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


Autoria(s): Onofre, A.; ATLAS Collaboration
Data(s)

2015

Resumo

Charged-particle spectra obtained in 0.15nb−1 of Pb+Pb interactions at sNN−−−√=2.76TeV and 4.2pb−1 of pp interactions at s√=2.76TeV with the ATLAS detector at the LHC are presented in a wide transverse momentum (0.5<pT<150GeV) 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 calorimeter located on both sides of the interaction point. The nuclear modification factors RAA and RCP are presented in detail as function of centrality, pT and η. They show a distinct pT-dependence with a pronounced minimum at about 7GeV. Above 60GeV, 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.

Identificador

Aad, G., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdinov, O., . . . Zwalinski, L. (2015). Measurement of charged-particle spectra in Pb+Pb collisions at (Formula presented.) = 2.76 TeV with the ATLAS detector at the LHC. Journal of High Energy Physics, 2015(9). doi: 10.1007/jhep09(2015)050

1029-8479

http://hdl.handle.net/1822/39908

10.1007/jhep09(2015)050

Idioma(s)

eng

Publicador

Springer Verlag

Direitos

info:eu-repo/semantics/openAccess

Palavras-Chave #Relativistic heavy ion physics #Particle and resonance production #Experimental results
Tipo

info:eu-repo/semantics/article