Coalescence Models For Hadron Formation From Quark Gluon Plasma

Abstract

We review hadron formation from a deconfined quark gluon plasma (QGP) via coalescence or recombination of quarks and gluons. We discuss the abundant experimental evidence for coalescence from the Relativistic Heavy Ion Collider (RHIC) and compare the various coalescence models advocated in the literature. We comment on the underlying assumptions and remaining challenges as well as the merits of the models. We conclude with a discussion of some recent developments in the field.

Review to appear in Annu. Rev. Nucl. Part. Sci. 58; 58 pages, 13 figures, 1 table

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• Scaling Distributions of Quarks, Mesons and Proton for all $p_T$, Energy and Centrality
• Baryon Number Transport via Gluonic Junctions
• Interplay between soft and hard hadronic components for identified hadrons in relativistic heavy ion collisions
• Asymmetries between the production of D+ and D- mesons from 500 GeV/c pi- nucleon interactions as a function of xF and pt**2
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• v4: A small, but sensitive observable for heavy ion collisions
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• Effect of resonance decays on hadron elliptic flows
• Jet Structure of Baryon Excess in Au+Au Collisions at sqrt(s_NN) = 200 GeV
• The Leading Particle Effect from Heavy-Quark Recombination
• Final-State Interaction as the Origin of the Cronin Effect
• Correlated Emission of Hadrons from Recombination of Correlated Partons
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• Entropy Production at RHIC
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• Recombination Models
• Elliptic flow of resonances at RHIC: probing final state interactions and the structure of resonances
• D-Meson Production from Recombination in Hadronic Collisions
• Particle dependence of elliptic flow in Au+Au collisions at $\sqrt{s_{NN}}=$ 200 GeV
• Thermal Recombination: Beyond the Valence Quark Approximation
• Heavy Ions at LHC: Theoretical Issues
• Effective degrees of freedom of the Quark-Gluon Plasma
• Suppression of Non-photonic Electrons from Enhancement of Charm Baryons in Heavy Ion Collisions
• Quark coalescence in the mid rapidity region at RHIC
• Charge fluctuations in a quark-antiquark system
• Possible Resolutions of the D-Paradox
• In-Plane Elliptic Flow of Resonance Particles in Relativistic Heavy-Ion Collisions
• Hadronization in heavy ion collisions: recombination or fragmentation?
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• Properties of quark matter produced in heavy ion collision
• Dihadron Correlation in Jets Produced in Heavy-Ion Collisions
• Jet Correlations of Identified Particles in PHENIX
• Entropy of expanding QCD matter
• Modified Fragmentation Function from Quark Recombination
• Identified Particle Spectra and Jet Interactions with the Medium
• Particle correlations at RHIC from parton coalescence dynamics -- first results
• Phase-Space Coalescence for heavy and light quarks at RHIC
• Hadron Correlations from Recombination and Fragmentation
• Energy dependence of transverse quark flow in heavy ion collisions
• Evidence from Identified Particles for Active Quark and Gluon Degrees of Freedom
• Faces of quark matter
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