(kalit man lang nagbrownout imbis naa tay gitype ato pero maygani gibalik ra kurenti unsa kaha to lokal o national grid ang fault ipalayo lang unta ang hulga sa rotational brownout labinag gabii nga di ta kagamit og solar) anyway, last april 14 was World Quantum Day, for that occasion let me just refresh myself on Interaction picture and my immediate reliable source is a wiki article but you may resort to more elaborate comprehensive texts
https://en.wikipedia.org/wiki/Interaction_picture
Follow
just a supporting wiki art discussing Dyson operator
https://en.wikipedia.org/wiki/Dyson_series
speaking of Dyson series, it is one of the tools i've used in this exercise that enables me to arrive at (14.7), that stems from the scattering matrix that gives out the probability amplitude expressed ultimately in terms of the final states the draft though is still subject to further improvement
https://foxtrotpaparomeo.wordpress.com/2023/01/11/12012023first-order-calculations-of-the-probability-amplitude-for-higgs-boson-to-electron-positron-decay/