# Evaluating a sinc-integral

1. Jan 23, 2012

### Demon117

Howdy. I am trying to determine the scattering amplitude from a repulsive potential given by $V(r) = \frac{A}{r^{2}}$. What I have so far is this:

$f = -\frac{4\pi\mu}{2\pi\hbar^{2}}\int_{0}^{\infty} \frac{(sin(kr))}{kr} dr$

I know this is a sinc-integral, but I am not quite sure how to evaluate those since I've never come across them. One resource suggests that its done by contour integration but I fail to see the connection. If you could, please guide me through this process or at least give me a resource that explains this.

Last edited: Jan 23, 2012
2. Jan 23, 2012

### obafgkmrns

3. Jan 25, 2012

### Demon117

That link helped a lot. Thanks!