Hadronization in heavy ion collisions: Recombination and fragmentation of partons

Details Hadronization in heavy ion collisions: Recombination and fragmentation of partons Hadronization in heavy ion collisions: Recombination and fragmentation of partons

2003-01-27

arxiv.org/abs/nucl-th/0301087v3

Phys.Rev.Lett.90:202303,2003

Physics

Nuclear Physics

Nuclear Theory

4 pages, 2 figures; v2: reference [8] added; v3: Eq.(2) corrected, two references added, version to appear in PRL

Scientific paper

10.1103/PhysRevLett.90.202303

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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