[Clas_hadron] [EXTERNAL] Slides for EUNPC

[Bryan McKinnon]

Igor

The reference 3 is for the bullet point, not the plot.
The bullet point states differential cross-section for which the reference is relevant.

Bryan

___________________________________

Dr. Bryan McKinnon

Nuclear and Hadron Physics Research
School of Physics and Astronomy
University of Glasgow
Glasgow
G12 8QQ
Scotland UK

Tel: (+44/0) 141-330-7226<tel:141-330-7226>
___________________________________


On 25 Oct 2022, at 18:01, Igor Strakovsky via Clas_hadron <clas_hadron at jlab.org> wrote:


Valery,

Please do not make a mixture between apples and oranges

GlueX measures total cross sections for dozens of energies and dipole ff parametrization is unnecessary !!!
For several energies, GlueX reported diff cross sections and in this case, Lubomir used a dipole.  So, this
ref on Richard's slide is wrong

If you cannot trust me then go to Lubomir !!

Cheers, Igor



On Tue, Oct 25, 2022 at 12:48 PM Valery Kubarovsky <vpk at jlab.org<mailto:vpk at jlab.org>> wrote:
Igor,
Take a look at page 10.
ValeryI
________________________________
From: Igor Strakovsky <igor at gwu.edu<mailto:igor at gwu.edu>>
Sent: Tuesday, October 25, 2022 11:56
To: Valery Kubarovsky <vpk at jlab.org<mailto:vpk at jlab.org>>
Cc: Richard Tyson (PGR) <r.tyson.1 at research.gla.ac.uk<mailto:r.tyson.1 at research.gla.ac.uk>>; CLAS Hadron <clas_hadron at jlab.org<mailto:clas_hadron at jlab.org>>
Subject: Re: [Clas_hadron] [EXTERNAL] Slides for EUNPC

Valery,

That is wrong and you can check it with Lubomir, if you wish

Lubomir used this parametrization for SLAC data to get total cross section from limited t range of ds/dt, GlueX measured total cross sections wich shown on published figure

So, StrikFord's parametrization does not make any deal with the GlueX data

Cheers, Igor



On Tue, Oct 25, 2022 at 11:50 AM Valery Kubarovsky <vpk at jlab.org<mailto:vpk at jlab.org>> wrote:
Igor,
In the recent presentations Gluex uses the form factor parametrization
<image.png>

suggested in the paper of L. Frankfurt and M. Strickman, Eq. 3.
Valery

________________________________
From: Clas_hadron <clas_hadron-bounces at jlab.org<mailto:clas_hadron-bounces at jlab.org>> on behalf of Igor Strakovsky via Clas_hadron <clas_hadron at jlab.org<mailto:clas_hadron at jlab.org>>
Sent: Friday, October 21, 2022 16:58
To: Richard Tyson (PGR) <r.tyson.1 at research.gla.ac.uk<mailto:r.tyson.1 at research.gla.ac.uk>>
Cc: CLAS Hadron <clas_hadron at jlab.org<mailto:clas_hadron at jlab.org>>
Subject: Re: [Clas_hadron] [EXTERNAL] Slides for EUNPC

Hi Richard,

I have 2 comments for your slides for your consideration...

1) For pg 2: I do not think that this ref [ [3] L. Frankfurt, M. Strikman, Phys. Rev. D. 66, 031502 (2002).] makes any sense for GlueX data

2) Using GlueX threshold data, we determine J/psi-p scattering length (attached papers)

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<mailto:igor at gwu.edu>, igor at jlab.org<mailto:igor at jlab.org>


On Fri, Oct 21, 2022 at 8:06 AM Richard Tyson (PGR) via Clas_hadron <clas_hadron at jlab.org<mailto:clas_hadron at jlab.org>> wrote:
Hi All,

I'm going to give a talk at the EUNPC<https://urldefense.proofpoint.com/v2/url?u=https-3A__indico.cern.ch_event_1104299_&d=DwMFCQ&c=CJqEzB1piLOyyvZjb8YUQw&r=33hEheRcHuqzMP4K5hhMDPge6hQHiwXozGe7lR_eSfg&m=Xz6NFSC0nPCXJgDlknojl9AFKEY3vRTvtTRXRfBBasDZebXkxPWDIAkDuBZZd2r6&s=JVwTWKMQ4syAYDMkIbyYjjzuUSN3lcrEy59P-hfdkow&e=> Conference next week on J/ψ Near-Threshold Photoproduction off the Proton and Neutron with CLAS12 and wanted to check that this if fine with you all, sorry for the short notice. I've attached my slides; any feedback is welcome!

Thanks,
Richard

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