Energy flow in interjet radiation -: art. no. 094031

We study the distribution of transverse energy, Q(Omega), radiated into an arbitrary interjet angular region Omega in high-p(T) two-jet events. Using an approximation that emphasizes radiation directly from the partons that undergo the hard scattering, we find a distribution that can be extrapolated smoothly to Q(Omega)=Lambda(QCD), where it vanishes. This method, which we apply numerically in a valence quark approximation, provides a class of predictions on transverse energy radiated between jets, as a function of jet energy and rapidity, and of the choice of the region Omega in which the energy is measured. We discuss the relation of our approximation to the radiation from unobserved partons of intermediate energy, whose importance was identified by Dasgupta and Salam.