Measurement of the azimuthal anisotropy of neutral pions in Pb-Pb collisions at √sNN=2.76 TeV
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
27/05/2014
27/05/2014
22/01/2013
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Resumo |
First measurements of the azimuthal anisotropy of neutral pions produced in Pb-Pb collisions at a center-of-mass energy of √sNN=2.76 TeV are presented. The amplitudes of the second Fourier component (v2) of the π0 azimuthal distributions are extracted using an event-plane technique. The values of v2 are studied as a function of the neutral pion transverse momentum (pT) for different classes of collision centrality in the kinematic range 1.6<pT<8.0 GeV/c, within the pseudorapidity interval |η|<0.8. The CMS measurements of v 2(pT) are similar to previously reported π0 azimuthal anisotropy results from √sNN=200 GeV Au-Au collisions at RHIC, despite a factor of ∼14 increase in the center-of-mass energy. In the momentum range 2.5<pT<5.0 GeV/c, the neutral pion anisotropies are found to be smaller than those observed by CMS for inclusive charged particles. © 2013 CERN. |
Identificador |
http://dx.doi.org/10.1103/PhysRevLett.110.042301 Physical Review Letters, v. 110, n. 4, 2013. 0031-9007 1079-7114 http://hdl.handle.net/11449/74409 10.1103/PhysRevLett.110.042301 WOS:000313951300005 2-s2.0-84872729726 2-s2.0-84872729726.pdf |
Idioma(s) |
eng |
Relação |
Physical Review Letters |
Direitos |
closedAccess |
Palavras-Chave | #Azimuthal anisotropy #Azimuthal distributions #Center-of-mass energies #Fourier components #Kinematic range #Momentum range #Neutral pions #Pb-Pb collisions #Pseudorapidities #Transverse momenta #Anisotropy #Colliding beam accelerators #Hadrons #High energy physics #Tellurium compounds #Lead |
Tipo |
info:eu-repo/semantics/article |