[Gdh_lowq2] EG4 meeting

[bosted at jlab.org]

Dear Xiaochao et al.,
   Thanks for the update!
   As some of you know, I have analyzed A_LL, A_LU, and A_UL for
exclusive pi+, pi0, pi-, and eta with 6 gev electrons. The Analysis
Note is presently being looked at by a review committee. They
will probably also ask about physics, as well as comparisons to
other data. Xiaochao, would you be willing to send me the text
files as well? If the student has any trouble converting the ntuples,
I can also write a little fortran program to do the conversions,
or help them debug their code if it doesn't work.
   I will then make some plots comparing the 6 GeV pi+ data to the 3 GeV
data, in the region of overlap. RIght now I'm making a similar plot,
comparing to Josh Pierce's results for 4.2 GeV electrons.
   I'm trying to make a rough empirical fit to all world exclusive
data: basically extending MAID to W>1.6 and Q2>1, since it works "OK"
at lower W and Q2. It is very poor for W>1.9 and Q2>1, though.
   Thanks in advance!
   Peter


> Dear Alexandre and all:
>
> I am never able to attend this meeting so it might help to provide an
> update on the exclusive analysis by email:
>
> As some of you know, we received the review on our analysis note last
> fall. Reading through the review, the major concern is what physics
> conclusion can we draw from these results?  I discussed this with the
> exclusive group and we think the best way is to send the results to Igor
> and have him look at it. He will be able to compare the new data with all
> existing ones and come up with ideas.
>
> Igor requested the data in plain text form, while my data were stored in
> ntuples.  I asked one of my 2nd-year students to work on the format
> conversion. It has been about two weeks and he has been making some
> progress. Once he completes for one kinematics, I will do a cross check
> and send the plain-text data to Igor, and we will proceed from there.
>
> Thanks for your attention.
>
> Xiaochao
>
> PS is today already Jan. 28th?
>
>
> ----- Original Message -----
> From: "Alexandre Deur" <deurpam at jlab.org>
> To: "gdh lowq2" <gdh_lowq2 at jlab.org>
> Sent: Monday, January 27, 2014 1:33:57 PM
> Subject: [Gdh_lowq2] EG4 meeting
>
> Dear EG4 collaborator,
>
> We will have our EG4 analysis meeting today (Jan 28th) at
> 9:30am (EST) in room F227. Instructions to call-in can be found at:
>
> http://www.jlab.org/Hall-B/secure/eg4/deur/call_in_procedure.html
>
> Best regards,
>
> Alexandre
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