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arXiv · hep-th/9810029

Theta-Vacuum of the Bosonized Massive Light-Front Schwinger Model

Lubomir Martinovic·James P. Vary
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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.

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Lubomir Martinovic, James P. Vary. 1998-10-05. Theta-Vacuum of the Bosonized Massive Light-Front Schwinger Model. https://doi.org/10.1016/s0370-2693(99)00636-x

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