Hidden dibaryons in one- and two-pion production in NN collisionsстатья

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Дата последнего поиска статьи во внешних источниках: 17 мая 2016 г.

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[1] Platonova M. N., Kukulin V. I. Hidden dibaryons in one- and two-pion production in nn collisions // Nuclear Physics A. — 2016. — Vol. 946. — P. 117–157. Processes of one- and two-pion production in NN collisions are considered in connection with excitation of intermediate dibaryon resonances. In particular, relative contributions of the conventional meson-exchange and dibaryon excitation mechanisms in the reaction pp →dπ^+ are investigated in detail. Inclusion of the intermediate isovector dibaryon resonances is shown to essentially improve the description of experimental data for this reaction, provided the soft meson-baryon form factors consistent with πN elastic scattering are used. Manifestation of the intermediate isoscalar and isovector dibaryons in the two-pion production processes is also studied. The role of the isovector dibaryon resonances in the reaction pp →ppππis discussed for the first time. An explanation of the observed strong differences between two-pion production cross sections in pn and pp collisions based in part on the analysis of dibaryon structure is suggested. [ DOI ]

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