Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Influence of the neutron-skin effect on nuclear isobar collisions at
  RHIC   The unambiguous observation of a Chiral Magnetic Effect (CME)-driven charge
separation is the core aim of the isobar program at RHIC consisting of
${^{96}_{40}}$Zr+${^{96}_{40}}$Zr and ${^{96}_{44}}$Ru+${^{96}_{44}}$Ru
collisions at $\sqrt {s_{\rm NN}}\!=\!200$ GeV. We quantify the role of the
spatial distributions of the nucleons in the isobars on both eccentricity and
magnetic field strength within a relativistic hadronic transport approach
(SMASH, Simulating Many Accelerated Strongly-interacting Hadrons). In
particular, we introduce isospin-dependent nucleon-nucleon spatial correlations
in the geometric description of both nuclei, deformation for ${^{96}_{44}}$Ru
and the so-called neutron skin effect for the neutron-rich isobar i.e.
${^{96}_{40}}$Zr. The main result of this study is a reduction of the magnetic
field strength difference between ${^{96}_{44}}$Ru+${^{96}_{44}}$Ru and
${^{96}_{40}}$Zr+${^{96}_{40}}$Zr by a factor of 2, from $10\%$ to $5\%$ in
peripheral collisions when the neutron-skin effect is included. Further, we
find an increase of eccentricity by up to 10$\%$ when deformation is taken into
account while neither the neutron skin effect nor the nucleon-nucleon
correlations result into a significant modification of this observable with
respect to the traditional Woods-Saxon modeling. Our results suggest a
significantly smaller CME signal to background ratio for the experimental
charge separation measurement in peripheral collisions with the isobar systems
than previously expected.

29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci