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## Homework Statement

The elastic form factors of the proton are well described by the form

G(q

^{2}) = [itex]\frac{G(0)}{(1 + (\frac{q^{2}}{0.71})^{2}}[/itex]

with q

^{w}in GeV

^{2}. Show that an exponential distribution in the proton given by

ρ(r) = ρ

_{o}e

^{-λr}

## Homework Equations

thought it to be the simple integral

## The Attempt at a Solution

The integral

G(q

^{2}) = ∫∫∫ ρ(r)*e^(-iqrcosθ)*r

^{2}sinθ*drdθd∅

phi is 0 to 2pi

theta is 0 to pi

r is 0 to ∞

the problem is the r integral

G(q

^{2}) = a∫ r*sin(qr)*e^(-λr)

a are the constants combined into 1 term

I've done a problem similar with the Yukawa potential, but the Yukawa potential eliminated the r next to the sin(qr) which made it solvable.

not sure if i have done something wrong or what.

any help would be appreciated