REGGEONS IN DIFFRACTIVE INTERACTIONS IN DEEP INELASTIC SCATTERING AT HERA

The “triple-Regge” analysis of subleading Reggeon contributions to the diffractive structure function in DIS at HERA is presented. The recently published data allow to determine the only free parameter of the analysis related to the ratio of the RRℙ and ℙℙℙ couplings. The large value of this ratio is prefered which is in agreement with analyses of soft hadronic interactions. The role of the subleading Reggeons as well as pions for the fast forward neutron production in diffractive processes is estimated. The forward πN state production is also discussed.