Abstract
Two-proton decays of and ground states are studied in a three-body model. We have found that the two-proton widths for the states should be much less than the existing experimental values (about 10 times for and about 100 times for ). We also have found that the structure of these states differs significantly from the mirror isobaric analog states (IAS): breaking of isobaric symmetry is at the level of tens of percents. Together with a corresponding decrease of the Coulomb energy, this effect can be considered as a three-body mechanism of the Thomas-Ehrman shift.
- Received 3 May 2001
DOI:https://doi.org/10.1103/PhysRevLett.88.042502
©2002 American Physical Society