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<div dir="ltr">I would be careful with giving hand-waving arguments in front of that PAC, considering the comments from the last PAC session about the need for
<b>quantifying</b> the impact of experiments and beam time.</div>
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<div dir="ltr">Also:</div>
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<div dir="ltr">It’s not just xB coverage that might be a problem. The t-coverage is also tricky, and to do it right, you would have to work with t/Q2 small.</div>
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<div dir="ltr">One other thing to keep in mind, when :</div>
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<div dir="ltr">- you cut off the series giving the subtraction constant to its first term and </div>
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<div dir="ltr">- the first term is parameterized by a multi-pole (dipole or tripole) in t,</div>
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<div dir="ltr">then, the shape of the pressure profile is essentially determined by modelling assumptions. The d1(0) factor is then only a simple normalization... The fitting range in t is also something that induces some systematic effects.</div>
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<div dir="ltr">Bottomline: Markus knows all this, just be careful with this line of justification !</div>
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<div dir="ltr">Good luck,<br>
<div>Franck</div>
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<blockquote type="cite">Le 24 sept. 2020 à 17:56, Francois-Xavier Girod <fxgirod@jlab.org> a écrit :<br>
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<div dir="ltr">Concerning Kresimir's article raised by Franck<br>
<div>This is indeed one of the best arguments we have to argue for more data, as I already said during the meeting several times</div>
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<div>Kresimir's criticism is that we use ad-hoc functional forms to perform global fits, and that these include poorly constrained extrapolations</div>
<div>Kresimir's approach, performing neural network fits, provide on of the safest most conservative estimation of the D term uncertainties</div>
<div>Our strategy is diametrically opposite to his</div>
<div>To justify our strategy we need the fullest possible coverage in xB (the variable that requires extrapolation)</div>
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<div>Also note that combining RGA and RGK data we will be able to cleanly separate the linear interference term from the DVCS^2 contribution</div>
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<div>Best regards</div>
<div>FX</div>
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<div dir="ltr" class="gmail_attr">On Thu, Sep 24, 2020 at 3:54 PM SABATIE Franck <<a href="mailto:Franck.Sabatie@cea.fr">Franck.Sabatie@cea.fr</a>> wrote:<br>
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<div style="direction:ltr;font-family:Tahoma;color:rgb(0,0,0);font-size:10pt">Dear Latifa,
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<div>It looks good, once you incorporate the official DVCS plots in the presentation.</div>
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<div>Note that there is a significant risk Markus Diehl will comment about the article from K. Kumericki (Nature volume 570, pages E1–E2 (2019)) in response to your own Nature article: a convincing answer needs to be ready since you put it as an highlight.</div>
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<div>Kind regards,</div>
<div>Franck<br>
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<div id="gmail-m_-7227212376491517298divRpF807608" style="direction:ltr"><font face="Tahoma" size="2" color="#000000"><b>De :</b> Clas12_first_exp [<a href="mailto:clas12_first_exp-bounces@jlab.org" target="_blank">clas12_first_exp-bounces@jlab.org</a>] de
la part de Latifa Elouadrhiri [<a href="mailto:latifa@jlab.org" target="_blank">latifa@jlab.org</a>]<br>
<b>Envoyé :</b> jeudi 24 septembre 2020 14:40<br>
<b>À :</b> <a href="mailto:clas12_first_exp@jlab.org" target="_blank">clas12_first_exp@jlab.org</a><br>
<b>Objet :</b> [Clas12_first_exp] PAC48 slides<br>
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Dear All,</div>
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I have posted the PAC48 RGA talk at clas12 doc-db. I have implemented all the comments I received from the dry run. </div>
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I am waiting for the final DVCS slide from Maxime/FX</div>
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I am also waiting to see if there better graphs/results from MesonX.</div>
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Victor please check the summary see if I captured your comment correctly.</div>
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Please let me know if you have any last comment/suggestion.</div>
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Best regards,</div>
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Latifa</div>
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