[Clas12_rgh] [EXTERNAL] RGH Jeopardy document

[silvia at jlab.org]

Hi Anselm,
in our DVCS count-rate estimate we are taking RGA Fall18 data for pDVCS
and rescaling them by a RGH/RGA acceptance ratio (from gemc simulations of
the two run periods), times a ratio of the luminosities and beam times of
the two RGs. For RGH we have used 5*10^33 lumi and 100 days of beam time.
For RGA we have been having a hard time getting feedback from various RGA
members on how many PAC days Fall18 corresponds to. We were finally given
the integrated charge. Assuming a luminosity of 0.8*10^35 for RGA, we
deduced roughly 10 days of beam time for the inbending dataset.
So the lumi factor RGH/RGA comes out to be 100/10*(5*10^33/0.8*10^35)=0.6.
Then you need to fold in the acceptance ratio, which depends on your
reaction.
Best regards,
Silvia


> 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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