From: Claus O. E. Jorgensen (ekman@nbi.dk)
Date: Thu Jun 26 2003 - 19:18:46 EDT
Hi JJ, > However, we fell that we can arrive at the central arguments by > discussing the ratios of spectra for central and peripheral collisions, > and the ratios of such ratios at the two rapidities, thus making us > independent of the p+p ref. spectra and even of N_bin. I have to correct you here. A lot of the systematic errors cancel out when you make the central to "semi-peripheral" (Rcp) ratios, but not the errors introduced in the Nbin calculation! Actually this is to 1st approximation the only systematic error in this ratio. Errors introduced by correcting for acceptance will cancel out, errors in efficiencies will cancel out (the dependence on centrality is very little, especially for high field runs) and of course the reference normalization will cancel out. By the way, the anlysis is pretty stable now. There's one single problem that we are fighting at the moment. The yields calculated from FFS are slightly higher than what's calculated for the full FS (the different FFS (or FS) settings agree nicely). With the two limits we have now the conclussion will not change dramatically. More info on the analysis will follow... Cheers, Claus
This archive was generated by hypermail 2.1.5 : Thu Jun 26 2003 - 19:24:25 EDT