Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Event-plane decorrelation over pseudo-rapidity and its effect on
  azimuthal anisotropy measurement in relativistic heavy-ion collisions   Within A Multi-Phase Transport model, we investigate decorrelation of event
planes over pseudorapidity and its effect on azimuthal anisotropy measurements
in relativistic heavy-ion collisions. The decorrelation increases with
increasing {\eta} gap between particles used to reconstruct the event planes.
The third harmonic event planes are found even anticorrelated between forward
and backward rapidities, the source of which may root in the opposite
orientation of the collision geometry triangularities. The decorrelation may
call into question the anisotropic flow measurements with pseudorapidity gap
designed to reduce nonflow contributions, hence the hydrodynamic properties of
the quark-gluon plasma extracted from those measurements.

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The categories of this paper are: hep-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: econ
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The categories of this paper are: adap-org
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The categories of this paper are: cs
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The categories of this paper are: cond-mat
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The categories of this paper are: q-alg
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The categories of this paper are: nlin
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The categories of this paper are: q-fin
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The categories of this paper are: chao-dyn
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The categories of this paper are: patt-sol
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The categories of this paper are: astro-ph
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The categories of this paper are: q-bio
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The categories of this paper are: stat
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The categories of this paper are: math-ph
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The categories of this paper are: gr-qc