Elliptic flow: transition from out-of-plane to in-plane emissionin Au + Au collisions
Journal Article
·
· Physical Review Letters
OSTI ID:893738
We have measured the proton elliptic flow excitation function for the Au+Au system spanning the beam energy range (2-8)A GeV. The excitation function shows a transition from negative to positive elliptic flow at a beam energy, Etr {approx} 4A GeV. Detailed comparisons with calculations from a relativistic Boltzmann equation are presented. The comparisons suggest a softening of the nuclear equation of state from a stiff form (K {approx} 380 MeV) at low beam energies (Ebeam < 2A GeV) to a softer form (K {approx} 210 MeV) at higher energies ( Ebeam < 4A GeV) where the calculated baryon density rho {approx} 4 rho 0.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Director, Office of Science. Office of High Energy andNuclear Physics
- DOE Contract Number:
- DE-AC02-05CH11231
- OSTI ID:
- 893738
- Report Number(s):
- LBNL-44086; PRLTAO; R&D Project: 464301; TRN: US0606076
- Journal Information:
- Physical Review Letters, Vol. 83, Issue 73; Related Information: Journal Publication Date: 1999; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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