using charged particles detected within the pseudorapidity interval |η|<2.5. Azimuthal modulation in the long-range component of the correlation function, with |∆η|>2, is studied using a template fitting procedure to remove a “back-to-back” contribution to the correlation function that primarily arises from hard-scattering processes. In addition to the elliptic, cos (2∆φ), modulation observed in a previous measurement, the pp correlation functions exhibit significant cos (3∆φ) and cos (4∆φ) modulation. The Fourier coefficients vn,n associated with the cos (n∆φ) modulation of the correlation functions for n = 2–4 are measured as a function of charged-particle multiplicity and charged-particle transverse momentum. The Fourier coefficients are observed to be compatible with cos (nφ) modulation of per-event single-particle azimuthal angle distributions. The single-particle Fourier coefficients vn are measured as a function of charged-particle multiplicity, and charged-particle transverse momentum for n= 2–4. The integrated luminosities used in this analysis are, 64 nb−1 for the √ s = 13 TeV pp data, 170 nb−1 for the √ s = 5.02 TeV pp data and 28 nb−1 for the √ sNN = 5.02 TeV p+Pb data.

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