two dimensional change of variable

by isoura   Last Updated September 11, 2019 19:20 PM

\begin{equation} \frac{1}{(2\pi)^2}\int{\frac{\sin^2(q(x_1-x_2))}{q^2}d^2q} \end{equation} The notation $d^n x_k$ to indicate integral over the n coordinates of a point in $\mathbb{R}^n$. How to perform the integration of the integral above?



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