During the jet call, Renee pointed out the need to estimate the contamination of the pion signal from kaons, protons, and electrons. She suggested I follow Rob's technique of the three-Gaussian fit to the n_σ(π) distribution.

Figure 1

In Fig. 1 I post the result of the three-Gaussian fit. The contamination is quite small with the following resulting integrals:

Table 1

Thus, from the n_σ(π) distribution I estimate a dilution of well-less than 5%.