[Clas12_dileptons] [EXTERNAL] Re: Slides for EUNPC

Bryan McKinnon Bryan.McKinnon at glasgow.ac.uk
Thu Oct 20 07:51:59 EDT 2022

Hi Richard

I appreciate the error bar is hidden on the last data point and it is more than large enough to be interpreted as agreement statistically, however the (spread of) point looks low to me. Maybe an artefact of the fit in that bin(?).   

Your idea to show cross-section ratios is a very good one actually. It makes the internal comparative point you are trying to make, without any “statement” about values. This is probably the way to go.


> On 20 Oct 2022, at 12:13, Richard Tyson (PGR) via Clas12_dileptons <clas12_dileptons at jlab.org> wrote:
> Hi everyone,
> Thanks for your advice, this is very much appreciated!
> I've attached a new version of the total cross section plot, changed based on your recommendations. The points have changed slightly, as mentioned in another email yesterday I changed the exact cut values to be more in line with the RG-A analysis. Also note Bryan there wasn't discrepancy between the bound neutron and others, just the way I plotted it the error bars were hidden (which wasn't the right way to plot this anyways). 
> I understand though if the sentiment is that it is too early to show this plot. The reason why I wanted to include this is to show that the analysis is progressing and we have good consistency between different channels at CLAS12. Instead of the total cross section I could also plot ratios, to show good agreement between channels without showing the cross section. Let me know what you think is best!
> Thanks again,
> Richard
> From: Valery Kubarovsky <vpk at jlab.org <mailto:vpk at jlab.org>>
> Sent: 19 October 2022 22:46
> To: Clas12_dileptons at jlab.org <mailto:Clas12_dileptons at jlab.org> <clas12_dileptons at jlab.org <mailto:clas12_dileptons at jlab.org>>; Richard Tyson (PGR) <r.tyson.1 at research.gla.ac.uk <mailto:r.tyson.1 at research.gla.ac.uk>>
> Subject: Re: Slides for EUNPC
> Hi Richard,
> Your key slide is #12 - total cross section.
> You mentioned that the y-axis is AU. However, it is clear for the experts that the xs values are very close to nb. I am not sure that we are ready to show this plot as it is in your presentation.
> Let me suggest to change y-axis to some really arbitrary scale, say from 0 to 1.
> Your 3 xs points are very difficult to read. You may consider to shift these points along x-axis by some offset. 
> I have some other remarks but prefer to talk with you by zoom. It is not critical, just some suggestions to better organize your slides.
> Best regards,
> Valery
> From: Clas12_dileptons <clas12_dileptons-bounces at jlab.org <mailto:clas12_dileptons-bounces at jlab.org>> on behalf of Richard Tyson (PGR) via Clas12_dileptons <clas12_dileptons at jlab.org <mailto:clas12_dileptons at jlab.org>>
> Sent: Tuesday, October 18, 2022 11:33
> To: Clas12_dileptons at jlab.org <mailto:Clas12_dileptons at jlab.org> <clas12_dileptons at jlab.org <mailto:clas12_dileptons at jlab.org>>
> Subject: [Clas12_dileptons] [EXTERNAL] Slides for EUNPC
> 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=jsuHJvZltBfNoE12ZB2mBPyDG2wcNuxiKB_RQsgdKh0&m=ePNVAXp-VlqpgfE1JWDoc0ACxG5F4hSzbBNptLJe9sYwBTwf6Pd1IV_6UveLqo1T&s=UqcR-5pBvrQjzOBedTLQicMympYSXwE5wO9XR2A2luc&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
> <Screenshot 2022-10-20 at 12-02-47 xSect_RComp.png (PNG Image 1356 × 1344 pixels) — Scaled (55%).png>_______________________________________________
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Dr. Bryan McKinnon

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

Tel: (+44/0) 141-330-7226

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