Incorrect Amp4Body_TD normalization with efficiency

[thboettc]

Amp4Body_TD performs normalization by calculating the average value of the CF and DCS amplitudes with a MC dataset, calculating the average cofficients for the cos, cosh, sin, and sinh terms of the decay time distribution. Then an analytical integral is performed in decay time for each of these terms. This is only valid if the decay-time-dependent and phasespace-dependent factors of these terms factorize. This does not hold if the efficiency correction is correlated in decay time and phasespace. Correctly calculating the normalization requires calculating the average value of the full 6D time-dependent amplitude model.

FYI @FlorianReiss @JuanBSLeite @cpappenheimer. Let me know if I'm missing something. It seems like @jcob95 might have also been seeing the effects of this issue, and maybe event solved it?