[G14_run] [EXTERNAL] Re: g14 meeting report on G extraction for pi- p photoproduction on the neutron

Mon Jul 3 06:26:53 EDT 2023

Dear Annalisa,

Thank you and all the colleagues thinking it over and giving the valuable
feedback. I believe all the suggestions are much helpful to make the work
more logically complete. I will work accordingly after I get back home on
the coming Friday and hopefully complete it during weekends.

Thanks and regards,
Haiyun

On Mon, Jul 3, 2023, 04:39 Annalisa D'Angelo <annalisa.dangelo at roma2.infn.it>
wrote:

> Dear Haiyun,
>
> thank you for your hard work. The final version of the analysis note is
> very good shape and shows the accuracy of your analysis.
>
> While a detailed study of systematic errors related to the event yields
> and to beam and target polarizations has been performed, the accuracy of
> the extraction of the G asymmetry values still needs some assessment, as
> shown from the variation of results obtained for the bins that you have
> re-fitted.
>
> G is the main outcome of this work and we should be 100% sure of the final
> results.
>
> The main problem lays in the fact that many plots of figures from 38 to 42
> show an overall offset and an additional underlying cos 2phi structure.
> This points to the fact that the de-coupling of Sigma and G obtained from
> equations 3 and 4 is not 100% effective.
>
> The new figures 43, 44 and 45, show that the p0 parameter, which we
> understand corresponds to the extracted G value, changes in sign and
> strength (up to a factor 10 from 0.01 to 0.1), but fortunately the
> variation is compatible with the high statistical error associated to the
> p0 parameter error.
>
> This topic has been discussed among Mike, Tsuneo and myself during lat g14
> meeting. As a result we would suggest to:
>
> - perform a systematic study of the variation of the p0 parameter fitting
> ALL the distributions of figures from 38 to 42 using both i) the G sin 2phi
> function ii) the G sin2phi + a cos 2phi +c
>
> function as you did for the figures 43, 44 and 45;
>
> - use the results obtained for G for the two procedures to assess the
> systematic error due to the residual coupling of Sigma and G contributions,
> and add them to the systematic error table for G.
>
>
> There are some other minor observation I would like to mention  in the
> following:
>
> - you name the appendixes just A, B, C. I would suggest naming a quoting
> them as Appendix A, Appendix B etc.
>
> - you have interchanged the symbol for the double polarization asymmetry
> between g, G and |G (Capital G with an additional internal vertical line in
> the symbol).
>
> In particular g is used when the observable is extracted from the fit,
> while G is often used as a simplified version of G and "|G". I would
> suggest using G everywhere, including in the title.
>
> - figure 28 at page 26 is still missing figure labels
>
> - figure 29 a at page 27 has wrong figure label.
>
> - coefficients a,c in the captions of figures 43,44 and 45 are fit
> parameters, not constants.
>
> - the captions of figures 43, 44 and 45 show more theta angles than those
> appearing in the plots. We would suggest to replace those figures, and the
> ones from 38 to 42, with the ones comparing the two fits mentioned above,
> including all energies and angles;
>
> - at page 29 the sentence:
>
> "The fitting quality is qualitatively denoted by "Prob" in the figures"
>
> Should be substituted by something like:
>
>  "The fitting quality is expressed by the probability ("Prob") of
> obtaining a higher value for the reduced Chi-2 variable, as shown in the
> figures upper boxes"
>
> Should you agree on performing the fits, the text and the result should be
> updated accordingly.
>
>
> Thank you for your patience and attention
>
> All the best
>
> Annalisa
>
>
>
> Il 20/06/23 05:10, Haiyun Lu ha scritto:
>
> I finished studying the fit behavior of some G fits. Basically, additional
> cos(2phi) and constant terms are added to represent leaked Sigma. The
> appendix B, fitting Sigma and G, is updated with additional fits. A
> paragraph is added in conclusion to explain this, and final values are
> updated accordingly.
> It should be complete now.
>
> On Sun, Jun 4, 2023 at 8:45 PM Haiyun Lu <haiyun.lu at gmail.com> wrote:
>
>> I finished integrating all the comments into the note at overleaf. It is
>> ready for a final-round review before submitting to CLAS review.
>> There are some touches needed for figures and I will update them while it
>> is reviewed.
>>
>> Thanks,
>> Haiyun
>>
>> On Fri, Apr 21, 2023 at 9:33 AM Igor Strakovsky <igor at gwu.edu> wrote:
>>
>>> Hi Andy,
>>>
>>> Actually, MAID web does not report what data they are using. Anyway, I
>>> am sending Victor
>>> all the data which SAID has (including updates). So, please be sure that
>>> MAID results is up
>>> to date
>>>
>>> Cheers, Igor
>>>
>>> -----
>>> Igor Strakovsky, SAID INS The George Washington University
>>> VSTC: 571-553-8344, Cell: 703-728-5627, Skype: igors1945_2
>>> Emails: igor at gwu.edu, igor at jlab.org
>>>
>>>
>>> On Thu, Apr 20, 2023 at 1:09 PM Andy Sandorfi <sandorfi at jlab.org> wrote:
>>>
>>>> Hi Igor,
>>>>
>>>> Can you check if Victor is able to make a statement such as, “the MAID
>>>> PWA includes all available data up to year XXXX” ?
>>>>
>>>>
>>>>
>>>> Andy
>>>>
>>>>
>>>>
>>>> *From: *Igor Strakovsky <igor at gwu.edu>
>>>> *Date: *Thursday, April 20, 2023 at 12:56 PM
>>>> *To: *Andy Sandorfi <sandorfi at jlab.org>
>>>> *Cc: *Annalisa D'Angelo <annalisa.dangelo at roma2.infn.it>, g14 run <
>>>> g14_run at jlab.org>, haiyun.lu at gmail.com <haiyun.lu at gmail.com>, Tsuneo
>>>> Kageya <kageya at jlab.org>
>>>> *Subject: *[EXTERNAL] Re: [G14_run] MAID
>>>>
>>>> Hi Andy,
>>>>
>>>>
>>>>
>>>> The situation with MAID is not really simple.  There is one retired
>>>> person, Victor, whois still active.  Ostrick and Denig told me that they do
>>>> not have interest/resources in supporting MAID.  But Victor gave MAID
>>>> predictions upon my request.  My hope is that he will be a co-author of the
>>>> coming g14 paper
>>>>
>>>>
>>>>
>>>> Cheers, Igor
>>>>
>>>>
>>>> -----
>>>>
>>>> Igor Strakovsky, SAID INS The George Washington University
>>>>
>>>> VSTC: 571-553-8344, Cell: 703-728-5627, Skype: igors1945_2
>>>>
>>>> Emails: igor at gwu.edu, igor at jlab.org
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> On Thu, Apr 20, 2023 at 12:10 PM Andy Sandorfi via G14_run <
>>>> g14_run at jlab.org> wrote:
>>>>
>>>> Hi Annalisa,
>>>>
>>>> Please verify with Igor, but I believe that MAID has not been updated
>>>> in years. It’s OK to show the MAID predictions with the g14 data in a
>>>> paper, but one should include a statement about when that PWA was last
>>>> updated.
>>>>
>>>>
>>>>
>>>> Andy
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> *From: *G14_run <g14_run-bounces at jlab.org> on behalf of Annalisa
>>>> D'Angelo via G14_run <g14_run at jlab.org>
>>>> *Date: *Thursday, April 20, 2023 at 8:57 AM
>>>> *To: *g14 run <g14_run at jlab.org>, haiyun.lu at gmail.com <
>>>> haiyun.lu at gmail.com>, Tsuneo Kageya <kageya at jlab.org>
>>>> *Subject: *[G14_run] Fwd: [EXTERNAL] MAID
>>>>
>>>> Dear All,
>>>>
>>>> I am forwarding to you the prediction from MAID, kindly provided buy
>>>> Igor,  for the Sigma and G observables in pi-p photoproduction.
>>>>
>>>> All the best
>>>>
>>>> Annalisa
>>>>
>>>>
>>>>
>>>> -------- Messaggio Inoltrato --------
>>>>
>>>> *Oggetto: *
>>>>
>>>> Re: [EXTERNAL] MAID
>>>>
>>>> *Data: *
>>>>
>>>> Fri, 14 Apr 2023 09:09:02 -0400
>>>>
>>>> *Mittente: *
>>>>
>>>> Igor Strakovsky <igor at gwu.edu> <igor at gwu.edu>
>>>>
>>>> *Rispondi-a: *
>>>>
>>>> igor at gwu.edu
>>>>
>>>> *A: *
>>>>
>>>> Annalisa D'Angelo <annalisa at jlab.org> <annalisa at jlab.org>, Franz Klein
>>>> <fklein at jlab.org> <fklein at jlab.org>, Annalisa D'Angelo
>>>> <annalisa.dangelo at roma2.infn.it> <annalisa.dangelo at roma2.infn.it>
>>>>
>>>>
>>>>
>>>> Dear Annalisa,
>>>>
>>>>
>>>>
>>>> Thanks
>>>>
>>>>
>>>>
>>>> You too, Have a nice weekend,
>>>>
>>>> Igor
>>>>
>>>>
>>>>
>>>> ps: Please find attached MAID predictions for Sigma and G for gn-->pi-p
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> -----
>>>>
>>>> Igor Strakovsky, SAID INS The George Washington University
>>>>
>>>> VSTC: 571-553-8344, Cell: 703-728-5627, Skype: igors1945_2
>>>>
>>>> Emails: igor at gwu.edu, igor at jlab.org
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> On Fri, Apr 14, 2023 at 9:04 AM Annalisa D'Angelo <annalisa at jlab.org>
>>>> wrote:
>>>>
>>>> Dear Igor,
>>>>
>>>> thank you! See you on Monday. Have a nice week-end.
>>>>
>>>> Annalisa
>>>>
>>>> Il 14/04/23 15:01, Igor Strakovsky ha scritto:
>>>>
>>>> Dear Annalisa,
>>>>
>>>>
>>>>
>>>> Monday, 10am works for me
>>>>
>>>>
>>>>
>>>> We can use Zoom: https://urldefense.proofpoint.com/v2/url?u=https-3A__jlab-2Dorg.zoomgov.com_j_1619984443&d=DwIFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=5LSWsFN5KweowPCsdwCuT6TNyYmHKJ3RcKK8qa-oO-g&m=rOet7i4VtN8O531WXiqMCGzsBO8aB-ne4d7i6UcVhnSDtMlnhYB1-0R5_bEObfiJ&s=8cmD02Qc3WpZ9KjZUb7yLt_r9PFOHmN1cXaisikGP3w&e= 
>>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__jlab-2Dorg.zoomgov.com_j_1615438135-3Fpwd-3Dbm8xdmY0dytXeUtWV1ZEN2NVdVppdz09&d=DwMFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=QDJbiECzfxNvPOYgSWghomOgImTBYIv1HgeGmNQ96o8&m=yAkhnpgy_6dw2nLM9lufdlr3UgnIGNdNV_T94FyAVb-lZakk5NgNMx5ooxvwMiAp&s=GCGcJed3poThbLq2pM9SXPInBAiRh2yKP3-U0AIY2e4&e=>
>>>>
>>>>
>>>>
>>>> Or any alternative
>>>>
>>>>
>>>>
>>>> Cheers, Igor
>>>>
>>>>
>>>> -----
>>>>
>>>> Igor Strakovsky, SAID INS The George Washington University
>>>>
>>>> VSTC: 571-553-8344, Cell: 703-728-5627, Skype: igors1945_2
>>>>
>>>> Emails: igor at gwu.edu, igor at jlab.org
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> On Fri, Apr 14, 2023 at 8:52 AM Annalisa D'Angelo <annalisa at jlab.org>
>>>> wrote:
>>>>
>>>> Dear Igor,
>>>>
>>>> what about Monday april 17 at 10:00 am Jlab time?
>>>>
>>>> Annalisa
>>>>
>>>> Il 13/04/23 16:36, Igor Strakovsky ha scritto:
>>>>
>>>> Hi Annalisa,
>>>>
>>>>
>>>>
>>>> Can we talk about ReggeMAID someday by Zoom or Skype?
>>>>
>>>>
>>>>
>>>> Thanks, Igor
>>>>
>>>>
>>>>
>>>>
>>>> -----
>>>>
>>>> Igor Strakovsky, SAID INS The George Washington University
>>>>
>>>> VSTC: 571-553-8344, Cell: 703-728-5627, Skype: igors1945_2
>>>>
>>>> Emails: igor at gwu.edu, igor at jlab.org
>>>>
>>>> --
>>>>
>>>> ================================================
>>>>
>>>> Prof. Annalisa D'Angelo
>>>>
>>>> Dip. Fisica, Universita' di Roma "Tor Vergata"
>>>>
>>>> Istituto Nazionale di Fisica Nucleare
>>>>
>>>> Sezione di Roma Tor Vergata, Rome Italy
>>>>
>>>> email:annalisa.dangelo at roma2.infn.it
>>>>
>>>> Jefferson Laboratory, Newport News, VA USA
>>>>
>>>> Email: annalisa at jlab.org
>>>>
>>>> Tel: + 39 06 72594562
>>>>
>>>> --
>>>>
>>>> ================================================
>>>>
>>>> Prof. Annalisa D'Angelo
>>>>
>>>> Dip. Fisica, Universita' di Roma "Tor Vergata"
>>>>
>>>> Istituto Nazionale di Fisica Nucleare
>>>>
>>>> Sezione di Roma Tor Vergata, Rome Italy
>>>>
>>>> email:annalisa.dangelo at roma2.infn.it
>>>>
>>>> Jefferson Laboratory, Newport News, VA USA
>>>>
>>>> Email: annalisa at jlab.org
>>>>
>>>> Tel: + 39 06 72594562
>>>>
>>>> _______________________________________________
>>>> G14_run mailing list
>>>> G14_run at jlab.org
>>>> https://mailman.jlab.org/mailman/listinfo/g14_run
>>>>
>>>> --
> ================================================
> Prof. Annalisa D'Angelo
> Dip. Fisica, Universita' di Roma "Tor Vergata"
> Istituto Nazionale di Fisica Nucleare
> Sezione di Roma Tor Vergata, Rome Italyemail:annalisa.dangelo at roma2.infn.it
> Jefferson Laboratory, Newport News, VA USA
> Email: annalisa at jlab.org
> Tel: + 39 06 72594562
>
>
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