### Session J13: Minisymposium on Hard Probes of the Quark-Gluon Plasma

10:45 AM–12:33 PM, Sunday, April 13, 2008
Hyatt Regency St. Louis Riverfront (formerly Adam's Mark Hotel), Room: St. Louis F

Chair: Xin-Nian Wang, Lawrence Berkeley National Laboratory

Abstract ID: BAPS.2008.APR.J13.2

### Abstract: J13.00002 : Constraining energy-loss model parameters using multiple high-pt observables at RHIC

11:21 AM–11:33 AM

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#### Author:

Craig Ogilvie
(Iowa State University)

High-momentum partons lose energy as they travel through the dense QGP that is formed at RHIC. In a recent publication PHENIX has performed a quantitative comparison between various parton energy-loss models and experimental data on single-particle suppression (R$_{AA})$ versus pt. These data provided a constraint on the model parameters of medium opacity. It is important to also compare these model calculations with other complementary observables, such as R$_{AA}$ as a function of the reaction plane, or the suppression of two-particle correlations. Using other observables can more fully test energy-loss models, since a broader suite of observables not only tests for consistency but may also offer better sensitivity to the model parameters and sample path-length distributions differently than R$_{AA}$. In this talk I will present the status of using PHENIX results to constrain the theoretical models of energy-loss at RHIC.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2008.APR.J13.2