- #1
jouvelot
- 53
- 2
Hello everyone,
Still working on my reading of Weinberg's Lecture notes on QM book. At one point, the following integral $$\int d^3 xd^3 x' V(\vec{x~}) V(\vec{x'}) / |\vec{x~} - \vec{x'}|^2$$ has to be computed in the case where ##V(r) = -e^{-r/R}/r##. This reminds me of retarded potentials, but I don't have my other books with me, and cannot find a way to compute this integral. I've been trying with some residues, but this is unwieldy. The result should be ##8\pi^2 R^2##.
Thanks for any hints that would help me compute it.
Bye,
Pierre
Still working on my reading of Weinberg's Lecture notes on QM book. At one point, the following integral $$\int d^3 xd^3 x' V(\vec{x~}) V(\vec{x'}) / |\vec{x~} - \vec{x'}|^2$$ has to be computed in the case where ##V(r) = -e^{-r/R}/r##. This reminds me of retarded potentials, but I don't have my other books with me, and cannot find a way to compute this integral. I've been trying with some residues, but this is unwieldy. The result should be ##8\pi^2 R^2##.
Thanks for any hints that would help me compute it.
Bye,
Pierre