Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2003-01-27
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.
Bass Steffen A.
Fries Rainer J.
Müller Berndt
Nonaka Chiho
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