sPHENIX bulk physics topical group

[Vladimir Bumazhnov <bumaznov AT rcf.rhic.bnl.gov>]

                Dear Daniel,
 I have some questions on sPHENIX_centrality_note_v1.0.pdf :

1)" ΣQ MBD,N > 10 ||  ΣQ MBD,S < 150 " -> I do not understand criteria 
2. Why can be such large assymmetry
 in MBD_N and MBD_S charges in Au+Au ? How were these limits obtained?
According this selection, MBD combination ( ΣQ MBD,N =11, ΣQ MBD,S =500) 
will pass?
"  ΣQ MBD,N < 150 ||  ΣQ MBD,S > 10  " is so possible or not ?

2)have you checked the determination of the events centrality  in the 
simulation? I mean following.
A file of simulated HIJING events with  a set of different impact 
parameters is going through the chain
HIJING -> sPHENIX GEANT4 -> RECONSTRUCTION -> DST-> your centrality module .
As a result you will get the set of centrality bins containing the 
events selected by your centrality module.
What % of events for each centrality bin has actually another centrality 
value?

 With best regards,
                        Vladimir