Indication of asymptotic scaling in the reactions dd → p3H, dd → n3He, and pd → pd

It is shown that the differential cross sections of the reactions dd → n ³He and dd → p ³H measured at a c.m.s. scattering angle θ_cm = 60° in the interval of the deuteron beam energy 0.5–1.2 GeV demonstrate the scaling behavior dσ/dt ∼ s ⁻²², which follows from constituent quark counting rules. It is found also that the differential cross section of the elastic dp → dp scattering at θ_cm = 125°–135° follows the scaling regime ∼s ⁻¹⁶ at beam energies 0.5–5 GeV. These data are parameterized here using the Reggeon exchange. From Pis’ma v Zhurnal éksperimental’noĭ i Teoreticheskoĭ Fiziki, Vol. 81, No. 7, 2005, pp. 387–390. Original English Text Copyright ? 2005 by Uzikov. This article was submitted by the author in English.