Suppression pattern of neutral pions at high transverse momentum in Au$+$Au collisions at $\sqrt{s_{NN}}=$ 200 GeV and constraints on medium transport coefficients - INSPIRE

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Suppression pattern of neutral pions at high transverse momentum in Au $+$ Au collisions at $\sqrt{s_{NN}}=$ 200 GeV and constraints on medium transport coefficients

PHENIX

Collaboration

Jan, 2008

6 pages

Published in:

Phys.Rev.Lett. 101 (2008) 232301

e-Print:

0801.4020 [nucl-ex]

DOI:

10.1103/PhysRevLett.101.232301

Experiments:

BNL-RHIC-PHENIX

View in:

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Abstract: (arXiv)

For Au + Au collisions at 200 GeV we measure neutral pion production with good statistics for transverse momentum, p_T, up to 20 GeV/c. A fivefold suppression is found, which is essentially constant for 5 < p_T < 20 GeV/c. Experimental uncertainties are small enough to constrain any model-dependent parameterization for the transport coefficient of the medium, e.g. \mean(q^hat) in the parton quenching model. The spectral shape is similar for all collision classes, and the suppression does not saturate in Au+Au collisions/ instead, it increases proportional to the number of participating nucleons, as N_part^2/3.

Note:

422 authors, 6 pages text, RevTeX-4, 4 figures, 1 Table. 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

25.75.Dw
nucleus nucleus: colliding beams
scattering: heavy ion
gold
pi0: yield
transverse momentum dependence
impact parameter: dependence
nuclear matter: effect
transport theory
parton: quenching

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