New precision v2 measurements show NCQ scaling holds for multi-strange hadrons down to 7.7 GeV, supporting partonic origin of elliptic flow with minimal late-stage distortion.
Centrality dependence of charged hadron and strange hadron elliptic flow from sqrt(s_NN) = 200 GeV Au+Au collisions
2 Pith papers cite this work. Polarity classification is still indexing.
2
Pith papers citing it
abstract
We present STAR results on the elliptic flow v_2 of charged hadrons, strange and multi-strange particles from sqrt(s_NN) = 200 GeV Au+Au collisions at RHIC. The detailed study of the centrality dependence of v_2 over a broad transverse momentum range is presented. Comparison of different analysis methods are made in order to estimate systematic uncertainties. In order to discuss the non-flow effect, we have performed the first analysis of v_2 with the Lee-Yang Zero method for K_s^0 and Lambda. In the relatively low p_T region, p_T <= 2 GeV/c, a scaling with m_T - m is observed for identified hadrons in each centrality bin studied. However, we do not observe v_2(p_T) scaled by the participant eccentricity to be independent of centrality. At higher p_T, 2 GeV/c <= p_T <= 6 GeV/c, v_2 scales with quark number for all hadrons studied. For the multi-strange hadron Omega, which does not suffer appreciable hadronic interactions, the values of v_2 are consistent with both m_T -m scaling at low p_T and number-of-quark scaling at intermediate p_T. As a function of collision centrality, an increase of p_T-integrated v_2 scaled by the participant eccentricity has been observed, indicating a stronger collective flow in more central Au+Au collisions.
years
2026 2representative citing papers
UrQMD simulations show pion source radii increasing with collision energy and decreasing with transverse mass, with the Levy index alpha falling at higher energies.
citing papers explorer
-
Elliptic Flow of Multi-strange Hadrons in Au+Au Collisions at $\sqrt{s_{NN}}$ = 7.7-19.6 GeV
New precision v2 measurements show NCQ scaling holds for multi-strange hadrons down to 7.7 GeV, supporting partonic origin of elliptic flow with minimal late-stage distortion.
-
Pion emission source shape in UrQMD Au+Au collisions at STAR energies
UrQMD simulations show pion source radii increasing with collision energy and decreasing with transverse mass, with the Levy index alpha falling at higher energies.