From: Borge Svane Nielsen (borge@alf.nbi.dk)
Date: Fri Jun 27 2003 - 12:38:43 EDT
Dear collaborators,
Here are some comments. I think it is a good paper already - just needs
some shining up.
In general, one should use ratios to show trends and cancel systematics. I
think the use is justified in this paper for both reasons. However, I get
dizzy with figure 3: ratio of Rcp's, where Rcp is a ratio of Raa's and Raa
is ratio of AA to NN. I am not sure I have understood how the Nbin's
cancel, but if they do, fig 3 must simply show the ratio of differential
cross section at eta=2.2 to that of eta=0. If so, I think it will be
clearer to put that label directly on fig 3.
If I am confused, I think many other readers will be, too. In that
case, clearer explanation is needed in the text.
Fig 1+2. right panel should show eta=2.2 (not 2)
Fig 1 left panel does not show UA1 p+pbar, it should. In the caption, we
should add something like: "and the spectrum for d+Au collisions without
centrality cuts" in second to last sentance.
Fig 1 caption: sqrt(snn) --> sqrt(sNN)
Page 2, Figure 1 shows ...
90 degrees (right panel) --> 90 degrees (left panel)
12 degrees (left panel) --> 12 degrees (right panel)
UA1 exp at CERN-SPS --> UA1 exp at CERN (or SppbarS)
(not to confuse with SPS fixed target)
This paragraph should also refer to the d+Au data on the plot
I also think that one easily gets confused about p+p versus p+pbar in
the model calculations. When is what used?
Page 3. Figure 2 (upper ...
from about 0.2 ... 0.9. -->
from about 0.2 for pt \approx 0.5 GeV/c to a value of 0.9 for pt
\approx 2 GeV/c.
R(AuAu) in this momentum interval --> in the low pt end.
This is called the Cronin effect --> The rise above 1 is called ...
central collisions at, while --> drop "at"
the R(AuAu) y=2.2 is large --> R(AuAu) at eta=2.2 is large
We estimate ... --> We estimate it to be 20%. In addition, we estimate
a systematic error originating from Nbin to be about 10% ...
independent of the used reference ... --> independent of the p+p
reference ...
Figure caption 3: refer to figure 2 (not 3)
In figure 3 we present -->
As a measure of the rapidity dependence of the suppression we present
in figure 3 ...
to the considered --> drop "considered"
Page 4.
rapidities than at midrapidity --> rapidities compared to mid rapidity
In figure 4 ... -->
In figure 1 we have shown the pt spectrum obtained in d+Au collisions
and in figure 4 we present the corresponding R(dAu) ...
enhancement, as has been found --> enhancement similar to what has ...
Summary.
two rapidities. --> two rapidities compared to expectations from p+p
(or nucleon-nucleon as in abstract?) scaled by the number of binary
collisions.
Cheers,
Borge
+------------------------------------------------------------------------+
| Børge Svane Nielsen E-mail: borge@nbi.dk |
| Technical Coordinator http://www.nbi.dk/~borge |
| Niels Bohr Institute Phone: (+45) 3532 5433 |
| University of Copenhagen Fax: (+45) 3532 5465 |
| Blegdamsvej 17, DK-2100 Copenhagen O, Denmark |
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