\begin{document}$ (A _{\rm FB}) $\end{document} in \begin{document}$ \Lambda_b \rightarrow \Lambda l^+ l^-(l=e,\mu,\tau) $\end{document} in the quark-diquark model. This approach provides precise form factors that are different from those of quantum chromodynamics (QCD) sum rules. We calculate the rare decay form factors for \begin{document}$ \Lambda_b \rightarrow \Lambda l^+ l^- $\end{document}b and investigate the (integrated) forward-backward asymmetries in these decay channels. We observe the integrated \begin{document}$ A^l_{\rm FB} $\end{document}, \begin{document}$ \bar{A}^l_{\rm FB}(\Lambda_b \rightarrow $\end{document}\begin{document}$ \Lambda e^+ e^-) \simeq -0.1371 $\end{document}, \begin{document}$ \bar{A}^l_{\rm FB}(\Lambda_b \rightarrow \Lambda \mu^+ \mu^-) \simeq -0.1376 $\end{document}, and \begin{document}$ \bar{A}^l_{\rm FB}(\Lambda_b \rightarrow \Lambda \tau^+ \tau^-) \simeq $\end{document}\begin{document}$ -0.1053 $\end{document}; the hadron side asymmetries \begin{document}$ \bar{A}^h_{\rm FB}(\Lambda_b \rightarrow \Lambda \mu^+ \mu^-)\simeq -0.2315 $\end{document}; the lepton-hadron side asymmetries \begin{document}$ \bar{A}^{lh}_{\rm FB}(\Lambda_b \rightarrow \Lambda \mu^+ \mu^-)\simeq 0.0827 $\end{document}; and the longitudinal polarization fractions \begin{document}$ \bar{F}_L(\Lambda_b \rightarrow \Lambda \mu^+ \mu^-)\simeq 0.5681 $\end{document}."> Forward-backward asymmetries in <inline-formula><tex-math id="M1">\begin{document}${\boldsymbol \Lambda_{\boldsymbol b} \boldsymbol\rightarrow \boldsymbol\Lambda l^+ l^- }$\end{document}</tex-math><alternatives><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="//www.macurncorp.com/cpc/article/app/id/706a87a3-b0a7-413c-99da-37809442844e/CPC-2022-0118_M1.jpg"/><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="//www.macurncorp.com/cpc/article/app/id/706a87a3-b0a7-413c-99da-37809442844e/CPC-2022-0118_M1.png"/></alternatives></inline-formula> in the Bethe-Salpeter equation approach -
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