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. There 27 pp runs.

   2, in simulation, applying FMS acceptance cuts for pi0 decayed photons, and requiring the pi0 with pt > 2.0GeV/c. Using the latest generated p+p FMS filtered simualtion.

(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 red distributions are using simulation and the blue distributions are using data.

    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).

                                                                      Figure3, EEMC cluster pairs mass.

2, BEMC

      Figure4, BEMC tower multiplicity shown in the left and tower energy (normalized by events) shown in the right above 250MeV.

    Figure 5, BEMC zvertex distribution (left) and the single cluster energy (right).

     Figure 6, BEMC cluster pair invariant mass.

Conclusion:

    The differences between simulation and data are smaller than previous.