I plot the corelation of ADC sum of pr1 vs pr2, and apply a cut on Gas Cerenkov (L.cer.asum_c>400, which means only electron). The graph shows that there are many electrons mix into pion ADC of the pion rejectors. And the big spot on pr2 axis also shows an unreasonable figure -- electrons deposite more energy on pr2 but not pr1!
We guess there may have some mis-cabling issue or wrong decoding.
Figure 1