High-$p_{\perp }$ Jets in Diffractive Electroproduction

The diffractive production of high-$p_{\perp }$ jets in deep-inelastic scattering is studied in the semiclassical approach. The $p_{\perp }$-spectra of $q\bar{q}$ and $q\bar{q}g$ diffractive final states are found to be qualitatively different. For $q\bar{q}$ final states, which are produced by hard' colour-singlet exchange, the $p_{\perp}$-spectrum is much softer than for $q {\bar q} g$ final states, where the colour neutralization is soft’. Furthermore, the two different final states can be clearly distinguished by their diffractive mass distributions.