Light-front wavefunction dependence of the quark recombination

Details Light-front wavefunction dependence of the quark recombination Light-front wavefunction dependence of the quark recombination

2005-10-14

arxiv.org/abs/hep-ph/0510187v2

Phys.Rev.C73:054901,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

26 pages, 7 figures

Scientific paper

10.1103/PhysRevC.73.054901

We present an extension of the recombination formalism to analyze the effects from the variation of the hadron wavefunctions. The hadron spectra are sensitive to the shape of the wavefunctions. However, when we fit the wavefunction parameters to the physical observables, such as the average charge radius, the final spectra are very similar each other. We discuss our numerical results in comparison with the published PHENIX and STAR data at RHIC. In the hadron spectra, the recombination of thermal partons dominates at intermediate transverse momentum ($P_{T}$ = 2 $\sim$ 5 GeV), and the fragmentation dominates at high $P_{T}$ ($>$ 5 GeV). The yield ratios and the nuclear modification factors for various hadron species are also estimated and compared to the experimental data. We present a new prediction on $\bar{p}/p$ and $K^{-}/K^{+}$ ratios, including the jet quenching effects to the fragmentation mechanism.

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