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Title: Rapidity and centrality dependence of particle production for identified hadrons in Cu + Cu collisions at s NN = 200 GeV

Journal Article · · Physical Review. C
 [1]
  1. Univ. of Oslo (Norway). Department of Physics. et al.

The BRAHMS collaboration has measured transverse momentum spectra of pions, kaons, protons, and antiprotons at rapidities 0 and 3 for Cu+Cu collisions at s NN = 200 GeV. As the collisions become more central the collective radial flow increases while the temperature of kinetic freeze-out decreases. The temperature is lower and the radial flow weaker at forward rapidity. Pion and kaon yields with transverse momenta between 1.5 and 2.5 GeV/c are suppressed for central collisions relative to scaled p + p collisions. This suppression, which increases as the collisions become more central, is consistent with jet quenching models and is also present with comparable magnitude at forward rapidity. At such rapidities, initial state effects may also be present and persistence of the meson suppression to high rapidity may reflect a combination of jet quenching and nuclear shadowing. In conclusion, the ratio of protons to mesons increases as the collisions become more central and is largest at forward rapidities.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States). Relativistic Heavy Ion Collider
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Contributing Organization:
BRAHMS Collaboration
OSTI ID:
1340370
Alternate ID(s):
OSTI ID: 1266411
Report Number(s):
BNL--112479-2016-JA; KB0202012
Journal Information:
Physical Review. C, Journal Name: Physical Review. C Journal Issue: 1 Vol. 94; ISSN 2469-9985
Publisher:
APSCopyright Statement
Country of Publication:
United States
Language:
English

References (68)

Evolution of π 0 Suppression in Au + Au Collisions from s NN = 39 to 200 GeV journal October 2012
The BRAHMS ring imaging Cherenkov detector
  • Debbe, R.; Jørgensen, C. E.; Olness, J.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 570, Issue 1 https://doi.org/10.1016/j.nima.2006.09.100
journal January 2007
Pion, kaon, proton and anti-proton transverse momentum distributions from p+p and d+Au collisions at sNN=200 GeV journal June 2005
Reconstructing the Freeze-out State in Pb+Pb Collisions at 158 A GeV/ c a journal February 2003
Centrality Dependence of High- p T Hadron Suppression in A u + A u Collisions at s N N = 130     G e V journal October 2002
Production of charged pions, kaons and protons at large transverse momenta in pp and Pb–Pb collisions at s NN = 2.76 TeV journal September 2014
Observation and studies of jet quenching in PbPb collisions at s N N = 2.76 TeV journal August 2011
Experimental and theoretical challenges in the search for the quark–gluon plasma: The STAR Collaboration's critical assessment of the evidence from RHIC collisions journal August 2005
Evolution of the Nuclear Modification Factors with Rapidity and Centrality in d + A u Collisions at N N S = 200     G e V journal December 2004
Transverse-momentum distributions of charged particles produced in p ¯ p interactions at √ s ¯=630 and 1800 GeV journal October 1988
Production of Mesons and Baryons at High Rapidity and High p T in Proton-Proton Collisions at s = 200     GeV journal June 2007
Centrality dependence of strangeness production in heavy-ion collisions as a geometrical effect of core–corona superposition journal March 2009
Hadronization in Heavy-Ion Collisions: Recombination and Fragmentation of Partons journal May 2003
Core-Corona Separation in Ultrarelativistic Heavy Ion Collisions journal April 2007
Kaon and pion production in central Au + Au collisions at sNN=62.4 GeV journal April 2010
Suppression of Hadrons with Large Transverse Momentum in Central A u + A u Collisions at s NN = 130 GeV journal December 2001
High-pT pion quenching versus anti+baryon enhancement in nucleus-nucleus collisions journal March 2003
Rapidity dependence of the proton-to-pion ratio in and collisions at and 200 GeV journal February 2010
The BRAHMS experiment at RHIC
  • Adamczyk, M.; Antvorskov, L.; Ashktorab, K.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 499, Issue 2-3 https://doi.org/10.1016/S0168-9002(02)01949-6
journal March 2003
Transverse-Momentum Spectra in A u + A u and d + A u Collisions at s N N = 200     G e V and the Pseudorapidity Dependence of High- p T Suppression journal August 2003
Absence of Suppression in Particle Production at Large Transverse Momentum in s N N = 200     G e V d + A u Collisions journal August 2003
Recombination of shower partons at high p T in heavy-ion collisions journal August 2004
Identified charged particles in quark and gluon jets journal October 2000
Identified charged particle spectra and yields in Au + Au collisions at s N N = 200 GeV journal March 2004
Early thermalization at RHIC journal May 2002
Quark–gluon plasma and color glass condensate at RHIC? The perspective from the BRAHMS experiment journal August 2005
Interpretation of the Nonextensivity Parameter q in Some Applications of Tsallis Statistics and Lévy Distributions journal March 2000
K * 0 production in Cu + Cu and Au + Au collisions at s N N = 62.4 GeV and 200 GeV journal September 2011
Viscosity in Strongly Interacting Quantum Field Theories from Black Hole Physics journal March 2005
Jet fragmentation via recombination of parton showers journal April 2016
Strange particle production in p + p collisions at s = 200 GeV journal June 2007
Partonic coalescence in relativistic heavy ion collisions journal September 2003
Pseudorapidity dependence of parton energy loss in relativistic heavy ion collisions journal December 2003
Measurement of Λ and Λ ¯ Particles in A u + A u Collisions at s N N = 130     G e V journal August 2002
Energy Loss and Flow of Heavy Quarks in Au + Au Collisions at s NN = 200     GeV journal April 2007
Hadron production in heavy ion collisions: Fragmentation and recombination from a dense parton phase journal October 2003
Pseudorapidity Distributions of Charged Particles from Au + Au Collisions at the Maximum RHIC Energy, s NN = 200 GeV journal May 2002
Correlated Emission of Hadrons from Recombination of Correlated Partons journal March 2005
Scaling properties at freeze-out in relativistic heavy-ion collisions journal March 2011
Overview and Recent Results from BRAHMS journal November 2009
Azimuthal anisotropy: Ridges, recombination, and breaking of quark number scaling journal October 2008
High- p_{T} charged hadron suppression in Au+Au collisions at sqrt[s_{NN}]=200GeV journal March 2004
Suppressed π 0 Production at Large Transverse Momentum in Central A u + A u Collisions at s N N = 200     G e V journal August 2003
Inclusive cross section and double helicity asymmetry for π 0 production in p + p collisions at s = 200     GeV : Implications for the polarized gluon distribution in the proton journal September 2007
Spectra and ratios of identified particles in Au+Au and d +Au collisions at s N N = 200 GeV journal August 2013
Explaining the fine hierarchy in pion and kaon suppression at LHC: importance of fragmentation functions journal March 2014
Centrality dependent particle production at y = 0 and y ~ 1 in Au+Au collisions at s NN = 200 GeV journal July 2005
Charged hadron transverse momentum distributions in Au+Au collisions at sNN=200 GeV journal January 2004
Measurement of the jet radius and transverse momentum dependence of inclusive jet suppression in lead–lead collisions at sNN=2.76 TeV with the ATLAS detector journal February 2013
Jet quenching and the p ¯ ≳ π − anomaly in heavy ion collisions at relativistic energies journal April 2002
The RHIC zero degree calorimeters
  • Adler, C.; Denisov, A.; Garcia, E.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 470, Issue 3 https://doi.org/10.1016/S0168-9002(01)00627-1
journal September 2001
Observation of a Centrality-Dependent Dijet Asymmetry in Lead-Lead Collisions at s NN = 2.76     TeV with the ATLAS Detector at the LHC journal December 2010
Multiple Scattering, Parton Energy Loss, and Modified Fragmentation Functions in Deeply Inelastic eA Scattering journal October 2000
Evidence from d + A u Measurements for Final-State Suppression of High- p T Hadrons in A u + A u Collisions at RHIC journal August 2003
K ( 892 ) * resonance production in Au+Au and p + p collisions at s NN = 200 GeV journal June 2005
Measurement of jet fragmentation into charged particles in pp and PbPb collisions at $ \sqrt{{{s_{\mathrm{NN}}}}} = 2.76 $ TeV journal October 2012
Minijet scale and energy loss at relativistic energies in event generator models journal November 2003
Transverse-Momentum and Collision-Energy Dependence of High- p T Hadron Suppression in A u + A u Collisions at Ultrarelativistic Energies journal October 2003
Interplay between soft and hard hadronic components for identified hadrons in relativistic heavy ion collisions journal March 2004
Strangeness Enhancement in Cu-Cu and Au-Au Collisions at s N N = 200     GeV journal February 2012
Measurement of neutral mesons in p + p collisions at s = 200     GeV and scaling properties of hadron production journal March 2011
Particle spectra in Pb-Pb collisions at s NN = 2 . 76 TeV journal June 2012
Nuclear modification factor for charged pions and protons at forward rapidity in central Au+Au collisions at 200 GeV journal July 2007
Recent results from the BRAHMS experiment journal August 2006
Hadron production from quark coalescence and jet fragmentation journal April 2005
Spectra of identified high- p T π ± and p ( p¯ ) in Cu + Cu collisions at s NN = 200 GeV journal May 2010
The PHOBOS perspective on discoveries at RHIC journal August 2005
Formation of dense partonic matter in relativistic nucleus–nucleus collisions at RHIC: Experimental evaluation by the PHENIX Collaboration journal August 2005