Phobos results on charged particle multiplicity and pseudorapidity distributions in Au+Au, Cu+Cu, d+Au, and p+p collisions at ultra-relativistic energies

Abstract

Pseudorapidity distributions of charged particles emitted in $Au+Au$, $Cu+Cu$, $d+Au$, and $p+p$ collisions over a wide energy range have been measured using the PHOBOS detector at RHIC. The centrality dependence of both the charged particle distributions and the multiplicity at midrapidity were measured. Pseudorapidity distributions of charged particles emitted with $|\eta |<5.4$, which account for between 95% and 99% of the total charged-particle emission associated with collision participants, are presented for different collision centralities. Both the midrapidity density, $d{N}_{ch}/d\eta$, and the total charged-particle multiplicity, $N_{ch}$, are found to factorize into a product of independent functions of collision energy, $\sqrt{s_{{}_{NN}}}$, and centrality given in terms of the number of nucleons participating in the collision, $N_{part}$. The total charged particle multiplicity, observed in these experiments and those at lower energies, assumes a linear dependence of $(\ln s_{{}_{NN}}{)}^2$ over the full range of collision energy of $\sqrt{s_{{}_{NN}}}$=2.7-200 GeV.

25 pages, 29 figures, 8 tables

References in corpus (32)

• Quark Gluon Plasma an Color Glass Condensate at RHIC? The perspective from the BRAHMS experiment
• 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
• Energy Dependence of Pion and Kaon Production in Central Pb+Pb Collisions
• Transverse-momentum and pseudorapidity distributions of charged hadrons in pp collisions at sqrt(s) = 7 TeV
• Manifestations of high density QCD in the first RHIC data
• Flavor Production in Pb(160AGeV) on Pb Collisions: Effect of Color Ropes and Hadronic Rescattering
• The significance of the fragmentation region in ultrarelativistic heavy ion collisions
• Transverse momentum and pseudorapidity distributions of charged hadrons in pp collisions at sqrt(s) = 0.9 and 2.36 TeV
• pQCD-based Approach to Parton Production and Equilibration in High-Energy Nuclear Collisions
• Centrality Dependence of Charged Particle Multiplicity in Au-Au Collisions at sqrt(s_NN)=130 GeV
• Charged particle multiplicity near mid-rapidity in central Au+Au collisions at $\sqrt{s}=$ 56 and 130 AGeV
• Charged-particle multiplicity measurement in proton-proton collisions at $\sqrt{s}$ = 0.9 and 2.36 TeV with ALICE at LHC
• Multiplicity distribution and spectra of negatively charged hadrons in Au+Au collisions at sqrt(s_nn) = 130 GeV
• Event-by-event physics in relativistic heavy ion collisions
• Charged-particle pseudorapidity density distributions from Au+Au collisions at sqrt(sNN)=130 GeV
• Centrality Dependence of the Charged Particle Multiplicity near Mid-Rapidity in Au+Au Collisions at sqrt(s_NN) = 130 and 200 GeV
• Charged Pion Production in 2 to 8 AGeV Central Au+Au Collisions
• An Excitation Function of K${}^{-}$ and K${}^{+}$ Production in Au+Au Reactions at the AGS
• Energy dependence of particle multiplicities in central Au+Au collisions
• Energy dependence of elliptic flow over a large pseudorapidity range in Au+Au collisions at RHIC
• Collision geometry scaling of Au+Au pseudorapidity density from sqrt(s_NN) = 19.6 to 200 GeV
• Pseudorapidity Distribution of Charged Particles in d + Au Collisions at $\sqrt{s_{_{NN}}$ = 200 GeV
• Scaling of Charged Particle Production in d+Au Collisions at sqrt(s_NN) = 200 GeV
• Charged-Particle Pseudorapidity Distributions in Au+Au Collisions at sqrt(s_NN)=62.4 GeV
• Centrality Dependence of Charged Particle Multiplicity at Mid-Rapidity in Au+Au Collisions at sqrt(s_NN) = 130 GeV
• System Size, Energy and Centrality Dependence of Pseudorapidity Distributions of Charged Particles in Relativistic Heavy Ion Collisions
• Silicon Pad Detectors for the PHOBOS Experiment at RHIC
• High p_T hadron spectra in high-energy heavy-ion collisions
• Vertex Reconstruction Using a Single Layer Silicon Detector
• Studies of multiplicity in relativistic heavy-ion collisions
• Vertex reconstruction algorithms in the PHOBOS experiment at RHIC

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