[Brahms-dev-l] Brahms minutes 23 Apr 2010

Minutes of BRAHMS Analysis Meeting 23 Apr 2010
==============================================

Present: Flemming, Chellis, JH, Ramiro, Casper, Kris, Steve and Michael

Agenda and slides at
====================
http://indico.cern.ch/conferenceDisplay.py?confId=90050

d,p spectra: Now vs Thesis 15' Speakers: 	Michael Murray
dp issues 20' Speakers: 	Flemming Videbaek (BNL)
dAu report 20' Speakers: 	R. Debbe (BNL)


Michael started off by comparing Casper's spectra from his thesis to  
that presented in the paper. At the time of the thesis the wrong  
deuteron mass was used in the fitting and so it is not appropriate to  
compare dN/dy and T for the deuterons. Flemming felt very comfortable  
with the protons, given the different centrality range compared to  
our stopping publication.

The data at y=3 have changed considerably because of a correction to  
the RICH analysis. Michael noted that pbar/2 from the thesis seemed  
to be at the same level as pbar/3 from the paper. The same was true  
for d and dbar.

We tend to be significant above PHENIX below pt=1.5GeV.

Flemming and Casper both compared our spectra to PHENIX. Their is a  
strong descrepency below Pt=2GeV. This may be related to  
contamination from particle ID. Flemming commented that because of  
the sharp fall in our acceptance and the large GEANT corrections we  
should not use the data below pt=1GeV for deuterons or 0.5GeV for  
protons. This would not affect our physics meassage very much.

Todo: Estimate the PID contamination of the data below 2GeV in Pt.


dAu: Ramiro
===========
Ramiro has prepared Rcp and RdAu vs Pt and rapidity for pi+-, K+-,  
p,pbar. So far he does not see much of an isospin effect. He may have  
to limit his Pt reach because of PID contamination. He is trying to  
keep as close as possible to Kris method for creating pp spectra but  
there are some differences still. He would like to make two  
centrality bins.



Other News: Steve is back to looking at real data in the flow  
analysis. He will invite Selemon to Kansas over the summer.

Submitted by Michael Murray 
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