QED$ {4}$ Ward Identity for fermionic field in the light-front - High Energy Physics - TheoryReport as inadecuate




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Abstract: In a covariant gauge we implicitly assume that the Green-s functionpropagates information from one point of the space-time to another, so that theGreen-s function is responsible for the dynamics of the relativistic particle.In the light front form, which in principle is a change of coordinates, onewould expect that this feature would be preserved. In this manner, thefermion-s field propagator can be split into a propagating piece and anon-propagating ``contact- term. Since the latter ``contact- one does notpropagate information, and therefore, assumedly with no harm to the fielddynamics we wanted to know what would be the impact of dropping it off. To dothat, we investigated its role in the Ward identity in the light front.



Author: J. H. O. Sales, A. T. Suzuki, J.D. Bolzan

Source: https://arxiv.org/







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