Dear Jens Jorgen, I let your comments on Bjorken percolate over the weekend. It is true that quite a bit of physics does not seem to change in the first unit of rapidity. Eun-Joo's poster showed the remarkable simularity of our spectra at y=0 and y=1 and it is also true that in this range out multiplicities don't drop much. This is the space for Bjorken. However to say that at RHIC the rapidity range is not great enough to show Bjorken reminds me of the supersymetry guys who also say that they need more energy. Certainly at the moment one can only say that the first unit or so or rapidity is consistent with Bjorken scaling. The Landau/Corruthers picture is very simple but that is not a disadvantage. The model was originally worked out for pp. I think the fact that we don't have full stopping is not a big problem. I would say the glass is 75% full rather than 25% empty. We don't have much sensitivity to the equation of state. However I suspect that if the theorists could work it out for kaons and antiprotons then we would have more information. It may help the HBT puzzell. This currently suffers from a cronic time crunch, part of which comes from assuming Bjorken flow. This is the fastest possible expansion. We are showing that things are slower, so perhaps our data are part of the solution. Yours Michael _______________________________________________ Brahms-l mailing list Brahms-l@lists.bnl.gov http://lists.bnl.gov/mailman/listinfo/brahms-lReceived on Mon Feb 23 13:28:06 2004
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