Bullough-Dodd model

The Bullough-Dodd model is an integrable model in 1+1-dimensional quantum field theory. Its
Lagrangian density is

:$mathcal\{L\}=frac\{1\}\{2\}(partial\_muphi)^2-frac\{m\_0^2\}\{6g^2\}(2e^\{gphi\}+e^\{-2gphi\})$

where $m\_0,$ is a mass parameter, $g,$ is the coupling constant and $phi,$ is a real scalar field.

The Bullough-Dodd model belongs to the class of Affine Toda Field Theories.

The spectrum of the model consists of a single massive particle.

ee also

*List of integrable models

References

*R.K. Dodd, R.K. Bullough, Proc.Roy.Soc.Lond. A352, 481, 1977
*A. Fring, G. Mussardo, P. Simonetti, Phys.Lett. B307, 83-90, 1993, arXiv: hep-th/9303108