Plot illustrating the "bin-counting" method used to extract the raw yields It corresponds to the invariant mass distribution of $\Kzs$ for the $\pT$ bin $[0.4-0.5] $GeV/c The hashed regions show where the background is sampled; they are chosen to be $6\sigma$ away from the signal approximated with a Gaussian distribution The averaged or fitted background is subtracted from the signal region of $\pm 4\sigma$.