Hi, As JJ has indicated, the 200 mult paper running on a fast track and we hope to have a final version by the time JJ gets back (JJ is the principal author of the current draft). While undergoing the hardship of a meeting in Mali (Hawaii), I did have a chance to chat with Kharzeev concerning his calculations and the overall question of model comparisons. He brought up several points, in particular, that we need to consider for the "next" draft: 1) The Hijing Npart numbers are known to differ from the Glauber values for more peripheral events. The reason for this discrepancy is apparently not well understood, since Hijing uses Glauber to calculate these numbers. In any case, Phobos, Phenex, and Kharzeev now all have the same Npart numbers based on Glauber. The clear suggestion is that we also adopt the newer (correct?) numbers. 2) For central collisions, Npart is modified (increased) due to quantum fluctuation. This increase is NOT accounted for in the present calculations and, therefore, when the theory curve shows a "flat" dependence of 2*(dN/deta)/Npart vs. Npart for central events, the data are expected to rise as Npart increases because of the fluctuations. (Motto, theorists are crafty...). This suggests to me that an attempt to fit a functional form like A*Npart + B*Ncol may not be very useful. 3) Both Kharzeev and Wang have suggested that what IS useful is the ratio of the 200/130 (dN/deta)/Npart results. Here we can expect scaling errors of the experiment and some inadequacies of the theory (such as fluctuation) to partially cancel. Hiro is working on this figure now and we expect a new draft with the revised figures by mid-week. While moving the discussion of the draft from the paper committee to the "committee of the whole" is undoubtly burdensome, the hope is that getting feedback early will speed up the final submission. These results are clearly of great interest to the community. (...and, we are not the only group that has done this measurement...) Regards, Steve
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