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arXiv · hep-ph/0702255

Spontaneous Breakdown of U(1) symmetry in DLCQ without Zero Mode

Aiichi Iwazaki
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Abstract

We show that the spontaneous breakdown of U(1) symmetry in a Higgs model can be described in discretized light cone formulation even by neglecting zero mode. We obtain correctly the energy of a ground state with the symmetry breakdown. We also show explicitly the presence of a Goldstone mode and its absence when the U(1) symmetry is gauged. In spite of obtaining the favorable results, we lose a merit in the formulation without zero modes that a naive Fock vacuum is the true ground state.

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Aiichi Iwazaki. 2007-02-26. Spontaneous Breakdown of U(1) symmetry in DLCQ without Zero Mode. https://doi.org/10.1103/physrevd.75.105009

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