If (lim _{k ightarrow 0} mathcal{F}_{l}^{+}(k) / k^{2}) is constant for (l) even, find the (k

If \(\lim _{k \rightarrow 0} \mathcal{F}_{l}^{+}(k) / k^{2}\) is constant for \(l\) even, find the \(k \rightarrow 0, r \rightarrow \infty\) behavior with \(k\) of \(\phi_{l}(k ; r)\) for even \(l\).