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

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

2007-02-26

arxiv.org/abs/hep-ph/0702255v1

Phys.Rev.D75:105009,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages

Scientific paper

10.1103/PhysRevD.75.105009

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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