Parton bremsstrahlung as a mechanism of soft hadronic interactions at high energies

摘要

The microscopic mechanism of soft hadronic collisions at high energy is not well understood at present. In the most popular string-like models of hadron interactions, see e.g. (1), this mechanism is associated with nonperturbative sector of QCD. Namely, the energy is deposited due to the string length increase and the subsequent string decay. The aim of this note is to the discuss the mechanism from the quite different point of view which is very close in spirit to the perturbative QCD. Accoridng to our picture the substantial energy loss of interacting hadron is due to multiple bremsstrahlung in parton-parton collisions. We assume that the time-scale of parton-parton collison is much shorter than the hadronization scale. In other words, we extrapoalte the scenario which is justified in hard hadron collisions to the soft interactions. Such picture of hadron processes has been advocated in Ref. 2.