Semiclassical Calculation of Multiparticle Scattering Cross Sections in Classicalizing Theories

Understand

It has been suggested in arXiv:1010.1415 that certain derivatively coupled non-renormalizable scalar field theories might restore the perturbative unitarity of high energy hard scatterings by classicalization, i.e.

• formation of multiparticle states of soft quanta.
• Here we apply the semiclassical method of calculating the multiparticle production rates to the scalar Dirac-Born-Infeld (DBI) theory which is suggested to classicalize.
• We find that the semiclassical method is applicable for the energies in the final state above the cutoff scale of the theory L_*^{-1}.