On Thu, 15 Mar 2001, Jens Jorgen Gaardhoje wrote: > Dear Brahms friends > > Check out the directory > > http://www.nbi.dk/~hehi/presentations/ > > for my talk at Moriond next week. There are 2 files: moriond2001.ps and > moriond2001.ppt. > Comments welcome. Hi Jens Jorgen. The talk looks nice, but I have one comment. I'm a bit sceptical about including the TPM1 dNdEta-numbers, for a few reasons. One is of course that I get somewhat different numbers, and that seem to agree better with Hiro and Steve's Tile/Si analysis. Take a look at www.fys.uio.no/~bjornhs/dNdEtaPlot1.ps for a comparison figure showing my latest numbers. Here I have used the centrality made by Claus and Christian, and the <Npart> presented by Hiro in BAN26 so lots of stuff to critisize there but I still think the main features are correct. The second reason is that the plot you have, as I read it, indicate that we have determined the systematic uncertainty (?) and that we uderpredict HIJING for peripheral events. Is this a safe interpretation of Claus's analysis? Also as far as I know the numbers you have are calculated assuming a constant tracking efficiency in TPM1, something which we have shown is not correct. Don't get me wrong - I'm not implying that my numbers are better or that my analysis is more correct than what Claus has done, but I think we should be careful throwing in plots like this when we are not internally consistent. There is still some more work to be done on this analysis. For reference, here are the TPM1-numbers plotted in the figure above: Npart: {66.15,103,153.5,201,239,289,338} dNdEta/NpartPairs: {2.76, 2.90, 2.96, 3.05, 3.19, 3.16, 3.41} Ping to all :-) ------------------------------------------------ Bjorn H. Samset Master-student in Heavy Ion physics Mob: +47 92 05 19 98 Office: +47 22 85 77 62 Adr: Kri 2A709 Sognsveien 218 0864 Oslo
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