$\mu^2/Q^2,$ to find such an aligned jet configuration in the wavefunction of $\gamma^*.$ (More probable configurations in the $\gamma^*$ have smaller interaction probabilities. While the aligned jet model cannot be expected to be a precise model of deeply inelastic scattering it should reasonably characterize a significant portion of deep inelastic events.)

The inelastic reaction of this, longitudinally asymmetric, quark-antiquark pair with the proton should produce a shadow quark-antiquark pair in the final state. If the center of the proton is relatively black to the incoming quark-antiquark pair the shadow may be rather strong, as in the hadronic case discussed above, and unitarity limits may aleady be reached at present energies. The outgoing quark-antiquark pair should show up as a diffractively produced state, of mass $M_x \approx Q,$ following the direction of the $\gamma^*.$ Assuming that the scattering amplitude of the quark-antiquark pair with the proton is imaginary one may reconstruct this amplitude, dropping an i, as

$$F(x,\b{b}) = \int d^2p e^{i\b{p}\cdot \b{b}}{\sqrt{{d\sigma_{SD}\over
d^2p}}}\eqno(3.1)$$

with $\b{b}$ the impact parameter of the collision and $\b{p}$ the momentum transfer to the recoil proton. ${d\sigma_{SD}\over d^2p}$ is the single diffractive cross section for $M_x\approx Q.$

In the present circumstance we do not have good 