The differential cross section of Rutherford scattering blows as θ→0. People express this fact as "The Coulombic potential is of long range". But I am seeing the opposite: θ→0 is when the incident particle is not affected by the potential, and therefore a blow when θ→0 means short range potential.
That was first. Secondly, I cannot see how the differential cross section is related to (some kind) of probabilities when infinities are involved.
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