[Brahms-l] Stopping: Y/ybeam

From: Murray, Michael J <mjmurray@ku.edu>
Date: Wed Dec 03 2003 - 11:29:41 EST
   Dear Peter,
          if <dy>=0.64ybeam up to SPS energies then one would expect that  the
distributions of dN/dy/ybeam would look identical for bevelac, AGS and SPS. Although the NA49 data shows a dip given the systematic errors their scaled dN/dy distribution is 
probably consistent with that from the AGS. 


 One could compare different energies by look at Feynman X. Since you have the complete
set of spectra if might be possible to construct this from your current results. 

It would seem appropriate to also quote the
NA44 results, Phys. Rev. C 66, 044907 (2002). These are limited in rapidity but have very good PID. By the way are ther no measurements of <dY> at the Bevelac or GSI?

For all the figures optimize the bounding box in the eps files to leave no white space.

The last figure is crowded and somewhat difficult to read. Also when you see the insert
you might think that we have no hope of making a good measurement of the energy loss because we miss most of the baryons. The trick of course is that the ones we miss have lost very little energy. So I would suggest adding an Energy loss axis to the top of the scale. This would be zero at ybeam and 100GeV at y=0. To make more space one could only show the  postive rapidity half (where we have acutal data). 

Eqn 1 looks wrong. It should be normalized by 198
Eqn 2 looks wrong. Surely Nlambda should be Nlambda - Nantilambda


Anyway overall it looks very nice.
 Michael

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Received on Wed Dec 3 11:30:41 2003

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