We calculate the cross sections for dissociation of J/ψ by pions and ρ-mesons within the framework of a meson exchange model. We find that these cross sections are small at center-of-mass energies less than 1 GeV above threshold, and that dissociation rates are less than 0.01 c/fm in a thermal meson gas at temperatures where such a description makes sense.Typeset using REVT E X 1

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This paper reviews the application of optical and UV laser radiation to several topics in low-energy nuclear physics. We consider the laser-induced nuclear anti-Stokes transitions, the laser-assisted and the laser-induced internal conversion, and the Electron Bridge and Inverse Electron Bridge mechanisms as tools for deexciting and exciting of low-lying nuclear isomeric states. A study of the anomalous, by low-lying, nuclear isomeric states (on an example of the 229 Th nucleus) is presented in detail.

We discuss the multiplicity distribution for highest accessible energies of pp-andpp-interactions from the point of view of the multiparton collisions.The inelastic cross sections for the single, σ 1 , and multiple (double and, presumably, triple, σ 2+3 ) parton collisions are extracted from the analysis of the experimental data on the multiplicity distribution up to the Tevatron energies. It follows that σ 1 becomes energy independent while σ 2+3 increases with √ s for √ s ≥ 200 GeV. The observed growth of p ⊥ with multiplicity is attributed to the increasing role of multiparton collisions for the high energȳ pp(pp)-inelastic interactions.13.85.Hd

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