The rapidity and centrality dependence of nuclear modification factors at RHIC - what does bulk particle production tell us about the nuclear medium ? - Archive ouverte HAL Access content directly
Conference Papers Year : 2004

The rapidity and centrality dependence of nuclear modification factors at RHIC - what does bulk particle production tell us about the nuclear medium ?

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I. Arsene
  • Function : Author
G. Bearden
  • Function : Author
D. Beavis
  • Function : Author
C. Besliu
  • Function : Author
B. Budick
  • Function : Author
H. Boggild
  • Function : Author
C. Chasman
  • Function : Author
C.H. Christensen
  • Function : Author
P. Christiansen
  • Function : Author
J. Cibor
  • Function : Author
R. Debbe
  • Function : Author
E. Enger
  • Function : Author
J.J. Gaardhoje
  • Function : Author
M. Germinario
  • Function : Author
K. Hagel
  • Function : Author
H. Ito
  • Function : Author
A. Jipa
  • Function : Author
J.I. Jordre
  • Function : Author
C.E. Jorgensen
  • Function : Author
R. Karabowicz
  • Function : Author
E.J. Kim
  • Function : Author
T.M. Larsen
  • Function : Author
J.H. Lee
  • Function : Author
Y.K. Lee
  • Function : Author
S. Lindal
  • Function : Author
G. Lovhoiden
  • Function : Author
Z. Majka
  • Function : Author
A. Makeev
  • Function : Author
B. Mcbreen
  • Function : Author
M. Mikelsen
  • Function : Author
M. Murray
  • Function : Author
J. Natowitz
  • Function : Author
B. Neumann
B.S. Nielsen
  • Function : Author
J. Norris
  • Function : Author
D. Ouerdane
  • Function : Author
R. Planeta
  • Function : Author
C. Ristea
  • Function : Author
O. Ristea
  • Function : Author
D. Rohrich
  • Function : Author
D. Sandberg
  • Function : Author
S.J. Sanders
  • Function : Author
R.A. Scheetz
  • Function : Author
P. Staszel
  • Function : Author
T.S. Tveter
  • Function : Author
F. Videbaek
  • Function : Author
R. Wada
  • Function : Author
Z. Yin
  • Function : Author
I.S. Zgura
  • Function : Author

Abstract

The BRAHMS experiment at RHIC has measured the production of charged hadrons as a function of pseudorapidity and transverse momentum in Au+Au, d + Au, and p+p collisions at a common energy of sqrt(s_NN)= 200 GeV, and from these spectra we construct the nuclear modification factors for both "hot" and "cold" nuclear matter. In this contribution I will show how these factors evolve with pseudorapidity and collision centrality. We see a Cronin-like enhancement in d+Au collisions at midrapidity, going to a strong suppression at eta >=2. In central Au+Au collisions we find a suppression both at mid-and forward rapidities that vanishes for peripheral collisions. We interpret this as signs of several different medium ralted effects modifying bulk particle production in Au+Au and d+Au collisions at RHIC energies.

Dates and versions

in2p3-00023178 , version 1 (06-10-2004)

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Cite

I. Arsene, G. Bearden, D. Beavis, C. Besliu, B. Budick, et al.. The rapidity and centrality dependence of nuclear modification factors at RHIC - what does bulk particle production tell us about the nuclear medium ?. 42th International Winter Meeting on Nuclear Physics, Jan 2004, Bormio, Italy. ⟨in2p3-00023178⟩
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