Dear Zhangbao, On a multi-decade plots this certainly looks good, But without some details from your analysi it is very difficult to judge if this is good enpough for a RAu ratio. As you know Ramiro has also analysied these data are there seem to be significant differences, maybe a factor 2, at higher pt, while at lower they are much closer ? Since you will be presenting this at QM the collaboration needs to see some details/documentation on top of the ppt that I saw at the coll meeting maybe you have a web page that can help us all. Some questions - what set of runs have you been using ? ( pp..) (give list of run no's) - what vertex do you use when picking an acceptance map. Is it done with standard 5 cm bins. how good is the matching vs data. - what vertex range (inel, and/or track vertex do you pick). - the ratio between pions and h- jumps by a large amount at pt~1. Is this beacuse of different run or due to change in PID. It does not look physical but experimental. - what effecinecies are you using (tracking, PID...) - your statistcis seems off hand much better than Ramiro's selected runs- we should compare this. - what 'version of dst are in use.This is important due to the different inel calibrations in use. cheers Flemming ---------------------------------------------------------------- Flemming Videbaek Physics Department Brookhaven National Laboratory e-mail: videbaek@bnl.gov phone: 631-344-4106 ----- Original Message ----- From: <yin.zhongbao@fi.uib.no> To: <brahms-dev-l@lists.bnl.gov> Sent: Thursday, December 11, 2003 9:19 AM Subject: [Brahms-dev-l] spectra from pp collsion at eta = 2.2 > Dear Collaborators. > > Here attached are spectra for h^- and pi^- at eta = 2.2 for pp > collions at 200 GeV. Could you have a look to see if it is reasonable? > I would like to use them as a reference spectrum to calculate R_AA and > R_dA if no objection. > > By the way, could someone tell me the average number of bininary collsions > for dAu at centrality bins 0-30%, 30-60% and 60-92%? > > Thank you very much for your kind help! > > Best regards, > Zhongbao > -- > ----------------------------------------------------- > Zhongbao YIN Phone: +47-55-582792 (O) > Address: +47-55-276803 (H) > Fantoftveien 14G 466 E-mail: > 5075 Bergen Yin.Zhongbao@fi.uib.no > ------------------------------------------------------ > ---------------------------------------------------------------------------- ---- > _______________________________________________ > Brahms-dev-l mailing list > Brahms-dev-l@lists.bnl.gov > http://lists.bnl.gov/mailman/listinfo/brahms-dev-l > _______________________________________________ Brahms-dev-l mailing list Brahms-dev-l@lists.bnl.gov http://lists.bnl.gov/mailman/listinfo/brahms-dev-lReceived on Thu Dec 11 11:51:45 2003
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