Title

System-Size Independence of Directed Flow Measured at the BNL Relativistic Heavy-Ion Collider

Authors

David Grosnick, Valparaiso University
Donald D. Koetke, Valparaiso University
Robert Manweiler, Valparaiso University
Shirvel Stanislaus, Valparaiso University
J. C. Webb, Valparaiso University
et al.

Document Type

Article

Publication Date

12-2008

Abstract

We measure directed flow (v(1)) for charged particles in Au + Au and Cu + Cu collisions at root s(NN) = 200 and 62.4 GeV, as a function of pseudorapidity (eta), transverse momentum (p(t)), and collision centrality, based on data from the STAR experiment. We find that the directed flow depends on the incident energy but, contrary to all available model implementations, not on the size of the colliding system at a given centrality. We extend the validity of the limiting fragmentation concept to v(1) in different collision systems, and investigate possible explanations for the observed sign change in v(1)(p(t)).

Recommended Citation

Grosnick, David; Koetke, Donald D.; Manweiler, Robert; Stanislaus, Shirvel; Webb, J. C.; and et al., "System-Size Independence of Directed Flow Measured at the BNL Relativistic Heavy-Ion Collider" (2008). Physics and Astronomy Faculty Publications. 94.
https://scholar.valpo.edu/phys_astro_fac_pub/94