Publication Type
Journal
Journal Name
Chinese Physics Letters
Publication Date
Page Numbers
3936 to 3939
Volume
25
Issue
11
Abstract
We extract the early parton momentum distribution using the STAR Collaboration data of ridge particles associated with a near-side jet for central AuAu collisions at \sqrt{S_NN} = 200 GeV. The ridge particles are identified as medium partons kicked by the jet near the surface, and they carry direct information on the parton momentum distribution at the moment of jet-parton collision. The extracted parton momentum distribution has a thermal-like transverse momentum distribution but a non-Gaussian, relatively flat rapidity distribution at mid-rapidities with sharp kinematic boundaries at large rapidities that depend on the transverse momentum.
