sPHENIX bulk physics topical group

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

07.08.2022 19:11, Ron Belmont пишет:
> You can reply to the list (encouraged) or to me privately, whichever 
> you prefer

                     Dear All,

I completely agree that the most interesting thing  to study  are 
v2{2,4,6,8,10} from cumulants.

May be it would be interesting to see also following:
1) we divide each event to subevents in eta  (delta_eta ~= 0.5-0.7). 
All  tracks of any subevent belong to the some eta-interval which
is its own for each subevent.
 Then using Q-cumulants method we can obtain v2{2,4,6,...} for each 
subevent and the whole event.
 And we can compare them.
2)We can to obtain v2{2,4,6,...} from integral cumulants getting from 
(subevent_i + subevent_j).
 It is interesting to compare them for different subevent combinations 
(i,j).
3) It would be interesting to get v2{2,4,6,...} from differential 
cumulants obtaining
from (subevent_i + subevent_j), where subevent_i is used  as Reference 
Flow Particles ( for getting the reference cumulants)
 and subevent_j is used as Particles of Interest.
 And it is interesting to see the same for (subevent_j + subevent_i). 
Will  the differential cumulants be the same as in the
case of (subevent_i + subevent_j) or different?
4)If we have v2{8} or may be v2{10} then may be we can get nonflow 
correlations from
cumulants c_n{2,4,6,... }. I think it is also interesting.
5) May be it would be interesting to get v1 and v3 too.

a) I have not any experience in the cumulant studying. As I understand 
we need tracks or tracklets from TPC or Silicon Vertex detector.
b) May be, that simple MonteCarlo (without G4) can help to see how the 
number of tracks in event, track resolution, inhomogeneities of the 
detector in azimuth will influence the cumulants.
c) I agree. For Day-1 all can be done for minimum bias.
d)I do not know what is currently available for MC
e) I do not know it. I believe to Ron.

  With best regards,
               Vladimir