Vertex Y vs X for BES MC sample

 
Plot showing the vertex position (y vs x in cm) of the generated events, according to geant.root --> StMcEvent.
Below are attached the two macros used to extract the distributions.

 
Used:
bnl10032_100_100evts.vxy.root
bnl10032_110_100evts.vxy.root
bnl10032_111_100evts.vxy.root
bnl10032_112_100evts.vxy.root
bnl10032_113_100evts.vxy.root
bnl10032_114_100evts.vxy.root
bnl10032_115_100evts.vxy.root