  {\it Ab initio} calculation of the total cross section for the reactions
$^{4}\rm{He}(\gamma,p)^3\rm{H}$ and $^{4}\rm{He}(\gamma,n)^3\rm{He}$ is
presented, using state-of-the-art nuclear forces. The Lorentz integral
transform (LIT) method is applied, which allows exact treatment of the final
state interaction (FSI). The dynamic equations are solved using the effective
interaction hyperspherical harmonics (EIHH) method. In this calculation of the
cross sections the three-nucleon force is fully taken into account, except in
the source term of the LIT equation for the FSI transition matrix element.
