# 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

Abstract : The PHENIX experiment has measured the suppression of semi-inclusive single high transverse momentum pi^0's in Au+Au collisions at sqrt(s_NN) = 200 GeV. The present understanding of this suppression is in terms of energy-loss of the parent (fragmenting) parton in a dense color-charge medium. We have performed a quantitative comparison between various parton energy-loss models and our experimental data. The statistical point-to-point uncorrelated as well as correlated systematic uncertainties are taken into account in the comparison. We detail this methodology and the resulting constraint on the model parameters of medium opacity, as characterized via the initial color-charge density dN^g/dy or the medium transport coefficient q^hat. We find that high transverse momentum pi^0 suppression in Au+Au collisions has sufficient accuracy to constrain these model dependent opacity parameters at the level of +/- 20-25% (1 standard deviation). These constraints include only the experimental uncertainties, and further studies are needed to compute the corresponding theoretical uncertainties. Extracting fundamental model-independent characteristics of the medium requires resolution of the differences in the model calculations.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00204695
Contributor : Suzanne Robert <>
Submitted on : Tuesday, January 15, 2008 - 12:15:28 PM
Last modification on : Friday, November 13, 2020 - 9:12:25 AM

### Citation

A. Adare, S. Afanasiev, C. Aidala, N.N. Ajitanand, Y. Akiba, et al.. 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. Physical Review C, American Physical Society, 2008, 77, pp.064907. ⟨10.1103/PhysRevC.77.064907⟩. ⟨in2p3-00204695⟩

Record views