On the boundary form factor program

Details On the boundary form factor program On the boundary form factor program

2006-03-22

arxiv.org/abs/hep-th/0603171v2

Nucl.Phys.B750:179-212,2006

Physics

High Energy Physics

High Energy Physics - Theory

38 pages, 17 eps figures, LaTeX, References added

Scientific paper

10.1016/j.nuclphysb.2006.05.019

Boundary form factor axioms are derived for the matrix elements of local boundary operators in integrable 1+1 dimensional boundary quantum field theories using the analyticity properties of correlators via the boundary reduction formula. Minimal solutions are determined for the integrable boundary perturbations of the free boson, free fermion (Ising), Lee-Yang and sinh-Gordon models and the two point functions calculated from them are checked against the exact solutions in the free cases and against the conformal data in the ultraviolet limit for the Lee-Yang model. In the case of the free boson/fermion the dimension of the solution space of the boundary form factor equation is shown to match the number of independent local operators. We obtain excellent agreement which proves not only the correctness of the solutions but also confirms the form factor axioms.

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