Massive poles in Lee-Wick quantum field theory
High Energy Physics - Theory
2019-04-03 v2 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
Most discussions of propagators in Lee-Wick theories focus on the presence of two massive complex conjugate poles in the propagator. We show that there is in fact only one pole near the physical region, or in another representation three pole-like structures with compensating extra poles. The latter modified Lehmann representation is useful caculationally and conceptually only if one includes the resonance structure in the spectral integral.
Cite
@article{arxiv.1812.03603,
title = {Massive poles in Lee-Wick quantum field theory},
author = {John F. Donoghue and Gabriel Menezes},
journal= {arXiv preprint arXiv:1812.03603},
year = {2019}
}
Comments
10 pages, 8 figures. Version 2 has an improved drawing of Fig. 3