Nonlinear Phenomena in Complex Systems, 2009, Vol.12, No.4, pp.519-523

NONLINEAR PHENOMENA IN COMPLEX SYSTEMS
An Interdisciplinary Journal

2009, Vol.12, No.4, pp.519-523

The Ridge Associated with the Near-side Jet in High Energy-Heavy-Ion Collisions.
Cheuk-Yin Wong

The ridge particles associated with a near-side jet are identified as medium partons kicked by the jet near the surface. They carry direct information on the parton momentum distribution at the moment of jet-parton collisions and the magnitude of the longitudinal momentum kick. The extracted early parton momentum distribution has a rapidity plateau structure with a thermal-like transverse momentum distribution. Such a rapidity plateau structure may arise from particle production in flux tubes, as color charges and anti-color charges separate at high energies.
Key words: heavy-ion collisions, particles associated with a jet, early parton momentum distribution, string fragmentation

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