Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $\phi$ meson production in $d$$+$Au collisions at $\sqrt{s_{_{NN}}}=200$
  GeV   The PHENIX experiment has measured $\phi$ meson production in $d$$+$Au
collisions at $\sqrt{s_{_{NN}}}=200$ GeV using the dimuon and dielectron decay
channels. The $\phi$ meson is measured in the forward (backward) $d$-going
(Au-going) direction, $1.2<y<2.2$ ($-2.2<y<-1.2$) in the transverse-momentum
($p_T$) range from 1--7 GeV/$c$, and at midrapidity $|y|<0.35$ in the $p_T$
range below 7 GeV/$c$. The $\phi$ meson invariant yields and
nuclear-modification factors as a function of $p_T$, rapidity, and centrality
are reported. An enhancement of $\phi$ meson production is observed in the
Au-going direction, while suppression is seen in the $d$-going direction, and
no modification is observed at midrapidity relative to the yield in $p$$+$$p$
collisions scaled by the number of binary collisions. Similar behavior was
previously observed for inclusive charged hadrons and open heavy flavor
indicating similar cold-nuclear-matter effects.

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The categories of this paper are: supr-con
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The categories of this paper are: solv-int
2
The categories of this paper are: math
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: mtrl-th
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The categories of this paper are: atom-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: comp-gas
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The categories of this paper are: q-alg
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The categories of this paper are: econ
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The categories of this paper are: alg-geom
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The categories of this paper are: cs
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The categories of this paper are: funct-an
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The categories of this paper are: ao-sci
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The categories of this paper are: chao-dyn