Gauge invariance in quantum hadrodynamics
- Department of Physics, College of William and Mary, Williamsburg, Virginia 23187-8795 (United States)
This paper describes the derivation of a new representation of an SU(2){sub L}{times}SU(2){sub R} locally invariant model of the strong interactions called quantum hadrodynamics 3 (QHD-III). QHD-III is a gauge-invariant theory based on the linear {sigma} model, the gauge bosons being the {bold {rho}} and the {bold {ital a}}{sub 1}. The new representation considerably simplifies the Lagrangian. To derive the new representation, the gauge invariance of the model is exploited. The role of the gauge boson masses in gauge-invariant models of the strong interactions based on the {sigma} model is also discussed, and it is shown that these masses are necessary if the pion is to survive as a physical field. {copyright} {ital 1999} {ital The American Physical Society}
- OSTI ID:
- 336707
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 4 Vol. 59; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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