Does there exist $f \in L^1(\mathbb{R}^n)$ s.t., $\displaystyle \widehat{f}(\xi) = \frac{\sin |\xi|}{|\xi|}$ in casercase of dimension $n \ge 3$?
It is known that for $n = 2$, the function $\displaystyle f(x) = \frac{\chi_{\{|x| < 1\}}}{\sqrt{1-|x|^2}}$ curiously has some constant multiple of $\dfrac{\sin |\xi|}{|\xi|}$ as Fourier Transformtransform. Or atleastat least is there a way of finding the fourierFourier transform $\frac{\sin |\xi|}{|\xi|}$ in sense of Temperedtempered distributions for $n \ge 3$?