Abstract
The theoretical possibility that in a limited domain in space the expectation value of a neutral spin-0 field may be abnormal (that is to say quite different from its normal vacuum expectation value) is investigated. It is shown that if the coupling is sufficiently large, then such a configuration can be metastable, and its physical size may become substantially greater than the usual microscopic dimension in particle physics. Furthermore, independent of the strength of the coupling, if has sufficiently strong scalar interaction with the nucleon field, the state that has an abnormal inside a very heavy nucleus can become the minimum-energy state, at least within the tree approximation; in such a state, the "effective" nucleon mass inside the nucleus may be much lower than the normal value. Both possibilities may lead to physical systems that have not yet been observed.
- Received 17 January 1974
DOI:https://doi.org/10.1103/PhysRevD.9.2291
©1974 American Physical Society