Four-body calculation of energy levels of muonic molecule dtμe in muon catalyzed fusion

We investigate dtμe (= d + t + μ + e) four-body system which includes the most important bound states (dtμ)11 in muon catalyzed fusion (μCF). We directly estimate the energy shift more accurately than the previous perturbation calculation. The shift found to be one order of magnitude larger than previous calculation and to be more significant in the calculation of the μCF reaction rate.