Scaling properties in bulk and p${}_{\mathrm{T}}$-dependent particle production near midrapidity in relativistic heavy ion collisions

Abstract

The centrality dependence of the midrapidity charged-particle multiplicity density ($|\eta |$$<$1) is presented for Au+Au and Cu+Cu collisions at RHIC over a broad range of collision energies. The multiplicity measured in the Cu+Cu system is found to be similar to that measured in the Au+Au system, for an equivalent N${}_{\mathrm{part}}$, with the observed factorization in energy and centrality still persistent in the smaller Cu+Cu system. The extent of the similarities observed for bulk particle production is tested by a comparative analysis of the inclusive transverse momentum distributions for Au+Au and Cu+Cu collisions near midrapidity. It is found that, within the uncertainties of the data, the ratio of yields between the various energies for both Au+Au and Cu+Cu systems are similar and constant with centrality, both in the bulk yields as well as a function of p${}_{\mathrm{T}}$, up to at least 4 GeV/$c$. The effects of multiple nucleon collisions that strongly increase with centrality and energy appear to only play a minor role in bulk and intermediate transverse momentum particle production.

arXiv commentSubmitted for publication in Phys. Rev. C, 5 pages, 3 figures

References in corpus (14)

• The PHOBOS Perspective on Discoveries at RHIC
• HIJING 1.0: A Monte Carlo Program for Parton and Particle Production in High Energy Hadronic and Nuclear Collisions
• Hadron production in nuclear collisions at RHIC and high density QCD
• A Multi-Phase Transport model for nuclear collisions at RHIC
• Energy dependence of charged pion, proton and anti-proton transverse momentum spectra for Au+Au collisions at \sqrt{s_NN} = 62.4 and 200 GeV
• Centrality Dependence of the Charged Particle Multiplicity near Mid-Rapidity in Au+Au Collisions at sqrt(s_NN) = 130 and 200 GeV
• Charged hadron transverse momentum distributions in Au+Au collisions at sqrt(s_NN) = 200 GeV
• Energy dependence of particle multiplicities in central Au+Au collisions
• Collision geometry scaling of Au+Au pseudorapidity density from sqrt(s_NN) = 19.6 to 200 GeV
• Charged-Particle Pseudorapidity Distributions in Au+Au Collisions at sqrt(s_NN)=62.4 GeV
• Centrality dependence of charged hadron transverse momentum spectra in Au+Au collisions from sqrt(s_NN) = 62.4 to 200 GeV
• System size and centrality dependence of charged hadron transverse momentum spectra in Au+Au and Cu+Cu collisions at sqrt(s) = 62.4 and 200 GeV
• System Size, Energy and Centrality Dependence of Pseudorapidity Distributions of Charged Particles in Relativistic Heavy Ion Collisions
• Vertex Reconstruction Using a Single Layer Silicon Detector

Cited by in corpus (13)

• 200 A GeV Au+Au collisions serve a nearly perfect quark-gluon liquid
• Radial and elliptic flow in Pb+Pb collisions at the Large Hadron Collider from viscous hydrodynamic
• Elliptic flow in 200 A GeV Au+Au collisions and 2.76 A TeV Pb+Pb collisions: insights from viscous hydrodynamics + hadron cascade hybrid model
• Hadron spectra and elliptic flow for 200 A GeV Au+Au collisions from viscous hydrodynamics coupled to a Boltzmann cascade
• Relating multihadron production in hadronic and nuclear collisions
• Collision Energy Dependence of Viscous Hydrodynamic Flow in Relativistic Heavy-Ion Collisions
• Centrality evolution of the charged-particle pseudorapidity density over a broad pseudorapidity range in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Evolution of pi^0 suppression in Au+Au collisions from sqrt(s_NN) = 39 to 200 GeV
• Dissecting the role of initial collision geometry for jet quenching observables in relativistic heavy ion collisions
• Core - Corona Model describes the Centrality Dependence of v_2/epsilon
• Lessons from PHOBOS
• Energy and centrality dependence of particle multiplicity in heavy ion collisions from $\sqrt{s_{{}_{NN}}}$ = 20 to 2760 GeV
• Study of charged particle production in $U$-$U$ collisions in a Wounded Quark Model