Regular Article - Theoretical Physics
Charge-exchange reactions from the standpoint of the parton model
SRC Institute for High Energy Physics of NRC “Kurchatov Institute”, 142281, Protvino, Russia
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Accepted: 26 October 2015
Published online: 23 November 2015
Using simple arguments, we show that charge-exchange reactions at high energies go through the hard scattering of fast quarks. On this basis we describe and , , in a combined approach which defines hard contributions in the parton model and soft ones in Regge phenomenology. The disappearance of a dip according to recent GAMS- data in the differential cross-section at (GeV/c)2 at transition to relatively high momenta, is explained as a manifestation of a mode change of summation of hard contributions from coherent to incoherent. Other manifestations of the mentioned mode change are discussed. Constraints on the - mixing and gluonium admixture in are obtained.
© SIF, Springer-Verlag Berlin Heidelberg, 2015