Twiddle definition
Twiddle means factor of 2-ish. "Much greater" means parametrically [INAUDIBLE] or much less than. And just with those two symbols, there's some freedom. These are different ways of doing an estimate for what lambda chi are, just saying that there is that freedom, and you have to do the full calculation in a particular channel to really figure out-- or a particular piece of phenomenology-- what the lambda is. Extract it from data if you like.