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The tunneling ionization of exotic atoms such as muonic hydrogen, muonium andpositronium in a strong laser field of circular polarization is investigatedtaking into account the impact of the motion of the center of mass on the thetunneling ionization dynamics. The momentum partition between the ionizationproducts is deduced. The effect of the center of mass motion for the momentumdistribution of the ionization components is determined. The effect scales withthe ratio of the electron (muon) to the atomic core masses and is nonnegligiblefor exotic atoms, while being insignificant for common atoms. It is shown thatthe electron (muon) momentum shift during the under-the-barrier motion due tothe magnetically induced Lorentz force has a significant impact on the momentumdistribution of the atomic core and depends on the ratio of the electron to theatomic core masses.

Momentum partition between constituents of exotic atoms during laser induced tunneling ionization