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arXiv · hep-ph/9911374

Dynamical resummation and damping in the O(N) model

A. Jakovac
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Abstract

A general real-time formalism is developed to resum the self-energy operator of broken symmetry scalar field theories in form of self-consistent gap equations for the spectral function. The solution of the equations is approximated with finite lifetime quasi-particles. In the Landau damping rates viscosity terms, analogous to gauge theories, appear, what leads to a finite damping rate for the long wavelength Goldstone modes.

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A. Jakovac. 1999-11-16. Dynamical resummation and damping in the O(N) model. https://arxiv.org/abs/hep-ph/9911374

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