Publicação: Measurement of the azimuthal anisotropy of neutral pions in Pb-Pb collisions at √sNN=2.76 TeV
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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.
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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
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Inglês
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Physical Review Letters, v. 110, n. 4, 2013.
