Boundary action and profile of effective bosonic strings

Abstract

The mean-square width of the energy profile of bosonic string is calculated considering two boundary terms in the effective action. The perturbative expansion of the Lorentz-invariant boundary terms at the second and the fourth order in the effective action is taken around the free Nambu-Goto string. The calculation are presented for open strings with Dirichlet boundary condition on cylinder.

Comments: 40 pages, 4 Figs