Introduce CSS_EVOLUTION_SCHEME=2,3 which are equivalent to 0,1 but take masses into account.
As discussed in the dev meeting today, we would like to add options CSS_EVOLUTION_SCHEME=[2,3]
, both of which take masses into account for the evolution variable and are otherwise identical to CSS_EVOLUTION_SCHEME=[0,1]
.
This was discussed and implemented in the context of ttbb/ttjets and Vbb/Vjets with @johannes_krause and @shoeche. It would be good to include CSS_EVOLUTION_SCHEME=3
in the master benchmarking (@ebothmann, with setups added by @dnapoletano) to decide whether we want to make it the default, since it seems to perform best for V+HF compared to data.
@shoeche mentioned that Dire has an evolution variable which takes this into account already, so it should be fine to do this only for CSS/MCATNLO and still be able to compare to Dire.