Neutral 3-body system in a strong magnetic field: factorization and   exact solutions
  Neutral systems containing two identical particles, in homogeneous magnetic field are shown to obey exact factorizable solutions both in nonrelativistic and relativistic formalism, similarly to the neutral two-body systems. Concrete examples of the helium atom and the neutron as a (ddu) system are considered. 
Yu. A. Simonov (Institute of Theoretical and Experimental Physics,   Moscow, Russia)
hep-ph nucl-th