Polarization of Vector Mesons Produced in Nucleon-Nucleon Collisions

摘要: The polarization of vector mesons produced in free nucleon-nucleon collisions near the threshold is studied. calculation made under Born approximation, assuming a phenomenological nuclear potential obtained from $n\ensuremath{-}p$ scattering data for interaction between nucleons. meson shown to be completely polarized (to order $\frac{m}{M}$) parallel direction motion incoming nucleon coupling and nucleon, perpendicular this tensor coupling; similar by force field, as studied Wentzel. In particular, same effect exist reactions $p+p\ensuremath{\rightarrow}p+n+{\ensuremath{\pi}}^{+}$ $n+n\ensuremath{\rightarrow}p+n+{\ensuremath{\pi}}^{\ensuremath{-}}$ when final proton neutron fall into $^{3}s$ or $^{1}s$ deuteron states. angular distribution out-going nucleons baricentric system inverse can employed means detecting mesons. Cross sections these are also estimated.