The cuts are DCA < 2.0 , frac_seen > 0.1 , Nhits > 20 , PID = v1.1
most probable
Multiplicity 2 represents 6.0 < b < 8.0 fm
Multiplicity 3 represents 4.0 < b < 6.0 fm
Multiplicity 4 represents 2.0 < b < 4.0 fm
Multiplicity 5 represents 0.0 < b < 2.0 fm
Acceptance
2 AGeV Au+Au 
