Azimuthal anisotropy of pi(0) production in Au plus Au collisions at root s(NN)=200 GeV: Path-length dependence of jet quenching and the role of initial geometry

0356725 - FZÚ 2011 RIV US eng J - Journal Article
Adare, A. - Afanasiev, S. - Aidala, C. - Mašek, L. - Mikeš, P. - Růžička, Pavel - Tomášek, Lukáš - Vrba, Václav
Azimuthal anisotropy of pi(0) production in Au plus Au collisions at root s(NN)=200 GeV: Path-length dependence of jet quenching and the role of initial geometry.
Physical Review Letters. Roč. 105, č. 14 (2010), 142301/1-142301/7. ISSN 0031-9007. E-ISSN 1079-7114
R&D Projects: GA MŠMT LA08015
Institutional research plan: CEZ:AV0Z10100502
Keywords : PHENIX * azimuthal anisotropy
Subject RIV: BF - Elementary Particles and High Energy Physics
Impact factor: 7.621, year: 2010
http://arxiv.org/pdf/1006.3740

We have measured the azimuthal anisotropy of Pi0 production for 1 < pT < 18 GeV/c for Au+Au collisions at psNN = 200 GeV. The observed anisotropy shows a gradual decrease for 3 less than or similar to p(T) less than or similar to 7-10 GeV/c, but remains positive beyond 10 GeV/c. The magnitude of this anisotropy is underpredicted, up to at least similar to 10 GeV/c, by current perturbative QCD (PQCD) energy-loss model calculations.
Permanent Link: http://hdl.handle.net/11104/0195172