Invariant mass plots are shown with shower shape substitution being applied with Data Driven Maker (thanks Ilya).

Data Sample ->  Data Driven QCD events jets located here. Partonic pt range 3-55 GeV.  Weigting done based on Michael's page.

Figure 1:  Generated parton pT distribution (to check weighting).

Figure 2: Invariant mass distribution for all pion pT bins (irrelevant overall scale).  Fitting is done with a simple  exponential+gaussian.

Figure 3:  Invariant mass distributions broken down into different pion pT bins (irrelevant overall scales).