Comparation between FMS triggered data and simulation in p+p

(1) FMS Selections

   1, in data, using FMS triggered data, selec at least one reconstructed pi0 in the FMS with pt > 2.0GeV/c.

   2, in simulation, applying FMS acceptance cuts for pi0 decayed photons, and requiring the pi0 with pt > 2.0GeV/c.

(2) BBC requirement

   East BBC charge sum non-zero and west BBC charge sum non-zero.

(3) Results

     Using STAR library SL11b, and the tower threshold 250MeV. The following plots show the ratios of values in new simulation over the same parameters in the old simulation.

    1, EEMC

        Figure1, EEMC tower multiplicity shown in the left and tower energy (normalized by events) shown in the right above 250MeV.

      Figure2, EEMC zvertex distribution (left) and the single cluster energy (right).

2, BEMC

      Figure3, BEMC tower multiplicity shown in the left and tower energy (normalized by events) shown in the right above 250MeV.

    Figure4, BEMC zvertex distribution (left) and the single cluster energy (right).

Conclusion:

    The energy scales in old and new simulations are generally consistent.