Hiro, It's nice! It's quite cusious that the distribution is asymmetric but quite smooth, which might suggest that asymmetries in the distributions from the BB and the Si/Tile are coming from the same source. One thing we can easily think of for the distortion is some errors in the vertex determination. But we know that multiplicity distributions from the BB Counters are not so sensitive to the vertex positions. So the asymmetry in the distribution is probably not due to miscalculated vertex positions. Then, is it possible that the background (not from collisions) is asymmetric? I think it might be useful to look at multiplicity/ADC distributions in the detectors (Si,Tile,BB) from data sets taken with uncogged beam to understand how much and how asymmetrically the detectors see background as Dana and Flemming looked at background hits in the FS. Regards, JH ----- Original Message ----- From: "Hironori Ito" <hito@students.phsx.ukans.edu> To: <brahms-l@bnl.gov> Sent: Tuesday, October 02, 2001 3:48 PM Subject: dndeta figures for impacients > Hello. I made (revised) the dndeta for this year run. It is > located in "http://pii3.brahms.bnl.gov/~hito/dndeta/2001/dndeta_200.gif" > It is meant to be used for starting discussion of mult paper and not to be > used for showing in the conference. Although I am not sure who is the > paper commitee for this year, if you were in the last year, you can > certainly start thinking about the new paper. About the figure, > although it is not final figure, from my estimate, it is very close to > final. It is not like the one I made earlier for presentation which did > not have right normaization as I stated at that point. (Steve and I > still have a bit more of checks and changes to do. like it is not quite > symmetic.) Anyway, the paper commitee should start thinking about it if > we are going for PRL. > > hiro > > (Note: Cuts on the figures are 0-5, 5-10, 10-20, 20-30, 30-40 and 40-50%) > > >
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