Energy dependence of pi-zero production in Cu+Cu collisions at sqrt(s_NN) = 22.4, 62.4, and 200 GeV

Abstract

Neutral pion transverse momentum (pT) spectra at mid-rapidity (|y| < 0.35) were measured in Cu+Cu collisions at \sqrt s_NN = 22.4, 62.4, and 200 GeV. Relative to pi -zero yields in p+p collisions scaled by the number of inelastic nucleon-nucleon collisions (Ncoll) at the respective energies, the pi-zero yields for pT \ge 2 GeV/c in central Cu+Cu collisions at 62.4 and 200 GeV are suppressed, whereas an enhancement is observed at 22.4 GeV. A comparison with a jet quenching model suggests that final state parton energy loss dominates in central Cu+Cu collisions at 62.4 GeV and 200 GeV, while the enhancement at 22.4 GeV is consistent with nuclear modifications in the initial state alone.

431 authors from 63 institutions, 7 pages, 3 figures, 2 tables. Submitted to Physical Review Letters. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html

References in corpus (8)

• Glauber Modeling in High Energy Nuclear Collisions
• Inclusive cross section and double helicity asymmetry for π^0 production in p+p collisions at sqrt(s)=200 GeV: Implications for the polarized gluon distribution in the proton
• 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
• Non-Abelian energy loss in cold nuclear matter
• Quantitative Constraints on the Transport Properties of Hot Partonic Matter from Semi-Inclusive Single High Transverse Momentum Pion Suppression in Au+Au collisions at sqrt(s_NN) = 200 GeV
• Testing the theory of QGP-induced energy loss at RHIC and the LHC
• High Transverse Momentum Hadron Spectra at sqrt{s_{NN}}=17.3 GeV, in Pb+Pb and p+p Collisions
• Suppression of High-p_T Neutral Pion Production in Central Pb+Pb Collisions at sqrt{s_NN} = 17.3 GeV Relative to p+C and p+Pb Collisions

Cited by in corpus (46)

• The theory and phenomenology of perturbative QCD based jet quenching
• A light-cone wavefunction approach to open heavy flavor dynamics in QCD matter
• Physics Opportunities of a Fixed-Target Experiment using the LHC Beams
• A theory of jet shapes and cross sections: from hadrons to nuclei
• Angular Dependence of Jet Quenching Indicates Its Strong Enhancement Near the QCD Phase Transition
• $\mathcal{O}({\alpha }_s^3)$ analysis of inclusive jet and di-jet production in heavy ion reactions at the Large Hadron Collider
• Nuclear modification factors of phi mesons in d+Au, Cu+Cu and Au+Au collisions at sqrt(S_NN)=200 GeV
• Neutral pion production at midrapidity in pp and Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Jet quenching
• Evolution of pi^0 suppression in Au+Au collisions from sqrt(s_NN) = 39 to 200 GeV
• Production of omega mesons in p+p, d+Au, Cu+Cu, and Au+Au collisions at sqrt(s_NN)=200 GeV
• Disentangle contributions to small-system collectivity via scans of light nucleus-nucleus collisions
• Measurement of $K_S^0$ and $K^{\ast 0}$ in $p$$+$$p$, $d$$+$Au, and Cu$+$Cu collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Jet quenching test of the QCD matter created at RHIC and the LHC needs opacity-resummed medium induced radiation
• Centrality, Rapidity and Transverse-Momentum Dependence of Cold Nuclear Matter Effects on J/Psi Production in d+Au, Cu+Cu and Au+Au Collisions at sqrt(s_NN)=200 GeV
• Charged-particle nuclear modification factors in XeXe collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.44 TeV
• Particle production in relativistic $pp$($\overline{p}$) and $AA$ collisions at RHIC and LHC energies with Tsallis statistics using the two-cylindrical multisource thermal model
• Light and heavy flavor dijet production and dijet mass modification in heavy ion collisions
• System-size dependence of open-heavy-flavor production in nucleus-nucleus collisions at $\sqrt{s_{{}_{NN}}}$=200 GeV
• Scaling properties of fractional momentum loss of high-pT hadrons in nucleus-nucleus collisions at $\sqrt{s_{{}_{NN}}}$ from 62.4 GeV to 2.76 TeV
• Low-momentum direct photon measurement in Cu$+$Cu collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Understanding jet quenching and medium response with di-hadron correlation
• Energy loss for heavy quarks in relation to light partons; is radiative energy loss for heavy quarks anomalous?
• In-medium jet shape from energy collimation in parton showers: Comparison with CMS PbPb data at 2.76 TeV
• Pion, kaon, and (anti-)proton production in U+U Collisions at $\sqrt{s_{NN}}$ = 193 GeV measured with the STAR detector
• Highlights from PHENIX - II
• Single inclusive pion pT-spectra in proton-proton collisions at sqrt(s) = 22.4GeV: data versus perturbative QCD calculations
• Dileptons and Photons at RHIC Energies
• Photon Production in Hot and Dense Strongly Interacting Matter
• Centrality and Transverse momentum dependencies of Hadrons in Xe+Xe collisions at $\sqrt{s_{NN}}=5.44$ TeV from a multi-phase transport model
• Jet Evolution in the Quark-Gluon Plasma from RHIC to the LHC
• Production of ${\pi }^0$ and $\eta$ mesons in U$+$U collisions at $\sqrt{s_{{}_{NN}}}=192$ GeV
• How to Make Sense of the Jet Correlations Results at RHIC?
• Successes and failures with hard probes
• System size dependence of nuclear modification and azimuthal anisotropy of jet quenching
• Jet quenching in QCD matter: from RHIC to LHC
• Zeroing in on jet quenching: a PHENIX perspective
• Hydrodynamic evolution and jet energy loss in Cu+Cu collisions
• Measurement of light mesons at RHIC by the PHENIX experiment
• Results from RHIC with Implications for LHC
• Results from PHENIX at RHIC with Implications for LHC
• PHENIX results on the $\sqrt{s_{\mathrm{NN}}}$ dependence of jet quenching
• Nucleon-Gold Collisions at 200 AGeV Using Tagged d+Au Interactions in PHOBOS
• Contrasting Features of Parton Energy Loss in Heavy-ion Collisions at RHIC and the LHC
• Neutral pion production in Au+Au collisions at RHIC
• Detailed study of parton energy loss via measurement of fractional momentum loss of high $p_T$ hadrons in heavy ion collisions