<div dir="ltr">Dear Daniel,<div><br></div><div>I'm just working on Viktor's last version (sent 12h ago). Since you wanted to start this afternoon and if you don't mind, then I keep doing so and send you either this after noon (let me know if you prefer this option) or before the end of the what I have.</div><div><br></div><div>Cheers, Ralf</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Apr 18, 2016 at 9:11 AM, Annalisa D'Angelo <span dir="ltr"><<a href="mailto:annalisa.dangelo@roma2.infn.it" target="_blank">annalisa.dangelo@roma2.infn.it</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dear Daniel,<br>
thank you for your very active and useful contribution.<br>
I fully agree on your proposal. Please get in contact also with Ralph who I had asked to review the same Sections<br>
last Saturday.<br>
<br>
My intention is indeed to "complete" one chapter per day, starting from 3.3 and send them to the collaboration for general comments and to you for the review.<br>
If the work will proceed as hoped we should be in a better shape by next meeting.<br>
<br>
All the best<br>
Annalisa<br>
<br>
<br>
Il 18/04/16 14:46, Daniel Carman ha scritto:<div class="HOEnZb"><div class="h5"><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Annalisa,<br>
<br>
Victor did some further work on the early sections of the proposal this weekend after I sent around<br>
my comments. He sent his updates to me for comment and I think they are reasonable. Based on<br>
what is now available for the introductory parts of the proposal, I would propose that we freeze the<br>
first part of the proposal (Section 1 through Section 3.2) so that I can begin to polish it. That way I<br>
don’t have to deal with editing all 70 pages over just a couple of days this weekend. Let me know<br>
if you agree and I will begin my work.<br>
<br>
Regards,<br>
Daniel<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On Apr 17, 2016, at 12:58 PM, Annalisa D'Angelo <<a href="mailto:annalisa.dangelo@roma2.infn.it" target="_blank">annalisa.dangelo@roma2.infn.it</a>> wrote:<br>
<br>
Dear Daniel,<br>
Thank you!!<br>
Annalisa<br>
<br>
Il 17/04/16 18:52, Daniel Carman ha scritto:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Annalisa et al.,<br>
<br>
I have just finished reading the available draft of the hybrid baryon proposal that was circulated yesterday. I have extensively<br>
marked up my copy, but I wanted today to share only my “highest" level of comments as we work to shape a "presentable”<br>
version of this proposal to meet the CLAS Collaboration review deadline of next Monday.<br>
<br>
1) The proposal as it stands, while still rough and hastily written in some areas, is not all that bad. In fact, I am certain that we<br>
can converge this week on a draft that will represent us well for the collaboration review.<br>
<br>
2) One area of weakness that needs to be addressed is that there are no references to the extensive existing measurements<br>
published by CLAS for KY electroproduction. These measurements needs to be described in some level of detail and proper<br>
references included. I can provide this part along with references.<br>
<br>
3) The two existing elements of the CLAS12 N* program (E12-09-003 and E12-06-108A) should be described somewhere in<br>
the introduction in a concise fashion with appropriate references.<br>
<br>
4) The proposal draft will need extensive clean-up with respect to grammar, syntax, and style. As I will be responsible for this,<br>
I would like to get the “frozen” proposal draft (and all files) no later than Friday afternoon (Apr. 22) so that I can complete this<br>
work over the weekend. I will finish my work by Apr. 24 and send the draft to the hybrid group for a final chance to look at it<br>
before submission on Apr. 25.<br>
<br>
5) Section 3. I found the "Old Version" much better written and more complete than the paragraphs that follow in the “New<br>
Version". I propose to keep the text highlighted in blue and to delete the text on pp. 12 and 13 starting from "As discussed in<br>
section 2.2, according ...” until "... channels such as $\phi(1020N$, $K^+\Lambda$.".<br>
<br>
6) The first bullet of Section 3.1 makes no sense to me.<br>
<br>
7) Explain the curves on Fig. 7 and Fig. 8.<br>
<br>
8) Section 3.3. At the top of pp. 20 is a bit about "In collaboration with the JPAC ..." that does not seem to fit. Lots of words but the<br>
relevance to the discussion does not seem to fit.<br>
<br>
9) Section 5. The intro paragraph is all about KY and should be moved to Section 6.<br>
<br>
10) The acceptance of CLAS12 for eppi+pi- and eK+ppi- can be misleading if a proper cut on the momentum for low momentum<br>
tracks in the Central Detector is not considered. The minimum momentum tracks accepted by the CTOF is ~300 MeV. Is there a<br>
pmin cut in effect?<br>
<br>
11) Section 5.4. The second paragraph here makes no sense to me.<br>
<br>
12) What is the purpose of Fig. 21? It should be better integrated into the text and redone with I=-3375A torus current.<br>
<br>
13) Replace Fig. 25 and Fig. 26 with I=+/-3375 A for the torus.<br>
<br>
14) Section 6.3. This business about "Lambda Separation %” and "Sigma0 Separation %" should be eliminated. For cross section<br>
observables the hyperons can be separated with a proper line-shape analysis such as has been done in our existing CLAS<br>
publications. So, remove the vertical lines on Figs. 27 and 28 and eliminate this discussion.<br>
<br>
15) Section 6.4. Rate estimates should be shown only for final torus current choice of -3375 A. All of the other conditions listed only<br>
serve to distract.<br>
<br>
16) Section 6. Somewhere in the section a crisp argument has to be made about value added at running at both 6.6 GeV and 8.8 GeV.<br>
What are the different kinematic ranges accessible at each beam energy and why are these different ranges essential for a successful<br>
experiment?<br>
<br>
17) Section 7. Nowhere are the different observables that will be measured succinctly laid out, especially for K+Y. The plan is to measure<br>
the differential cross sections and to separate the structure functions sigU, sigLT, sigTT, and possible sigLT', as well as to measure the<br>
induced and transferred hyperon polarization. This needs to be clearly discussed and why these observables are important. Also it needs<br>
to be mentioned that the interference structure functions and polarization observables might be even more sensitive to hybrid baryons<br>
that measurements of differential cross sections alone. Certainly they can only add additional sensitivity in the search for new baryon<br>
states (hybrid or conventional). These observables and their potential sensitivities are not really mentioned or discussed at all in the<br>
proposal.<br>
<br>
18) Section 7.6. The discussion here is a bit muddy and misleading. Table 5 shows the minimal value of the A1/2 electrocouplings vs. Q2,<br>
but under the condition that only the scattered electron is used to define the trigger. A tepid statement is made that with a two- or<br>
three-prong trigger this minimal value improves. I think that some additional table must be included on what this improvement is with<br>
our expected trigger condition for the experiment.<br>
<br>
19) Section 7.7. Replace Tables 7 and 8 with values for I=-3375 A torus current.<br>
<br>
20) Replace Figs. 34, 35, 36, 37 with I=-3375 A torus current.<br>
<br>
21) Section 7.8 needs some attention to introduce this approach to define our sensitivity to finding hybrids. This includes mentioned the<br>
use of this chi-squared approach from Bonn-Gatchina. The section should also be expanded following Volker' recent suggestion of<br>
scanning the chi-squared space assuming different quantum numbers for the resonance than were used to generate it.<br>
<br>
22) Section 8. The justification of the 30 days at each beam energy needs to be made more complete. We need to carefully define our<br>
statistical requirements based on a certain minimum threshold value for the hybrid electrocoupling. The running time needs to be justified<br>
showing how the minimum electrocoupling value increases as a function of reduced beam time.<br>
<br>
23) Page 59. Figs. 39 and 40 are not referenced in the text.<br>
<br>
24) Section 9. The summary should include explicit mention to the two existing elements of the CLAS12 N* program, E12-09-003 and<br>
E12-06-108A, at 11 GeV.<br>
<br>
25) Are Appendices A and B needed for this proposal? This is fairly elementary stuff. If deemed to be helpful to the proposal, the formalism<br>
section on KY should follow what I have developed as the RPR formalism is based on what I have defined in our published KY papers from<br>
CLAS.<br>
<br>
Let me know if folks have any questions or comments on this.<br>
<br>
Regards,<br>
Daniel<br>
<br>
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</blockquote>
-- <br>
================================================<br>
Prof. Annalisa D'Angelo<br>
Dip. Fisica, Universita' di Roma "Tor Vergata"<br>
INFN Sezione di Roma Tor Vergata, Rome Italy<br>
<a href="mailto:email%3Aannalisa.dangelo@roma2.infn.it" target="_blank">email:annalisa.dangelo@roma2.infn.it</a><br>
Jefferson Laboratory, Newport News, VA USA<br>
Email: <a href="mailto:annalisa@jlab.org" target="_blank">annalisa@jlab.org</a><br>
Tel: <a href="tel:%2B%2039%2006%2072594562" value="+390672594562" target="_blank">+ 39 06 72594562</a><br>
Fax: <a href="tel:%2B%2039%2006%202040309" value="+39062040309" target="_blank">+ 39 06 2040309</a><br>
<br>
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</blockquote>
<br>
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</blockquote>
<br>
-- <br>
================================================<br>
Prof. Annalisa D'Angelo<br>
Dip. Fisica, Universita' di Roma "Tor Vergata"<br>
INFN Sezione di Roma Tor Vergata, Rome Italy<br>
<a href="mailto:email%3Aannalisa.dangelo@roma2.infn.it" target="_blank">email:annalisa.dangelo@roma2.infn.it</a><br>
Jefferson Laboratory, Newport News, VA USA<br>
Email: <a href="mailto:annalisa@jlab.org" target="_blank">annalisa@jlab.org</a><br>
Tel: <a href="tel:%2B%2039%2006%2072594562" value="+390672594562" target="_blank">+ 39 06 72594562</a><br>
Fax: <a href="tel:%2B%2039%2006%202040309" value="+39062040309" target="_blank">+ 39 06 2040309</a><br>
<br>
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</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div>Prof. Ralf W. Gothe</div>
<div>Department of Physics and Astronomy</div>
<div>University of South Carolina</div>
<div>Columbia, SC 29208</div>
<div> </div>
<div>Phone: 803 777 9025</div>
<div>Fax: 803 777 3065</div></div>
</div>