Heterotic string dynamics in the solvable Lie algebra gauge Original Research Article

A revision of the toroidal Kaluza–Klein compactification of the massless sector of the image heterotic string is given. Under the solvable Lie algebra gauge the dynamics of the image symmetric space sigma model which is coupled to a dilaton, N Abelian gauge fields and the Chern–Simons type field strength is studied in a general formalism. The results are used to derive the bosonic matter field equations of the massless sector of the D-dimensional compactified image heterotic string.