Journal article
Constraints of Cluster Separability and Covariance on Current Operators
Few-body systems, Vol.52(3), pp.427-430
05/2012
DOI: 10.1007/s00601-011-0302-1
Abstract
Realistic models of hadronic systems should be defined by a dynamical unitary representation of the Poincaré group that is also consistent with cluster properties and a spectral condition. All three of these requirements constrain the structure of the interactions. These conditions can be satisfied in light-front quantum mechanics, maintaining the advantage of having a kinematic subgroup of boosts and translations tangent to a light front. The most straightforward construction of dynamical unitary representations of the Poincaré group due to Bakamjian and Thomas fails to satisfy the cluster condition for more than two particles. Cluster properties can be restored, at significant computational expense, using a recursive method due to Sokolov. In this work we report on an investigation of the size of the corrections needed to restore cluster properties in Bakamjian–Thomas models with a light-front kinematic symmetry. Our results suggest that for models based on nucleon and meson degrees of freedom these corrections are too small to be experimentally observed.
Details
- Title: Subtitle
- Constraints of Cluster Separability and Covariance on Current Operators
- Creators
- W Polyzou - University of IowaB Keister - Division of Physics
- Resource Type
- Journal article
- Publication Details
- Few-body systems, Vol.52(3), pp.427-430
- DOI
- 10.1007/s00601-011-0302-1
- ISSN
- 0177-7963
- eISSN
- 1432-5411
- Publisher
- Springer Vienna
- Language
- English
- Date published
- 05/2012
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199743602771
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