Measurement of charged-particle spectra in Pb+Pb collisions at sqrt(sNN) = 2.76 TeV with the ATLAS detector at the LHC

 

Autores
Aad, G.; Abbott, B.; Abdallah, J.; Abdinov, O.; Aben, R.; Alconada Verzini, María Josefina; Alonso, Francisco; Arduh, Francisco Anuar; Dova, Maria Teresa; Monticelli, Fernando Gabriel; Wahlberg, Hernan Pablo; Otero y Garzon, Gustavo Javier; Piegaia, Ricardo Nestor; Reisin, Hernan Diego; Sacerdoti, Sabrina; Zieminska, D.; Zimine, N. I.; Zimmermann, C.; Zimmermann, R.; Zimmermann, S.; Zinonos, Z.; Zinser, M.; Ziolkowski, M.; Živković, L.; Zobernig, G.; Zoccoli, A.; Nedden, M. zur; Zurzolo, G.; Zwalinski, L.; The ATLAS Collaboration
Tipo de recurso
artículo
Estado
Versión publicada
Año de publicación
2015
País
Argentina
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio
CONICET Digital (CONICET)
Descripción
Charged-particle spectra obtained in Pb+Pb interactions at √ sNN = 2.76 TeV and pp interactions at √ s = 2.76 TeV with the ATLAS detector at the LHC are presented, using data with integrated luminosities of 0.15 nb−1 and 4.2 pb−1 , respectively, in a wide transverse momentum (0.5 < pT < 150 GeV) and pseudorapidity (|η| < 2) range. For Pb+Pb collisions, the spectra are presented as a function of collision centrality, which is determined by the response of the forward calorimeters located on both sides of the interaction point. The nuclear modification factors RAA and RCP are presented in detail as a function of centrality, pT and η. They show a distinct pT-dependence with a pronounced minimum at about 7 GeV. Above 60 GeV, RAA is consistent with a plateau at a centrality-dependent value, within the uncertainties. The value is 0.55 ± 0.01(stat.) ± 0.04(syst.) in the most central collisions. The RAA distribution is consistent with flat |η| dependence over the whole transverse momentum range in all centrality classes
Idioma
inglés
OAI Identifier
oai:ri.conicet.gov.ar:11336/54107
Enlace del recurso
http://hdl.handle.net/11336/54107
Nivel de acceso
Acceso abierto
Materia
CERN
ATLAS
LHC
Astronomía
Ciencias Físicas
CIENCIAS NATURALES Y EXACTAS