The momentum dependent Kβ-nucleus optical potentials are obtained based
on the relativistic mean-field theory. By considering the quarks coordinates of
Kβ meson, we introduced a momentum-dependent "form factor" to modify the
coupling vertexes. The parameters in the form factors are determined by fitting
the experimental Kβ-nucleus scattering data. It is found that the real
part of the optical potentials decrease with increasing Kβ momenta, however
the imaginary potentials increase at first with increasing momenta up to
Pkβ=450βΌ550 MeV and then decrease. By comparing the calculated Kβ mean
free paths with those from Kβn/Kβp scattering data, we suggested that the
real potential depth is V0ββΌ80 MeV, and the imaginary potential parameter
is W0ββΌ65 MeV.Comment: 9 pages, 4 figure