Skip to Main content Skip to Navigation
Journal articles

Is the centrality dependence of the elliptic flow $v_2$ and of the average $$ in RHIC experiments more than a Core-Corona Effect?

Abstract : Recently we have shown that the centrality dependence of the multiplicity of different hadron species observed in RHIC and SPS experiments can be well understood in a simple model, dubbed core-corona model. There it is assumed that those incoming nucleons which scatter only once produce hadrons as in pp collisions whereas those which scatter more often form an equilibrated source which decays according to phase space. In this article we show that also kinematical variables like $v_2/\epsilon_{part} (N_{part})$ as well as $v_2^i/\epsilon_{part} (N_{part})$ and $$ of identified particles are well described in this model. The correlation of $$ between peripheral heavy ion collisions and pp collisions for different hadrons, reproduced in this model, questions whether hydrodynamical calculations are the proper tool to describe non-central heavy ion collision. The model explains as well the centrality dependence of $v_2/\epsilon_{part}$ of charged particles, considered up to now as an observable which allows to determine the viscosity of the quark gluon plasma. The observed dependence of $v_2^i/\epsilon_{part}(N_{part})$ on the particle species is a simple consequence of the different ratios of core to corona particles.
Document type :
Journal articles
Complete list of metadatas

http://hal.in2p3.fr/in2p3-00508538
Contributor : Dominique Girod <>
Submitted on : Wednesday, August 4, 2010 - 1:31:31 PM
Last modification on : Friday, January 3, 2020 - 4:30:07 PM

Links full text

Identifiers

Citation

Jörg Aichelin, Klaus Werner. Is the centrality dependence of the elliptic flow $v_2$ and of the average $$ in RHIC experiments more than a Core-Corona Effect?. Physical Review C, American Physical Society, 2010, 82, pp.034906. ⟨10.1103/PhysRevC.82.034906⟩. ⟨in2p3-00508538⟩

Share

Metrics

Record views

319