Influence of the
![\vec nn](/img/latex/0f/0ff6f7f07c14e0a0c0ab7c738a125de5-v2.png)
-channel on the properties of a proton-antiproton atom
Mur V.D. , Kudryavtsev A.E., Popov V.S.
The influence of the second channel (nh~) on nuclear level shifts and the probabilities of radiative transitions in the pp atom are determined. The obtained formulas can also be used for other hadronic atoms (Σ ~ρ, Κ ρ, etc.).