Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Importance of non-flow background on the chiral magnetic wave search   An observable sensitive to the chiral magnetic wave (CMW) is the charge
asymmetry dependence of the $\pi^{-}$ and $\pi^{+}$ anisotropic flow
difference, $\Delta v_{n}(A_{\rm ch})$. We show that, due to non-flow
correlations, the flow measurements by the Q-cumulant method using all charged
particles as reference introduce a trivial linear term to $\Delta v_{n}(A_{\rm
ch})$. The trivial slope contribution to the triangle flow difference $\Delta
v_{3}(A_{\rm ch})$ can be negative if the non-flow is dominated by back-to-back
pairs. This can explain the observed negative $\Delta v_{3}(A_{\rm ch})$ slope
in the preliminary STAR data. We further find that the non-flow correlations
give rise to additional backgrounds to the slope of $\Delta v_{2}(A_{\rm ch})$
from the competition among different pion sources and from the larger
multiplicity dilution to $\pi^{+}$ ($\pi^{-}$) at positive (negative) $A_{\rm
ch}$.

37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin