Measurement of flow harmonics with multi-particle cumulants in Pb+Pb collisions at √sNN = 2.76 TeV with the ATLAS detector

ATLAS measurements of the azimuthal anisotropy in lead?lead collisions at s NN = 2.76 TeV areshown using a dataset of approximately 7 μb −1 collected at the LHC in 2010. The measurements areperformed for charged particles with transverse momenta 0.5 < p T < 20 GeV and in the pseudorapidityrang...

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Detalles Bibliográficos
Autores: Aad, G., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdinov, O., Otero y Garzon, Gustavo Javier, Piegaia, Ricardo Nestor, Sacerdoti, Sabrina, Reisin, Hernan Diego, Alconada Verzini, María Josefina, Alonso, Francisco, Anduaga, Xabier Sebastian, Arduh, Francisco Anuar, Dova, Maria Teresa, Monticelli, Fernando Gabriel, Wahlberg, Hernan Pablo, Zhukov, K., Zibell, A., Zieminska, D., Zimine, N. I., Zimmermann, C., Zimmermann, R., Zimmermann, S., Ziolkowski, M., Zobernig, G., Zoccoli, A., Nedden, M. zur, Zurzolo, G., Zutshi, V., Zwalinski, L., The ATLAS Collaboration
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2014
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/106379
Acceso en línea:http://hdl.handle.net/11336/106379
Access Level:acceso abierto
Palabra clave:ATLAS
CERN
LHC
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
Descripción
Sumario:ATLAS measurements of the azimuthal anisotropy in lead?lead collisions at s NN = 2.76 TeV areshown using a dataset of approximately 7 μb −1 collected at the LHC in 2010. The measurements areperformed for charged particles with transverse momenta 0.5 < p T < 20 GeV and in the pseudorapidityrange |η| < 2.5. The anisotropy is characterized by the Fourier coefficients, v n , of the charged-particleazimuthal angle distribution for n = 2?4. The Fourier coefficients are evaluated using multi-particlecumulants calculated with the generating function method. Results on the transverse momentum,pseudorapidity and centrality dependence of the v n coefficients are presented. The elliptic flow, v 2 ,is obtained from the two-, four-, six- and eight-particle cumulants while higher-order coefficients, v 3and v 4 , are determined with two- and four-particle cumulants. Flow harmonics v n measured with four-particle cumulants are significantly reduced compared to the measurement involving two-particle cu-mulants. A comparison to v n measurements obtained using different analysis methods and previouslyreported by the LHC experiments is also shown. Results of measurements of flow fluctuations evalu-ated with multi-particle cumulants are shown as a function of transverse momentum and the collisioncentrality. Models of the initial spatial geometry and its fluctuations fail to describe the flow fluctuationsmeasurements.

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