Abstract
Differential elliptic flow () for mesons and (anti)deuterons is measured for collisions at . The for mesons follows the trend of lighter and mesons, suggesting that ordinary hadrons interacting with standard hadronic cross sections are not the primary driver for elliptic flow development. The values for suggest that elliptic flow is additive for composite particles. This further validation of the universal scaling of per constituent quark for baryons and mesons suggests that partonic collectivity dominates the transverse expansion dynamics.
- Received 14 March 2007
DOI:https://doi.org/10.1103/PhysRevLett.99.052301
©2007 American Physical Society