The Mass Operator in the Light-Cone Representation

Details The Mass Operator in the Light-Cone Representation The Mass Operator in the Light-Cone Representation

1998-05-29

arxiv.org/abs/hep-th/9805219v1

Phys.Rev. D60 (1999) 105004

Physics

High Energy Physics

High Energy Physics - Theory

Revtex, 8 pages

Scientific paper

10.1103/PhysRevD.60.105004

I argue that for the case of fermions with nonzero bare mass there is a term in the matter density operator in the light-cone representation which has been omitted from previous calculations. The new term provides agreement with previous results in the equal-time representation for mass perturbation theory in the massive Schwinger model. For the DLCQ case the physics of the new term can be represented by an effective operator which acts in the DLCQ subspace, but the form of the term might be hard to guess and I do not know how to determine its coefficient from symmetry considerations.

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