Renormalization of the rotational constants of an ammonia molecule seeded into a 4He droplet

► Calculations find quantitative agreement with experiments for the renormalization of the rotational constant of an ammonia molecule in a helium 4 droplet. ► Supports the conclusions of the recent experimental study that a previous experiment over-estimated the extent of renormalization. ► Extends adiabatic node diffusion Monte Carlo method beyond linear molecules.