J. Lauret

Elliptic flow: Transition from out-of-plane to in-plane emission in Au + Au collisions

We have measured the proton elliptic flow excitation function for the Au + Au system spanning the beam energy range 2 -- 8 AGeV. The excitation function shows a transition from negative to positive elliptic flow at a beam energy,

Azimuthal dependence of pion interferometry at the AGS

E_{tr} sim

Comparison of source images for protons, pi-'s, and lambda's in 6A GeV Au+Au collisions.

4 AGeV. Detailed comparisons with calculations from a relativistic Boltzmann-equation are presented. The comparisons suggest a softening of the nuclear equation of state (EOS) from a stiff form (K sim 380 MeV) at low beam energies (E_{Beam} le 2 AGeV) to a softer form (K sim 210 MeV) at higher energies (E_{Beam} ge

Centrality and momentum-selected elliptic flow: Tighter constraints for the nuclear equation of state

4 AGeV) where the calculated baryon density

PHENIX on-line and off-line computing

rho sim 4 rho_0

High-order azimuthal correlation functions: powerful probes for collective motion in heavy ion reactions

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Comparison of source images for protons, [formula presented]’s, and [formula presented]’s in [formula presented] [formula presented] collisions

Abstract Two-pion correlation functions, measured as a function of azimuthal emission angle with respect to the reaction plane, provide novel information on the anisotropic shape and orientation of the pion-emitting zone formed in heavy ion collisions. We present the first experimental determination of this information, for semi-central Au + Au collisions at 2–6xa0 A GeV. The source extension perpendicular to the reaction plane is greater than the extension in the plane, and tilt of the pion source in coordinate space is found to be opposite its tilt in momentum space.

Neutral strange particle dynamics in Au + Au collisions at AGS energies

Source images are extracted from two-particle correlations constructed from strange and nonstrange hadrons produced in 6A GeV Au+Au collisions. Very different source images result from pp vs p Lambda vs pi(-)pi(-) correlations. Scaling by transverse mass can describe the apparent source size ratio for p/pi(-) but not for Lambda/pi(-) or Lambda/p. These observations suggest important differences in the space-time emission histories for protons, pions, and neutral strange baryons produced in the same events.

Λ flow and Λ-P correlation in Au + Au collisions at AGS energies

Proton elliptic flow is studied as a function of impact-parameter

The Bombarding Energy Dependence of π- Inteferometry at the Ags

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