Flow at AGS Energies: A Barometer for High Density Effects?

Abstract

Preliminary data on transverse energy `flow' and event asymmetries reported by the E877(814) collaborations are compared to ARC model calculations for Au+Au at full AGS beam energy. ARC triple differential cross-sections for protons and pions are presented. Proton flow is produced in ARC, with the maximum in-plane momentum about 120 MeV/c. For central events the directed momentum for pions is near zero, consistent with experiment. Pion momentum opposite to the nucleons' is evident in a peripheral sample, however, indicating that this pion `anti-flow' involves absorption by `spectator' matter. `Squeeze-out' of protons in central events at mid-rapidity is suggested by the ARC distributions.

8 pages REVTeX, 4 figures, (2 color included as GIF). Full postscript figures (LARGE) available by request from: [email protected]

References in corpus (3)

• Hydrodynamics near the QCD Phase Transition: Looking for the Longest-Lived Fireball
• Observation of Anisotropic Event Shapes and Transverse Flow in Au+Au Collisions at AGS Energy
• Collective Flow from the Intranuclear Cascade Model

Cited by in corpus (5)

• Examination of directed flow as a signature of the softest point of the equation of state in QCD matter
• Equation of state dependence of directed flow in a microscopic transport model
• The first moment of azimuthal anisotropy in nuclear collisions from AGS to LHC energies
• Beam energy dependence of squeeze-out effect on the directed and elliptic flow in Au+Au collisions at high baryon density region
• Enhancement of elliptic flow can signal a first order phase transition in high energy heavy ion collisions