2014
Elementarity of composite systems
Phys. Rev. C
- ,
- Volume
- 90
- Number
- 6
- First page
- 065201
- Last page
- 065201
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.1103/PhysRevC.90.065201
- Publisher
- AMER PHYSICAL SOC
The "compositeness" or "elementarity" is investigated for s-wave composite states dynamically generated by energy-dependent and independent interactions. The bare mass of the corresponding fictitious elementary particle in an equivalent Yukawa model is shown to be infinite, indicating that the wave function renormalization constant Z is equal to zero. The idea can be equally applied to both resonant and bound states. In a special case of zero-energy bound states, the condition Z = 0 does not necessarily mean that the elementary particle has the infinite bare mass. We also emphasize arbitrariness in the "elementarity" leading to multiple interpretations of a physical state, which can be either a pure composite state with Z = 0 or an elementary particle with Z not equal 0. The arbitrariness is unavoidable because the renormalization constant Z is not a physical observable.
- Link information
- ID information
-
- DOI : 10.1103/PhysRevC.90.065201
- ISSN : 0556-2813
- eISSN : 1089-490X
- ORCID - Put Code : 82813850
- Web of Science ID : WOS:000346441100009