[Clas12_dileptons] Release Note for Preliminary RG-B Results

[Richard Tyson]

Hi Bryan,

Ok, thanks for the clarification. I've removed that section from the note and will not show the second plot at the meeting tomorrow.

Cheers,
Richard
________________________________
From: Bryan McKinnon <Bryan.McKinnon at glasgow.ac.uk>
Sent: Wednesday, May 22, 2024 3:38 PM
To: Richard Tyson <tyson at jlab.org>
Cc: Rafayel Paremuzyan via Clas12_dileptons <clas12_dileptons at jlab.org>
Subject: [EXTERNAL] Re: [Clas12_dileptons] Release Note for Preliminary RG-B Results

Hi Richard

The note looks good but I would not include the RG-A and GlueX comparison in the note. It really should just be what is intended to be released.

I agree that you will probably be asked and you can answer, but this release note and release meeting is not the place to discuss detailed comparisons of a work that is still in progress.

The message should be internal consistency within RG-B and the first extraction form the neutron, plot 1.

Cheers
Bryan

___________________________________

Dr. Bryan McKinnon

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

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


On 22 May 2024, at 16:52, Richard Tyson via Clas12_dileptons <clas12_dileptons at jlab.org> wrote:


Hi All,

As you may know, Patrick asked for results from RG-B that he can show at  the International Conference on Beauty, Charm, Hyperons in Hadronic Interactions (BEACH 2024)<https://urldefense.proofpoint.com/v2/url?u=https-3A__indico.fnal.gov_event_62069_&d=DwMGaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=44Qn3aE7EeA6RlFq7hjp1Q&m=Ij-HU69qH-xiFa_kO7sHBnLQYgKXLhyBTnG_emYURPBf8c_FRaqPbShV8uA862tr&s=aUUxZncSNHQAl0AyxBL0qwtNZq36bKdaifLDuRclMLA&e=>. After speaking with Maxime, he asked me to produce a (short) release note. This is attached, any feedback is welcome.

Maxime asked me to present the note at the DWPG tomorrow. Sorry for the short notice in having a look over the note, I was also only asked to do this yesterday! I don't think there's anything especially new or controversial so please don't feel like you have to review this in a great amount of detail.

For convenience, I've attached the two main plots. First the cross section in AU for J/psi produced on proton and neutron. This has been updated with all three available RG-B datasets, and contains the same information as the previous plot that I circulated.

Second a comparison between RG-A, RG-B and Gluex. This is not intended for release, and is clearly marked as such in the plot and in the note. The reason why I included it in the note is that I assume one of the first questions I will get is on the consistency with RG-A. As my analysis is not as far along as Pierre's, and in order to make a sensible comparison to RG-A, I used the same radiative corrections and normalisation that Pierre extracted for the RG-A analysis. As you can see, there is a relatively good agreement between RG-A and RG-B which shows consistency between the analyses. I wasn't sure if this would be appropriate in the note, so please let me know if you think I should remove this and I will do so.

Thanks in advance for having a look over this and for your comments!

Cheers,
Richard
<RGB_Jpsi_Release_Note_Short.pdf>
<xSect.png>
<xSect_comp.png>
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