Differential muon-capture rate and the deuterium form factors in the timelike region

The differential muon-capture rate, dΓdEₙ, is obtained over the total allowed range of Eₙ, the neutron energy for both FA, the axial current form factor, analytically continued to the timelike region, and for FA under the condition that FA(q², timelike)=FA(q², spacelike). It is found that a difference of approximately 10% exists in the extreme timelike region. The contribution from the timelike region to the muon-capture rate, Γ, is calculated and found to be negligible.NUCLEAR REACTIONS Muon-capture ²H(μ^-, ν_μ)nn, Γ, dΓdEₙ calculated under different assumptions for form factor behavior in timelike region.