Tuesday 27 January 2015

integration - Integral of sine multiplied by Bessel function with complicated argument

I need a help with integral below,
$$ \int_0^\infty \sin(ax)\ J_0\left(b\sqrt{1+x^2}\right)\ \mathrm{d}x, $$
where $a,b > 0 $ and real, $J_0(x)$ is the zeroth-order of Bessel function of the first kind.




I found some integrals similar to the integral above, but I don't have any idea on how to apply it. Here are some integrals that might help.
$$ \int_0^\infty \cos(ax)\ J_0\left(b\sqrt{1+x^2}\right)\ \mathrm{d}x = \frac{\cos\sqrt{b^2-a^2}}{\sqrt{b^2-a^2}}; \mathrm{~~for~0 < a < b} $$



$$ \int_0^\infty \sin(ax)\ J_0(bx)\ \mathrm{d}x = \frac{1}{\sqrt{a^2-b^2}}; \mathrm{~~for~0 < b < a} $$



The proof of the first integral can be seen here.

No comments:

Post a Comment

real analysis - How to find $lim_{hrightarrow 0}frac{sin(ha)}{h}$

How to find $\lim_{h\rightarrow 0}\frac{\sin(ha)}{h}$ without lhopital rule? I know when I use lhopital I easy get $$ \lim_{h\rightarrow 0}...