[Brahms-l] Npart and Ncoll calculator - now with errors...

Hi,   I have updated the Npart and Ncoll calculator at
http://kunuc10.phsx.ku.edu/~sanders/cent2npart.html
to include the calculations needed to deduce Glauber model
uncertainties.  At the moment the calculations are done for 62.4 and  
200 GeV AuAu.
The new results are reasonable consistent with the latest draft of  
the 62.4 GeV paper,
although the quoted 0-10% Ncoll uncertainty may be a little low.

I tried to include enough detail on the page to make clear what was  
done.  If not, let
me know and I'll try to clarify.   Each of the RHIC experiments seems  
to be making its own
assumptions as to the Glauber model parameters and their  
uncertainties.  I've taken something of
a composite approach.  Several references are given with the  
calculation results.

Following up on a question JH posed at last Thursday's meeting, the  
calculator also includes a Ncoll(central)/Ncoll(peripheral)  
option.     This allows us to explore the
uncertainties on this ratio.   Unfortunately, the uncertainty on the  
total multiplicity yield is one of the
larger error terms.  This term does not tend to cancel out in taking  
the ratio.

Comments, suggestions and questions are welcomed...

...steve
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