Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Energy dependence of string fragmentation function and $\phi$ meson
  production   The $\phi$ meson productions in $Au+Au$ and/or $Pb+Pb$ collisions at AGS,
SPS, RHIC, and LHC energies have been studied systematically with a hadron and
string cascade model LUCIAE. After considering the energy dependence of the
model parameter $\alpha$ in string fragmentation function and adjusting it to
the experimental data of charged multiplicity to a certain extent, the model
predictions for $\phi$ meson yield, rapidity, and/or transverse mass
distributions are compatible with the experimental data at AGS, SPS and RHIC
energies. A calculation for $Pb+Pb$ collisions at LHC energy is given as well.
The obtained fractional variable in string fragmentation function shows a
saturation in energy dependence. It is discussed that the saturation of
fractional variable in string fragmentation function might be a qualitative
representation of the energy dependence of nuclear transparency.

19
The categories of this paper are: eess
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The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: stat
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
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The categories of this paper are: q-fin
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The categories of this paper are: econ
25
The categories of this paper are: patt-sol