Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of Transverse Single Spin Asymmetries in $\pi^0$ Production
  from $p^{\uparrow}+p$ and $p^{\uparrow}+A$ Collisions at STAR   In 2015 the first collisions between polarized protons and nuclei occurred at
the Relativistic Heavy Ion Collider (RHIC), at a center-of-mass energy of
$\sqrt{s_{NN}}=200$ GeV. Comparisons between spin asymmetries and
cross-sections in $p+p$ production to those in $p+A$ production provide insight
into nuclear structure, namely nuclear modification factors, nuclear dependence
of spin asymmetries, and comparison to models with saturation effects. The
transverse single-spin asymmetry, $A_{N}$, has been measured in $\pi^{0}$
production in the STAR Forward Meson Spectrometer (FMS), an electromagnetic
calorimeter covering a forward psuedorapidity range of $2.6<\eta<4$. Within
this kinematic range, STAR has previously reported the persistence of large
$\pi^0$ asymmetries with unexpected dependences on $p_T$ and event topology in
$p+p$ collisions. This talk will compare these dependences to those in $p+A$
production.

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The categories of this paper are: cond-mat
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The categories of this paper are: solv-int
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The categories of this paper are: astro-ph
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The categories of this paper are: math
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The categories of this paper are: q-fin
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The categories of this paper are: quant-ph
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The categories of this paper are: cs
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The categories of this paper are: alg-geom
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The categories of this paper are: patt-sol
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-alg
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The categories of this paper are: ao-sci
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The categories of this paper are: bayes-an
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The categories of this paper are: chem-ph
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The categories of this paper are: math-ph
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The categories of this paper are: adap-org