[Clascomment] OPT-IN:EMC Effect and Correlated Nucleons: When One Plus One is not Two

[Larry Weinstein]

Dear Reinhard,

Thank you for your kind words and thoughtful comments.  We will respond 
to your comments more thoroughly later, but here are a couple of quick 
thoughts.

Figure 1 is intended to convey the fact that the nucleons in the nuclei 
are in motion, that the SRC pairs are temporary fluctuations, and that 
the nucleons in those pairs might be modified.   Any suggestions you 
might have to make this more clear would be appreciated.  It's also the 
kind of cartoonish figure that Science seems to like (sigh).

We'll try to make Fig 2 more readable.

The Supplementary Material is definitely a wonderful way to include all 
the complicated details.  You can download it from the ad hoc committee 
review page for this paper.

Figure 3: The standard EMC ratio is (2/A) Sigma_A/sigma_d.  The vertical 
axes on Fig 3 are (left) the slopes of (1/N)sigma_A/sigma_d and (right) 
the slopes of (1/Z) Sigma_A/sigma_d to give the slope of the per-neutron 
and per-proton EMC ratios.  The SRC ratios are defined similarly.  We 
will explain this better in the paper.

Barak Schmookler is an MIT student.  This will form part of his thesis 
(he is also analyzing the tagged EMC and SRC ratios with a fast backward 
proton).

Sincerely,
Larry

Reinhard Schumacher wrote:
> Hello Colleagues,
>
> I have read your draft CLAS paper "EMC effect and correlated nucleons:  when 1 + 1 != 2" and have just a few comments.   This is another very nice paper on the topic of SRC that I think will get a lot of attention.   It is mostly well constructed and written well, but I have a few suggestions that you may consider to making it even better.
>
> Figure 1:   This figure is not very informative in my view.   The message of the cartoonish film strip is not clear.   There must be a better way to illustrate the idea that the np_SRC configuration is not the same as "the sum of the parts".   If the point is that correlated quarks are "slower" than quarks in separate nucleons, maybe dream up a figure that includes arrows representing the speeds of the quarks being smaller in the case when the nucleons overlap.
>
> Figure 2:   This is a very powerful figure:   it supports the results in a very impressive way.  However, the text in the legend is nearly impossible to read.   Consider getting rid of the big fat arrow between panels and increasing the size of the text underneath it.    Alternatively, stack the two panels so each half can be made bigger.
>
> Line 181:  How nice it is to bury all the complications in "Supplemental material", your Ref 18.   The reference is not complete as given is it?  Where will this material be archived?  Can CLAS people see it now, and if not, why not?
>
> Figure 3:  I seem to have missed where the vertical axis is defined.   What is being plotted here?   That is, what is dR^n_EMC/dx?  Please explain this better.
>
> Ref 12:  is missing.
>
> Ref 18: is missing.
>
> Finally, who is lead author Schmookler?  Apparently he is a limited CLAS member. But is he an MIT student, or something else?   If he is a student, does he have a thesis to put on the CLAS thesis page?  (I happen to be the person who likes to keep that web page up to date.)
>
> Best Regards,
> Reinhard
>

-- 
				Sincerely,
				Larry

-----------------------------------------------------------
Lawrence Weinstein
Eminent Scholar and University Professor
Physics Department
Old Dominion University
Norfolk, VA 23529
757 683 5803
757 683 3038 (fax)
weinstein at odu.edu
http://www.lions.odu.edu/~lweinste/