Is the existence of a softest point in the directed flow excitation function an unambiguous signal for the creation of a quark-gluon plasma?
arXiv:nucl-th/0205069 · doi:10.1016/j.physletb.2005.02.035
Abstract
The excitation function of the in-plane directed flow of nucleons is studied within a non-equilibrium transport approach. It is demonstrated that a local minimum in the excitation function of the directed flow develops, which is not related to a transition into a quark-gluon plasma (QGP) phase. It is a consequence of the dynamical softening of the underlying equation of state, due to the onset of resonance matter and particle production. Thus, the interpretation of this minimum as a 'smoking gun' signature for the creation of a QGP is premature.
arXiv comment4 pages, 2 figures
References in corpus (26)
- Microscopic Models for Ultrarelativistic Heavy Ion Collisions
- Relativistic Hadron-Hadron Collisions in the Ultra-Relativistic Quantum Molecular Dynamics Model (UrQMD)
- Anisotropic transverse flow and the quark-hadron phase transition
- Elliptical flow -- a signature for early pressure in ultrarelativistic nucleus-nucleus collisions
- Relativistic Hydrodynamics for Heavy--Ion Collisions -- I. General Aspects and Expansion into Vacuum
- Signatures of Quark-Gluon-Plasma formation in high energy heavy-ion collisions: A critical review
- Hydrodynamics near the QCD Phase Transition: Looking for the Longest-Lived Fireball
- Highly Sensitive Centrality Dependence of Elliptic Flow -- A Novel Signature of the Phase Transition in QCD
- Antiflow of Nucleons at the Softest Point of the EoS
- Third flow component as QGP signal
- Elliptic Flow and HBT in non-central Nuclear Collisions
- Observation of Anisotropic Event Shapes and Transverse Flow in Au+Au Collisions at AGS Energy
- Directed and Elliptic Flow in 158 GeV/Nucleon Pb + Pb Collisions
- Flow systematics from SIS to SPS energies
- Colour Deconfinement in Nuclear Collisions
- Elliptic flow from a parton cascade
- Relativistic Hydrodynamics for Heavy--Ion Collisions -- II. Compression of Nuclear Matter and the Phase Transition to the Quark--Gluon Plasma
- The Phase Transition to the Quark-Gluon Plasma and Its Effect on Hydrodynamic Flow
- Sideward Flow in Au + Au Collisions Between 2A GeV and 8A GeV
- Anisotropic flow in ultra-relativistic heavy ion collisions
- Hydrodynamics and collective behaviour in relativistic nuclear collisions
- Equation of State, Spectra and Composition of Hot and Dense Infinite Hadronic Matter in a Microscopic Transport Model
- Local equilibrium in heavy ion collisions. Microscopic model versus statistical model analysis
- Hadronic observables from SIS to SPS energies - anything strange with strangeness ?
- The Disappearance of Flow
- The directed flow maximum near c_s=0