\begin{document}$ \mu_{5} $\end{document} based on nonextensive statistical mechanics. A feature of this new statistic is a dimensionless nonextensivity parameter q, which summarizes all possible effects violating the assumptions of Boltzmann-Gibbs (BG) statistics (when \begin{document}$ q\rightarrow1 $\end{document}, it returns to the BG case). Within the nonextensive Polyakov-Nambu-Jona-Lasinio model, we find that as \begin{document}$ \mu_{5} $\end{document} increases, the critical end point (CEP) in the \begin{document}$ T-\mu $\end{document} plane continues to \begin{document}$ \mathrm{CEP}_{5} $\end{document} in the \begin{document}$ T-\mu_{5} $\end{document} plane, and nonextensive effects have a significant impact on the evolution from the CEP to \begin{document}$ \mathrm{CEP}_{5} $\end{document}. Generally, with an increase in q, both the CEP and \begin{document}$ \mathrm{CEP}_{5} $\end{document} move in the direction of a lower temperature T and larger chemical potential μ (\begin{document}$ \mu_{5} $\end{document}). In addition, we find that chiral charge density \begin{document}$ n_{5} $\end{document} generally increases with T, μ, \begin{document}$ \mu_{5} $\end{document}, and q. Our study may provide useful hints about lattice QCD and relativistic heavy-ion collision experiments."> Nonextensive effects on QCD chiral phase transition with a chiral chemical potential -
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