Mach Cones and Hydrodynamic Flow: Probing Big Bang Matter in the Laboratory

Abstract

A critical discussion of the present signals for the phase transition to quark-gluon plasma (QGP) is given. Since hadronic rescattering models predict much larger flow than observed from 1 to 50 A GeV laboratory bombarding energies, this observation is interpreted as potential evidence for a first-order phase transition at high baryon density. A detailed discussion of the collective flow as a barometer for the equation of state (EoS) of hot dense matter at RHIC follows. Here, hadronic rescattering models can explain < 30 % of the observed elliptic flow v_2 for $p_T>2$ GeV/c. This is interpreted as an evidence for the production of superdense matter at RHIC. The connection of v_2 to jet suppression is examined. A study of Mach shocks generated by fast partonic jets propagating through the QGP is given. The main goal is to take into account different types of collective motion during the formation and evolution of this matter. A significant deformation of Mach shocks in central Au+Au collisions at RHIC and LHC energies as compared to the case of jet propagation in a static medium is predicted. A new hydrodynamical study of jet energy loss is presented.

arXiv comment18 pages, 12 figures, presented at the IWCF 2006, Nov. 21-24, Hangzhou, China

References in corpus (27)

• Reaction Operator Approach to Non-Abelian Energy Loss
• Disappearance of back-to-back high $p_T$ hadron correlations in central Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV
• Evidence from d+Au measurements for final-state suppression of high $p_T$ hadrons in Au+Au collisions at RHIC
• Collective Flow signals the Quark Gluon Plasma
• Chemical and Thermal Freeze-Out Parameters from 1 to 200 A.GeV
• Directed and elliptic flow of charged pions and protons in Pb+Pb collisions at 40 and 158A GeV
• Causal Theories of Dissipative Relativistic Fluid Dynamics for Nuclear 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
• Antiflow of Nucleons at the Softest Point of the EoS
• Third flow component as QGP signal
• Waking the Colored Plasma
• Strangeness dynamics and transverse pressure in relativistic nucleus-nucleus collisions
• The Phase Transition to the Quark-Gluon Plasma and Its Effect on Hydrodynamic Flow
• Mach shocks induced by partonic jets in expanding quark-gluon plasma
• Rapidity Dependence of Charged Antiparticle-to-Particle Ratios in Au+Au Collisions at $\sqrt{s_{NN}}=200$ GeV
• Hadronic observables from SIS to SPS energies - anything strange with strangeness ?
• Directed flow in Au+Au, Xe+CsI and Ni+Ni collisions and the nuclear equation of state
• Transition from in-plane to out-of-plane azimuthal enhancement in Au+Au collisions
• Suppression of high transverse momentum hadrons at RHIC by (pre-) hadronic final state interactions
• Nonequilibrium fluid-dynamics in the early stage of ultrarelativistic heavy-ion collisions
• Baryon flow from SIS to AGS energies
• Differential directed flow in Au+Au collisions
• Differential Flow of Protons in Au+Au Collisions at AGS Energies
• Quenching of high $p_{\perp }$ hadrons by (pre--)hadronic FSI at RHIC
• Dissipative Relativistic Fluid Dynamics for Nuclear Collisions
• On the Observation of Phase Transitions in Collisions of Elementary Matter

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• The thermodynamics for a hadronic gas of fireballs with internal color structures and chiral fields
• Non-linear waves in a Quark Gluon Plasma
• Sound waves and solitons in hot and dense nuclear matter
• The Sound Edge of the Quenching Jets