[Clas12_rgh] [EXTERNAL] RGH Jeopardy document

Sat Apr 6 20:11:05 EDT 2024

Dear All,

Matthew worked on SIDIS simulations that he will show Monday.
He will look at single and di-hadron asymmetries.
I talked to Andreas Metz from Temple who I work with on EIC impact studies and he told me that they can try to come up with impact studies using RGH pseudodata in the next two weeks (but no promises).

I also promised Marco to work on the SIDIS part in the next few days.

One question though about the anticipated statistics: I see the dilution and polarization factors for the target in the document but it is not clear to me how the anticipated integrated luminosity compares to a given RGA period.

>From the conservative luminosity estimate, I would get a factor 20 less but how much running time is requested? Is 1/20th of the RGA statistics reasonable?

What are the DVCS projections using?

Thanks,

Anselm

________________________________________
From: Clas12_rgh <clas12_rgh-bounces at jlab.org> on behalf of Silvia Niccolai via Clas12_rgh <clas12_rgh at jlab.org>
Sent: Saturday, April 6, 2024 12:40 PM
To: Volker Burkert
Cc: clas12_rgh at jlab.org
Subject: Re: [Clas12_rgh] [EXTERNAL] RGH Jeopardy document

Hello all,
Sebastian, Adam and I are working on DVCS projections, I’ll include them tomorrow and update the text accordingly.
Best regards,
Silvia
Sent from my iPhone

On 6 Apr 2024, at 18:25, Volker Burkert via Clas12_rgh <clas12_rgh at jlab.org> wrote:

Thank you Chris!
      Much improved on the polarized target.
Volker

________________________________
From: Christopher Keith <ckeith at jlab.org>
Sent: Saturday, April 6, 2024 9:10 AM
To: clas12_rgh at jlab.org <clas12_rgh at jlab.org>; mcontalb at fe.infn.it <mcontalb at fe.infn.it>; Volker Burkert <burkert at jlab.org>
Subject: Re: [Clas12_rgh] [EXTERNAL] RGH Jeopardy document

Hi Volker,
Take a look at the jeopardy document again.  I did some editing yesterday afternoon.  There is a new, longer Target section, and references to the bulk superconducting magnet and Hall C magnet have been commented out.

Chris
________________________________
From: Clas12_rgh <clas12_rgh-bounces at jlab.org> on behalf of Volker Burkert via Clas12_rgh <clas12_rgh at jlab.org>
Sent: Friday, April 5, 2024 10:27 PM
To: clas12_rgh at jlab.org <clas12_rgh at jlab.org>; mcontalb at fe.infn.it <mcontalb at fe.infn.it>
Subject: Re: [Clas12_rgh] [EXTERNAL] RGH Jeopardy document

Dear Marco,

I have read the draft and have a few comments that I list here.

  1.
In section 2  Physics highlights under GPD E it says that "Its measurement in ... DVCS  requires a transversely polarized proton target as a complementary approach to the beam spin asymmetry of an unpolarized neutron target"  I think this formulation is misleading as it could be interpreted that a measurement on a transverse polarized proton target is equivalent to a measurement of the beam spin asymmetry on an unpolarized neutron target. This would be incorrect as  the measurement on a neutron target measures E^n, while the transverse proton target measures E^p. These are obviously different quantities.

  2.
Section 3.3  - Bulk Magnet.  I am not sure if we should include a fairly long section into the discussion, as this was only relevant for the HDIce option.

  3.
I have some concern on including anything on the Hall C polarized target in the presentation. It could cause a discussion that we not necessarily want as it just distracts from focusing on our solution to the HDIce problem. If for some reason anyone would bring it up we should be prepared to address it.

  4.
Minor typos: Section 4.1. The luminosity 10x10^35 = 10^36 should be just 10^35. The "1 mrad in azimuthal angle" should be " 1 mrad in polar angle".

  5.
Section 5 Physics Observables. I suggest to replace 12 GeV with 10.6 GeV or 11 GeV.

Best regards,
Volker

________________________________
From: Clas12_rgh <clas12_rgh-bounces at jlab.org> on behalf of Marco Contalbrigo via Clas12_rgh <clas12_rgh at jlab.org>
Sent: Monday, April 1, 2024 7:15 AM
To: clas12_rgh at jlab.org <clas12_rgh at jlab.org>
Subject: [Clas12_rgh] [EXTERNAL] RGH Jeopardy document

Dear all,
a draft of the RGH jeopardy document has been opened
on overleaf. You can access it via

https://urldefense.proofpoint.com/v2/url?u=https-3A__www.overleaf.com_read_hsmmsyrcbrbm-23a78ab6&d=DwIBAg&c=CJqEzB1piLOyyvZjb8YUQw&r=QWa4FYrGl2z7tyOHBIYcegdYaNKy_NApZOlUL0J3DAI&m=U0h7CvSrGo84Dcp2l9ksvTIjRAz93gEI1DoJYrNskJW6O3n-D4BvXACmk7_lCVox&s=oHCIemsXaYK6DXaH6ufh-8_RnQqK55wLu2t54a3xanU&e=

Comments and suggestions are welcome. If you like to
have writing permission, just let me know.

Thanks, Marco.

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