System size and energy dependence of near-side dihadron correlations

0374422 - ÚJF 2013 RIV US eng J - Journal Article
Agakishiev, G. - Aggarwall, M.M. - Bielčík, Jaroslav - Bielčíková, Jana - Chaloupka, Petr - Chung, Paul - Kapitán, Jan - Rusňák, Jan - Šumbera, Michal - Tlustý, David … Total 357 authors
System size and energy dependence of near-side dihadron correlations.
Physical Review. C. Roč. 85, č. 1 (2012), 014903 /1-014903/16. ISSN 0556-2813
R&D Projects: GA MŠMT LA09013
Institutional research plan: CEZ:AV0Z10480505
Keywords : TRANSVERSE-MOMENTUM DISTRIBUTIONS * NUCLEAR COLLISIONS * AU+AU COLLISIONS
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 3.715, year: 2012

Two-particle azimuthal (Delta phi) and pseudorapidity (Delta eta) correlations using a trigger particle with large transverse momentum (p(T)) in d+Au, Cu+Cu, and Au+Au collisions at root s(NN) = 62.4 GeV and 200 GeV from the STAR experiment at the Relativistic Heavy Ion Collider are presented. The near-side correlation is separated into a jet-like component, narrow in both Delta phi and Delta eta, and the ridge, narrow in Delta phi but broad in Delta eta. Both components are studied as a function of collision centrality, and the jet-like correlation is studied as a function of the trigger and associated p(T). The behavior of the jet-like component is remarkably consistent for different collision systems, suggesting it is produced by fragmentation.
Permanent Link: http://hdl.handle.net/11104/0207348