10:45 AM–12:21 PM, Tuesday, April 25, 2006
Hyatt Regency Dallas - Cumberland A
Sponsoring Unit:
DNP
Chair: Peter Jacobs, Lawrence Berkeley National Laboratory
Abstract ID: BAPS.2006.APR.W8.1
10:45 AM–11:21 AM
Haidong Liu
(USTC/LBL/BNL)
Ultra-relativistic Au+Au collisions at $\sqrt{s_{_{NN}}} = 200$ GeV at RHIC create a hot and dense medium that exhibits novel properties. Study of these properties and hadronization mechanisms of the medium requires identified particle results over wide transverse momentum ($p_T$) range since different mechanisms govern hadron production in different kinematic regions. Particle identification at low, intermediate and high $p_{T}$ is achieved from Time Projection Chamber and Time-of-Flight system at STAR. In this talk, we present the $p_T$ distributions of $\pi^{\pm}$, $p$ and $\bar{p}$, their nuclear modification factors and particle ratios from 200 GeV Au+Au collisions up to 12 GeV/$c$ at mid-rapidity. We discuss the relative baryon enhancement at intermediate $p_{T}$ and the flavor dependence of the energy loss. We also discuss the possible transition between jet dominant fragmentation and quark coalescence at hadronization.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2006.APR.W8.1