Relativistic correction to the dissociation temperature of Bc mesons in a hot medium

By solving two body Dirac equations with potentials at finite temperature, we calculate the dissociation temperature \begin{document}$ T_d $\end{document} of \begin{document}$ B_c $\end{document} mesons in quark-gluon plasma. It is found that \begin{document}$ T_d $\end{document} becomes higher with the relativistic correction than the \begin{document}$ T_d $\end{document} from the Schr?dinger equation. Both the short range interaction and the constant term of the potential at the long-range scale have a contribution to the shift of \begin{document}$ T_d $\end{document}, while the spin interaction is negligible.