Limiting fragmentation and $φ$ meson production at RHIC

Details Limiting fragmentation and $φ$ meson production at RHIC Limiting fragmentation and $φ$ meson production at RHIC

2003-09-26

arxiv.org/abs/nucl-th/0309070v1

Physics

Nuclear Physics

Nuclear Theory

Scientific paper

The PHOBOS's limiting fragmentation etc. three empirical scaling rules for charged multiplicity in $Au+Au$ collisions at RHIC are investigated by a hadron and string cascade model LUCIAE. Similar studies are performed for the $\phi$ meson exploring its production mechanism via comparing with the charged multiplicity. The LUCIAE results for charged multiplicity are compatible with PHOBOS observations. However, for the $\phi$ meson the three empirical scaling rules are either kept only or kept better in the LUCIAE calculations without reduction mechanism of the $s$ quark suppression extra introduced for the strangeness in LUCIAE model. These results seem indicating a universal production mechanism for charged particle and $\phi$ meson in string fragmentation regime. It is discussed that the PHOBOS's empirical scaling rules are model dependent indeed.

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