A simple way to look at this is that Force = Mass x Acceleration is a way of saying "The heaviest mass you can swing at the fastest speed will produce the most force"
However, Cricket Bat performance is a culmination of many factors and size is perhaps the least important given that you are at the mercy of the limitations of the material.
An extremely stiff Cricket Bat would be phenomenally uncomfortable to use, there has to be balance.
There is no objective evidence to support the Big Bat Myth, it's all anecdotal. Even this can be undermined by a wealth of examples of small profiled Cricket Bats subjectively outperforming their larger counterparts.
Find a Cricket Bat that suits the way you play.