Multiplicity of Charged Secondaries in Interactions of Protons in an Emulsion at 400-GeV/c

The preliminary results on multiplicities of charged secondaries in proton-nucleus interactions at 400 Gev/c are presented. Multiplicity of produced particles is consistent in the first approximation with the KNO scaling hypothesis for hadron-nucleus interactions. The relations between different moments of multiplicity distribution in proton-nucleons interactions at high energies are discussed too

Coherent Production of Charged Particles on Nuclei by 400-GeV/c Protons

Topological cross sections {delta}{sub coh}{sup (n)} (n = 1,3,5 and 7) of coherent diffractive dissociation of 400 Gev/c protons on nuclei of photoemulsion elements have been measured. Topological cross sections increase in the energy range from 20 to 400 Gev/c. This growth is the most noticeable for multiprong topologies. The total cross section of diffractive coherent production also increases from 8 to 25 mb/nucleus in this energy range. The increasing of the average multiplicity of charged particles in reaction of coherent proton dissociates is consistent with the logarithmic law <n>{sub coh} = (90.25 {+-} 0.05) inp. + (1.3 {+-} 0.25)

Coherent Production of Particles by Protons at 200-GeV/c on Emulsion Nuclei

The coherent diffraction production process is characterized by a very narrow angular distribution of secondary particles that is caused by a small 4-momentum transferred to the nuclei. Besides, they have neither excitation of nuclei, nor disintegration. The quantum numbers of the coherently produced system are the same as those of the incident particle. For proton coherent interactions the number of charged particles must be odd. In this work are presented the data about a cross section for production of three, five and seven charged particles at 200 Gev/c, the energy dependence of these cross sections as angular characteristics of the secondary particles in coherent reactions