  A previously conjectured set of exact form factors of boundary exponential
operators in the sinh-Gordon model is tested against numerical results from
boundary truncated conformal space approach in boundary sine-Gordon theory,
related by analytic continuation to sinh-Gordon model. We find that the
numerical data strongly support the validity of the form factors themselves;
however, we also report a discrepancy in the case of diagonal matrix elements,
which remains unresolved for the time being.

High Energy Physics - Theory;Other Condensed Matter