Higher Harmonic Anisotropic Flow Measurements of Charged Particles in Pb-Pb Collisions at root s(NN)=2.76 TeV

0376759 - ÚJF 2013 RIV US eng J - Journal Article
Aamodt, K. - Abelev, B. - Quintana, A.A. - Adamová, Dagmar - Bielčíková, Jana - Kushpil, Svetlana - Kushpil, Vasilij - Mareš, Jiří A. - Polák, Karel - Šumbera, Michal - Závada, Petr … Total 782 authors
Higher Harmonic Anisotropic Flow Measurements of Charged Particles in Pb-Pb Collisions at root s(NN)=2.76 TeV.
Physical Review Letters. Roč. 107, č. 3 (2011), 032301/1-032301/9. ISSN 0031-9007. E-ISSN 1079-7114
R&D Projects: GA MŠMT LC07048
Institutional research plan: CEZ:AV0Z10480505; CEZ:AV0Z10100521
Keywords : RELATIVISTIC NUCLEAR COLLISIONS * ELLIPTIC FLOW * ENERGY
Subject RIV: BF - Elementary Particles and High Energy Physics; BF - Elementary Particles and High Energy Physics (FZU-D)
Impact factor: 7.370, year: 2011

We report on the first measurement of the triangular nu(3), quadrangular nu(4), and pentagonal nu(5) charged particle flow in Pb-Pb collisions at root s(NN) = 2.76 TeV measured with the ALICE detector at the CERN Large Hadron Collider. We show that the triangular flow can be described in terms of the initial spatial anisotropy and its fluctuations, which provides strong constraints on its origin. In the most central events, where the elliptic flow nu(2) and nu(3) have similar magnitude, a double peaked structure in the two-particle azimuthal correlations is observed, which is often interpreted as a Mach cone response to fast partons. We show that this structure can be naturally explained from the measured anisotropic flow Fourier coefficients.
Permanent Link: http://hdl.handle.net/11104/0209080