[Clas_hadron] [EXTERNAL] IoP Talk on J/psi photoproduction

[Susan Schadmand]

Hi Richard,

that's a very nice talk!
I have comments and some questions, see below.

Best regads,
Su.


General comments:
* I feel that it is not so practical to have the references on the last 
page. In a talk, the audience needs to see a reference on the same and 
every page that mentions it. (Also better for extracting a page 
post-presentation).

* To my taste, there is too much prose on your slides, especially since 
I expect you will go through the slides rather fast.

* I would prefer that the motivational pages (5,6) come first and then 
the experimental approach, after that analysis, ...


In detail:
* On page 3, Maybe indicate that the beam comes from the right (which is 
unconventional 'on paper'). On page 8 it is 'the right way around'. 
Actually, I would rotate CEBAF and CLAS on page 3 so that you have a 
similar perspective as on page 2.
* CHL-2 is indicated but you do not mention it.
* As you are referring to GlueX later, I would reduce the labeling of 
the halls:
halls A, B, C --> Hall B: CLAS12
hall D --> Hall D: GLueX

* page 6:
  I thought you will change collaborations during your talk ;) Here, I 
feel CLAS12 belongs in the headline!

     𝑃𝐶+resonances at the LHCb (2019) --> 𝑃𝐶+resonances with CLAS12

     CLAS12 should be able to place upper limits on the branching 
fraction B(𝑃𝐶+→ ψ p) from CLAS12 data.

* On page 9:
Muons are required to have mip like energy deposition... --> Muon 
candidates are minimum inonizing, with a significant charged pion 
contamination.

* page 11:

     𝑒+𝑒−produced on a bound proton in the deuteron target.
     question: why muons from p and e+e- from bound p?

Electron radiation in the detector
     question: what exactly does that include? means you have not done 
simulatons/kfit yet?
     viz, you should say that that will be fixed.
     what about radiative corrections?

     peak to away --> peak away

     only a subset of all available data
     comment: always say how many percent

* page 12:

     photoproduction cross sections are predicted to provide unique 
insight  --> photoproduction cross sections provide unique insight

     Several CLAS12 analyses aiming for these measurements are ongoing 
and well
advanced, as they have well defined event and particle identification 
techniques.

Several CLAS12 analyses aiming for these measurements are ongoing and well
advanced, as they have well defined event and particle identification 
techniques. -->
Several CLAS12 analyses are ongoing for 𝑒𝑝→→(𝑒′)𝑒+𝑒−p
     * Joseph Newton,  J/ 𝜓 photoproduction
     * Pierre Chatagnon,  Timelike Compton Scattering

Next, we aim to calculate the total and differential cross sections for 
the proton and
deuterium targets. -->
Next: total and differential cross sections for the proton and deuterium 
targets

This is a collaborative effort, involving the whole of the CLAS12 
collaboration, and in
particular Joseph Newton’s work on J/ 𝜓 photoproduction in the 
𝑒𝑝→→(𝑒′)𝑒+𝑒−p channel and Pierre Chatagnon’s work on Timelike 
Compton Scattering in the same channel.


On 02.04.21 15:10, Richard Tyson (PGR) wrote:
> Hi,
>
> I'm going to give a talk on "J/ψ near threshold photoproduction at 
> CLAS12" at the upcoming IoP conference 
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__appheppnp2021.iopconfs.org_home&d=DwMFCQ&c=CJqEzB1piLOyyvZjb8YUQw&r=33hEheRcHuqzMP4K5hhMDPge6hQHiwXozGe7lR_eSfg&m=u6I1gvh0kbXC2s4z5iJqCqc4tXtP-9hKbdx0pyjgzJU&s=pkA04KqWSSaEtPyLQiJuoce2mwYOYwhfwj95OuWg-Tk&e=> 
> (12th-15th of April). I've already ran this by the dilepton work group 
> but wanted to check that this also fine with you all. I've attached my 
> slides; any feedback is welcome!
>
> Thanks, Richard
>
>
> _______________________________________________
> Clas_hadron mailing list
> Clas_hadron at jlab.org
> https://mailman.jlab.org/mailman/listinfo/clas_hadron

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/clas_hadron/attachments/20210405/13d1ff38/attachment.html>