Dirac and Faddeev-Jackiw quantization of a five-dimensional St\"ueckelberg theory with a compact dimension

TL;DR

This paper performs a Hamiltonian analysis of a five-dimensional St"uckelberg theory with a compact dimension, reducing it to four dimensions with Kaluza-Klein modes, and compares Dirac and Faddeev-Jackiw quantization methods.

Contribution

It provides a detailed Hamiltonian and quantization analysis of a five-dimensional St"uckelberg theory with a compact dimension, including a comparison of Dirac and Faddeev-Jackiw brackets.

Findings

The theory reduces to four-dimensional St"uckelberg plus Kaluza-Klein modes.

Dirac and Faddeev-Jackiw brackets are equivalent.

Presence of pseudo-Goldstone bosons in the gauge-fixed theory.

Abstract

A detailed Hamiltonian analysis for a five-dimensional St{\"{u}}eckelberg theory with a compact dimension is performed. First, we develop a pure Dirac's analysis of the theory, we show that after performing the compactification, the theory is reduced to four-dimensional St{\"{u}}eckelberg theory plus a tower of Kaluza-Klein modes. We develop a complete analysis of the constraints, we fix the gauge and we show that there are present pseudo-Goldstone bosons. Then we quantize the theory by constructing the Dirac brackets. As complementary work, we perform the Faddeev-Jackiw quantization for the theory under study, and we calculate the generalized Faddeev-Jackiw brackets, we show that both the Faddeev-Jackiw and Dirac's brackets are the same. Finally we discuss some remarks and prospects.