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Multiple choice
In the Born approximation, a Yukawa-type potential gives scattering amplitude
f
=
−
β
/
(
μ
2
+
q
2
)
f = -\beta / (\mu^2 + q^2)
f
=
−
β
/
(
μ
2
+
q
2
)
, where
q
=
2
k
sin
(
θ
/
2
)
q = 2 k \sin(\theta/2)
q
=
2
k
sin
(
θ
/2
)
is the momentum transfer. With
β
=
1
\beta = 1
β
=
1
,
μ
=
1
\mu = 1
μ
=
1
,
k
=
1
k = 1
k
=
1
, and backscattering at
θ
=
π
\theta = \pi
θ
=
π
, what is
f
f
f
?
0.2
-1
-0.333
-0.2
Check answer