Theta - vacuum of the bosonized massive light front Schwinger model
Oct, 1998Citations per year
Abstract:
The massive Schwinger model in bosonic representation is quantized on the light front using the Dirac--Bergmann method. The non-perturbative theta- vacuum in terms of coherent states of the gauge-field zero mode is derived and found to coincide with the massless case. On the other hand, the mass term becomes highly non-linear due to the constrained zero mode of the scalar field. A non-trivial mixing between the normal-mode and zero-mode sectors of the model is crucial for the correct calculation of the theta-dependence of the leading order mass correction to the chiral condensate.Note:
- 9 pages, LaTeX
- 11.10.Ef
- 11.15.Tk
- 11.15-q
- Schwinger model
- dimension: 2
- quantization: light front
- Hamiltonian formalism
- bosonization
- vacuum state: Theta parameter
- coherent state
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