Ground state energy shift in the proton-antiproton atom
Kerbikov B.O.
We have obtained limits on the isosinglet and isotriplet scattering lengths for NN based on energy shift data for the ground state of the proton-antiproton atom. A technique is indicated for finding the nuclear level binding energy in the NN system based on the shift of the atomic IS state and one of the NN scattering lengths.