production differs by a factor of about $2$ in the cross section. On the other hand, such an increase of the cross section is compensated already by a rather small increase of the slepton mass by a factor of less than about $1.3$. Accordingly, the contribution from another neutral current DY produced slepton ${\widetilde{l}}_{\text{L}}$ decaying into the NLSP will only be noticeable if ${{\widetilde{\tau}}}_1\simeq{{\widetilde{\tau}}}_{\text{R}}$ and for a very small gap between ${m_{{{\widetilde{\tau}}}_1}}$ and $m_{{\widetilde{l}}_{\text{L}}}$. Production of ${\widetilde{l}}_{\text{L}}\,{\widetilde{\nu}}_{l}$ via $W^{\pm}$ is in principle enhanced relative to $Z,\gamma\to{\widetilde{l}}^{+}_{\text{L}}\,{\widetilde{l}}^{-}_{\text{L}}$ by a factor of $2$ to $3$. Since only ${\widetilde{l}}_{\text{L}}$ couples to $W^{\pm}$, direct production of ${{\widetilde{\tau}}}_1$ via $W^{\pm}$ is suppressed by $\sin^2{\theta_{{{\widetilde{\tau}}}}}$ and thus unlikely for ${{\widetilde{\tau}}}_1\simeq{{\widetilde{\tau}}}_{\text{R}}$. By contrast, production of ${\widetilde{l}}^{+}_{\text{L}}\,{\widetilde{\nu}}_{l}$ via $W^{+}$ can be of the same order as $Z,\gamma\to{{\widetilde{\tau}}}^{+}_{\text{R}}\,{{\widetilde{\tau}}}^{-}_{\text{R}}$ if $m_{{\widetilde{l}}_{\text{L}}}\simeq m_{{\widetilde{\nu_{l}}}}\lesssim1.6\,{m_{{{\widetilde{\tau}}}_1}}$. (The production via $W^+$ is slightly enhanced against the one via $W^-$ due to the charge asymmetry in the initial state.) However, in any case, the production of another slepton pair ${\widetilde{l}}^{\pm}\,{\widetilde{\nu}}_{l}$ or ${\widetilde{l}}^{+}{\widetilde{l}}^{-}$ decaying into a pair of ${{\widetilde{\tau}}}_1$ does not have the potential to exceed the direct DY production drastically.

Production of neutralinos and charginos is accessible at $\mathcal{O}(\alpha^2)$ either via neutral and charged current DY 