Transverse Momentum Spectra in Au+Au and d+Au Collisions at $\sqrt{s_{NN}}$=200 GeV and the Pseudorapidity Dependence of High p${}_T$ Suppression

Abstract

We present spectra of charged hadrons from Au+Au and d+Au collisions at $\sqrt{s_{NN}}=200$ GeV measured with the BRAHMS experiment at RHIC. The spectra for different collision centralities are compared to spectra from $\mathrm{p}+\bar{\mathrm{p}}$ collisions at the same energy scaled by the number of binary collisions. The resulting ratios (nuclear modification factors) for central Au+Au collisions at $\eta =0$ and $\eta =2.2$ evidence a strong suppression in the high $p_T$ region ($>$2 GeV/c). In contrast, the d+Au nuclear modification factor (at $\eta =0$) exhibits an enhancement of the high $p_T$ yields. These measurements indicate a high energy loss of the high $p_T$ particles in the medium created in the central Au+Au collisions. The lack of suppression in d+Au collisions makes it unlikely that initial state effects can explain the suppression in the central Au+Au collisions.

4 pages, 4 figures, submitted to Phys. Rev. Lett

References in corpus (12)

• Evidence from d+Au measurements for final-state suppression of high $p_T$ hadrons in Au+Au collisions at RHIC
• Centrality dependence of high pT hadron suppression in Au+Au collisions at sqrt(sNN)=130 GeV
• Absence of Suppression in Particle Production at Large Transverse Momentum in sqrt(s_NN) = 200 GeV d+Au Collisions
• Parton saturation and N_part scaling of semi--hard processes in QCD
• Pseudorapidity distributions of charged particles from Au+Au collisions at the maximum RHIC energy, Sqrt(s_NN) = 200 GeV
• Centrality dependence of charged hadron transverse momentum spectra in d+Au collisions at sqrt(s_NN) = 200 GeV
• Charged particle densities from Au+Au collisions at sqrt{s_{NN}}=130 GeV
• Energy dependence of particle multiplicities in central Au+Au collisions
• Rapidity Dependence of Charged Antiparticle-to-Particle Ratios in Au+Au Collisions at $\sqrt{s_{NN}}=200$ GeV
• Initial State Parton Broadening and Energy Loss Probed in d+Au at RHIC
• Quenching of High pT Hadron Spectra by Hadronic Interactions in Heavy Ion Collisions at RHIC
• Interplay of soft and hard processes and hadron $p_T$ spectra in $pA$ and $AA$ collisions

Cited by in corpus (216)

• Experimental and Theoretical Challenges in the Search for the Quark Gluon Plasma: The STAR Collaboration's Critical Assessment of the Evidence from RHIC Collisions
• Formation of dense partonic matter in relativistic nucleus-nucleus collisions at RHIC: Experimental evaluation by the PHENIX collaboration
• Quark Gluon Plasma an Color Glass Condensate at RHIC? The perspective from the BRAHMS experiment
• The PHOBOS Perspective on Discoveries at RHIC
• New Forms of QCD Matter Discovered at RHIC
• Evidence from d+Au measurements for final-state suppression of high $p_T$ hadrons in Au+Au collisions at RHIC
• Azimuthal anisotropy in Au+Au collisions at sqrtsNN = 200 GeV
• Distributions of Charged Hadrons Associated with High Transverse Momentum Particles in pp and Au+Au Collisions at sqrt(s_NN)=200 GeV
• Saturation Physics and Deuteron--Gold Collisions at RHIC
• Evolution of the nuclear modification factors with rapidity and centrality in d+Au collisions at $\sqrt{s_{NN}} = 200 GeV
• Cronin Effect and High-p_T Suppression in pA Collisions
• Heavy Quark Radiative Energy Loss in QCD Matter
• Hydrodynamic Models for Heavy Ion Collisions
• Nuclear Modification of Electron Spectra and Implications for Heavy Quark Energy Loss in Au+Au Collisions at sqrt(s_NN)=200 GeV
• Medium-Induced Gluon Radiation off Massive Quarks Fills the Dead Cone
• Identified baryon and meson distributions at large transverse momenta from Au+Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Observable implications of geometrical and dynamical aspects of freeze-out in heavy ion collisions
• Wilson loops in heavy ion collisions and their calculation in AdS/CFT
• Small System Collectivity in Relativistic Hadron and Nuclear Collisions
• High-p_T Charged Hadron Suppression in Au+Au Collisions at sqrt(s_NN) = 200 GeV
• Jet size dependence of single jet suppression in lead-lead collisions at sqrt(s(NN)) = 2.76 TeV with the ATLAS detector at the LHC
• The Fragility of High-pT Hadron Spectra as a Hard Probe
• Energy Loss of Charm Quarks in the Quark-Gluon Plasma: Collisional vs Radiative
• Centrality dependence of charged hadron transverse momentum spectra in d+Au collisions at sqrt(s_NN) = 200 GeV
• Testing the Color Charge and Mass Dependence of Parton Energy Loss with Heavy-to-light Ratios at RHIC and LHC
• Transverse momentum distribution and nuclear modification factor of charged particles in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Measurements of the Nuclear Modification Factor for Jets in Pb+Pb Collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV with the ATLAS Detector
• Minijet deformation and charge-independent angular correlations on momentum subspace $(\eta ,\varphi )$ in Au-Au collisions at $\sqrt{s_{NN}}$ = 130 GeV
• Centrality and pseudorapidity dependence of elliptic flow for charged hadrons in Au+Au collisions at sqrt(sNN) = 200 GeV
• Energy Loss of Leading Partons in a Thermal QCD Medium
• Multi-strange baryon elliptic flow in Au+Au collisions at sqrt(s_NN)= 200 GeV
• Measurement of jet suppression in central Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Energy Dependence of the Cronin Effect from Non-Linear QCD Evolution
• Strangeness dynamics and transverse pressure in relativistic nucleus-nucleus collisions
• Forward Neutral Pion Production in p+p and d+Au Collisions at sqrt(s_NN)=200 GeV
• Pion, kaon, proton and anti-proton transverse momentum distributions from p+p and d+Au collisions at $\sqrt{s_{NN}}=200$ GeV
• Transverse Momentum Broadening and the Jet Quenching Parameter, Redux
• Measurement of charged jet suppression in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV
• Enhanced strange baryon production in Au+Au collisions compared to p+p at sqrts = 200 GeV
• Hydrodynamic afterburner for the Color Glass Condensate and the parton energy loss
• A lattice study of the jet quenching parameter
• Experimental overview on small collision systems at the LHC
• Measurement of the splitting function in pp and PbPb collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}=$ 5.02 TeV
• Collision geometry scaling of Au+Au pseudorapidity density from sqrt(s_NN) = 19.6 to 200 GeV
• A Detailed Study of High-pT Neutral Pion Suppression and Azimuthal Anisotropy in Au+Au Collisions at \sqrt{s_{NN}} = 200 GeV
• Saturation and parton level Cronin effect: enhancement vs suppression of gluon production in p-A and A-A collisions
• Azimuthal anisotropy of charged particles with transverse momentum up to 100 GeV in PbPb collisions at sqrt(s[NN]) = 5.02 TeV
• Identified hadron compositions in p+p and Au+Au collisions at high transverse momenta at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Measurement of Jet Modification at RHIC
• Phase structures of strong coupling lattice QCD with finite baryon and isospin density
• Jet Properties from Dihadron Correlations in p+p Collisions at sqrt(s)=200 GeV
• The Cronin Effect, Quantum Evolution and the Color Glass Condensate
• Interplay between soft and hard hadronic components for identified hadrons in relativistic heavy ion collisions
• RHIC-tested predictions for low-$p_T$ and high-$p_T$ hadron spectra in nearly central Pb+Pb collisions at the LHC
• Low-pT Collective Flow Induces High-pT Jet Quenching
• Production of Mesons and Baryons at High Rapidity and High Pt in Proton-Proton Collisions at sqrt(s) = 200 GeV
• Open and hidden charm in proton-nucleus and heavy-ion collisions
• First measurement of jet mass in Pb-Pb and p-Pb collisions at the LHC
• The smallest fluid on earth
• Measurement of charged jet production cross sections and nuclear modification in p-Pb collisions at $\sqrt{s_\rm{NN}} = 5.02$ TeV
• Jet hadrochemistry as a characteristics of jet quenching
• Baryon Stopping and the Valence Quark Distribution at Small x
• Suppression of high transverse momentum hadrons at RHIC by (pre-) hadronic final state interactions
• Nuclear effects on the transverse momentum spectra of charged particles in pPb collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV
• Transverse momentum, rapidity, and centrality dependence of inclusive charged-particle production in $\sqrt{s_{NN}}=5.02$ TeV p+Pb collisions measured by the ATLAS experiment
• Cronin effect and high-p_T suppression in the nuclear gluon distribution at small x
• Saturation physics at HERA and RHIC: An unified description
• Revisiting scaling properties of medium-induced gluon radiation
• The multiplicity dependence of inclusive $p_t$ spectra from p-p collisions at $\sqrt{s}$ = 200 GeV
• Indications of suppressed high p_T hadron production in nucleus-nucleus collisions at CERN-SPS
• Momentum Broadening in Weakly Coupled Quark-Gluon Plasma (with a view to finding the quasiparticles within liquid quark-gluon plasma)
• Modified Hagedorn formula including temperature fluctuation - Estimation of temperatures at RHIC experiments -
• Centrality dependence of charged hadron transverse momentum spectra in Au+Au collisions from sqrt(s_NN) = 62.4 to 200 GeV
• Medium induced jet absorption at relativistic heavy ion collisions
• Open charm production in heavy ion collisions and the Color Glass Condensate
• Heavy quark production by a quasi-classical color field in proton-nucleus collisions
• Saturation and shadowing in high-energy proton-nucleus dilepton production
• Predicting parton energy loss in small collision systems
• Two Particle Correlations at Forward Rapidity in STAR
• Jet tomography
• Centrality dependence of charged-particle pseudorapidity distributions from d+Au collisions at sqrt(s_{NN})=200 GeV
• Energy Dependence of Jet Quenching and Life-time of the Dense Matter in High-energy Heavy-ion Collisions
• Measurement of the groomed jet mass in PbPb and pp collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}=$ 5.02 TeV
• Medium modification of jet fragmentation in Au+Au collisions at sqrt(s_NN)=200 GeV measured in direct photon-hadron correlations
• Measurement of identified pi^0 and inclusive photon v_2 and implication to the direct photon production in sqrt(s_NN) = 200 GeV Au+Au collisions
• Multiple parton interactions and forward double pion production in pp and dA scattering
• Transverse momentum diffusion and broadening of the back-to-back di-hadron correlation function
• 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
• Rapid hydrodynamic expansion in relativistic heavy-ion collisions
• Inclusive pi^0, eta, and direct photon production at high transverse momentum in p+p and d+Au collisions at sqrt(s_NN) = 200 GeV
• Production of q bar-q Pairs in Proton-Nucleus Collisions at High Energies
• Azimuthal anisotropy of charged jet production in $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV Pb-Pb collisions
• Pseudorapidity dependence of charged hadron transverse momentum spectra in d+Au collisions at sqrt sNN = 200 GeV
• Forward Production in d+Au Collisions by Parton Recombination
• The Fluid Nature of Quark-Gluon Plasma
• Analyses of k_t distributions at RHIC by means of some selected statistical and stochastic models
• Scanning the phases of QCD with BRAHMS
• Can Thermalization in Heavy Ion Collisions be Described by QCD Diagrams?
• Universality of the transverse momentum distributions in the framework of percolation of strings
• High transverse momentum suppression and surface effects in Cu+Cu and Au+Au collisions within the PQM model
• Diffusion and local deconfinement in relativistic systems
• Di-Jet Imbalance Measurements at $\sqrt{s_{NN}}=200$ GeV at STAR
• Combining Difficulty Ranking with Multi-Armed Bandits to Sequence Educational Content
• Analysis of the apparent nuclear modification in peripheral Pb-Pb collisions at 5.02 TeV
• Hard Probes in Heavy Ion Collisions at the LHC: Jet Physics
• Deuteron-Nucleus Collisions in a Multi-Phase Transport Model
• Jet quenching at intermediate RHIC energies
• The energy dependence of $p_t$ angular correlations inferred from mean-$p_t$ fluctuation scale dependence in heavy ion collisions at the SPS and RHIC
• Measurement of the radius dependence of charged-particle jet suppression in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Pseudorapidity Asymmetry and Centrality Dependence of Charged Hadron Spectra in d+Au Collisions at $\sqrt{s_{NN}}=200$ GeV
• Transverse Momentum and Rapidity Dependence of HBT Correlations in Au+Au Collisions at sqrt(s_NN) = 62.4 and 200 GeV
• Pseudorapidity dependence of parton energy loss in relativistic heavy ion collisions
• Could saturation effects be visible in a future electron-ion collider?
• The non-Abelian feature of parton energy loss in energy dependence of jet quenching in high-energy heavy-ion collisions
• Relativistic diffusion
• Energy losses in the black disc regime and correlation effects in the STAR forward pion production in dAu collisions
• Identified hadron transverse momentum spectra in Au+Au collisions at sqrt(s_(NN))=62.4 GeV
• Forward gluon production in hadron-hadron scattering with Pomeron loops
• Jet-like correlations with neutral pion triggers in pp and central Pb-Pb collisions at 2.76 TeV
• Neutral Pion Production in Au+Au Collisions at $\sqrt{s_{NN}}$ = 200 GeV
• Shadowing Effects on the Nuclear Suppression Factor, R_dAu, in d+Au Interactions
• Azimuthal Angle Correlations for Rapidity Separated Hadron Pairs in d+Au Collisions at sqrt(s_NN) = 200 GeV
• Constraining the nuclear gluon distribution in $eA$ processes at RHIC
• Centrality-dependent direct photon pt spectra in Au+Au collisions at RHIC
• Heavy-flavor production in heavy-ion collisions and implications for the properties of hot QCD matter
• (medium-modified) Fragmentation Functions
• Evidence for Nonlinear Gluon Effects in QCD and their $A$ Dependence at STAR
• High Pt Hadron Spectra at High Rapidity
• The QGP Discovered at RHIC
• Three-Particle Correlations from Parton Cascades in Au+Au Collisions
• The Mini-Jet Scale and Energy Loss at RHIC in the HIJING and RQMD Models
• Transient field fluctuations effects in d+Au and Au+Au collisions at \sqrt{s_nn} = 200 GeV
• Exploring the QCD landscape with high-energy nuclear collisions
• Charged antiparticle to particle ratios near midrapidity in p+p collisions at sqrt(s_NN)=200 GeV
• New State of Nuclear Matter: Nearly Perfect Fluid of Quarks and Gluons in Heavy Ion Collisions at RHIC Energies
• Probing the Color Glass Condensate in an electron-ion collider
• Relevance of baseline hard proton-proton spectra for high-energy nucleus-nucleus physics
• Predictions for the LHC heavy ion programme
• Recent results from BRAHMS
• Charm and longitudinal structure functions with the Kharzeev-Levin-Nardi model
• Jet quenching by (pre--)hadronic final state interactions at RHIC
• Jet quenching parameters in strongly coupled anisotropic plasmas in the presence of magnetic fields
• Centrality dependence of charged antiparticle to particle ratios near mid-rapidity in d+Au collisions at sqrt(s_NN)=200 GeV
• Probing strongly coupled anisotropic plasmas from higher curvature gravity
• Theoretical Overview Quark Matter '04
• Non-linear equation: energy conservation and impact parameter dependence
• Two-particle correlations on transverse momentum and momentum dissipation in Au-Au collisions at $\sqrt{s_{NN}}$ = 130 GeV
• System size dependence of associated yields in hadron-triggered jets
• Nuclear Modification Factor for Charged Pions and Protons at Forward Rapidity in Central Au+Au Collisions at 200 GeV
• Counting valence quarks at RHIC and LHC
• Thoughts on Non-Perturbative Thermalization and Jet Quenching in Heavy Ion Collisions
• Charm Quark Energy Loss in QCD Matter
• Nuclear modification factor of neutral pions in the forward and backward regions in $p$-Pb collisions
• Pion, kaon, and (anti-)proton production in U+U Collisions at $\sqrt{s_{NN}}$ = 193 GeV measured with the STAR detector
• Baryon Stopping in Proton-Nucleus Collisions
• Measurement of jet radial profiles in Pb$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• High-pT Spectra of Charged Hadrons in Au+Au Collisions at sqrt s_(NN)=9.2 GeV in STAR
• Distributions of Charged Hadrons Associated with High pT Particles
• Medium-induced gluon radiation and jet quenching in heavy ion collisions
• CGC, Hydrodynamics, and the Parton Energy Loss
• Jets as a Probe of Dense Matter at RHIC
• Centrality and pseudorapidity dependence of charged hadron production at intermediate p_T in Au + Au collisions at sqrt(s_NN) = 130 GeV
• Dihadron correlations at high pT
• Hydrodynamic afterburner for the CGC at RHIC
• On a Wilson lines approach to the study of jet quenching
• The New Physics at RHIC. From Transparency to High p${}_t$ Suppression
• Cronin effect and energy conservation constraints in high energy proton-nucleus collisions
• High pt Measurements at the CERN SPS
• From EMC- and Cronin-effects to signals of quark-gluon plasma
• QCD motivated approach to soft interactions at high energies: nucleus-nucleus and hadron-nucleus collisions
• RHIC results from LHC perspectives
• Testing universality of the Color Glass Condensate descriptions
• STAR Results on High Transverse Momentum, Heavy Flavor and Electromagnetic Probes
• Bose-Einstein Interference in the Passage of a Jet in a Dense Medium
• Initial-state nuclear effects in proton-nucleus collisions
• CGC, QCD Saturation and RHIC data (Kharzeev-Levin-McLerran-Nardi point of view)
• Nonlinear dynamics of soft boson collective excitations in hot QCD plasma III: bremsstrahlung and energy losses
• Jet Transport Coefficient at the Large Hadron Collider Energies in a Color String Percolation Approach
• Jet fragmentation transverse momentum distributions in pp and p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Estimations of ${\bar{\Omega }}^{+}/{\Omega }^{-}$ at RHIC from a QGP Model with Diquarks
• Investigating the broadening phenomenon in two-particle correlations induced by gluon saturation
• Fermi motion and nuclear modification factor
• Identified Hadron Spectra From pp, dA and AA collisions
• Production and energy loss of strange and heavy quarks
• Has the Quark-Gluon Plasma been seen?
• Relativistic Nuclear Collisions and the QCD Phase Boundary
• Forward-backward elliptic anisotropy correlation in parton cascade
• D meson production in d+Au process using a perturbative approach
• Jet quenching in relativistic heavy ion collisions
• Transverse Spectra of Hadrons in Central $AA$ Collisions at RHIC and LHC from pQCD+Saturation+Hydrodynamics and from pQCD+Energy Losses
• Suppression of High Transverse Momentum ${\pi }^0$ Spectra in Au+Au Collisions at RHIC
• Heavy quark production in Color Glass Condensate
• On the Nuclear Modification Factor at RHIC and LHC
• High pT hadron spectra at RHIC: an overview
• Small-x Physics with the ALICE experiment at the CERN-LHC
• Jet Physics at the LHC in ALICE
• Jet measurements in the ALICE experiment at the LHC
• Open heavy flavor measurements with the PHENIX experiment at RHIC
• From Leading Hadron Suppression to Jet Quenching at RHIC and at the LHC
• RHIC physics overview
• Exploring QCD with Heavy Ion Collisions
• Comparing parton energy loss models
• Cronin effect and high-p_T suppression from the Color Glass Condensate
• Elliptical Flow in Relativistic Ion Collisions at s^(1/2)= 200 A GeV
• Measurements of jet quenching and heavy flavor production with the ATLAS detector
• Direct photons in d+Au collisions at s_(NN)**(1/2)=200GeV with STAR
• Search for jet quenching effects on the plain jet mass in Pb+Pb collisions at the LHC with a multiphase transport model
• Novel Bose-Einstein Interference in the Passage of a Fast Particle in a Dense Medium
• Recent Results from the BRAHMS Experiment
• Jet correlation measurement in heavy-ion collisions: from RHIC to LHC
• Particle distribution and nuclear stopping in Au-Au collisions at $\sqrt{s_{NN}}$=200 GeV
• Study on the method of mini-jet identification in relativistic heavy ion collisions
• BRAHMS Overview
• Large transverse momentum suppression at RHIC: Shadowing and absorption
• Nucleon-Gold Collisions at 200 AGeV Using Tagged d+Au Interactions in PHOBOS
• Where Does the Energy Loss Lose Strength?