AMPT generates high elliptic flow with few-millibarn cross sections due to specific features in initial conditions, interactions, and partonic dynamics, identified via comparisons with the MPC model.
Hadronization in heavy ion collisions: Recombination and fragmentation of partons
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abstract
We argue that the emission of hadrons with transverse momentum up to about 5 GeV/c in central relativistic heavy ion collisions is dominated by recombination, rather than fragmentation of partons. This mechanism provides a natural explanation for the observed constant baryon-to-meson ratio of about one and the apparent lack of a nuclear suppression of the baryon yield in this momentum range. Fragmentation becomes dominant at higher transverse momentum, but the transition point is delayed by the energy loss of fast partons in dense matter.
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How AMPT generates large elliptic flow with small cross sections
AMPT generates high elliptic flow with few-millibarn cross sections due to specific features in initial conditions, interactions, and partonic dynamics, identified via comparisons with the MPC model.