Hi, so for example in the figure below the missing mass squared has been calculated under the assumption of the detection of a pi+ particle decaying from a K+. What I am wondering is what is it that's bounding all the decays at 0.122 GeV2? And for the decays at all, what is e.g. bounding the pi+pi+pi- (black line) decay? I figured the lowest value, around 0.078, is around the squared mass of two pions? Not sure though. Appreciate any help.