[Clas_hadron] [G14_run] Draft slides for my talk on NSTAR2013

[Igor Strakovsky]

Eugene,

If g14 analysis is using pi- to get gn-->pi-p from gd-->pi-pp then it
is difficult task but that is doable for specific kinematics.  Meanwhile
there is a cut-of for charged pions as well, say 100 MeV/c - please
correct if I am wrong

igor


On Tue, 21 May 2013 09:30:41 -0400 (EDT), Eugene Pasyuk <pasyuk at jlab.org> 
wrote:

> Igor, 
> 
> Your statement about threshold for proton would be correct if we would 
>attempt to detect spectator proton.
> We don't do that, spectator is reconstructed as a missing particle. For 
>missing particle there is no threshold problem. If you look at the spectrum 
>you will see it starts at 0.
> 
> -Eugene
> 
> ----- Original Message -----
>> From: "Igor Strakovsky" <igor at va.gwu.edu>
>> To: "Reinhard Schumacher" <schumacher at cmu.edu>, "Tsuneo Kageya" 
>><kageya at jlab.org>
>> Cc: "g14 run" <g14_run at jlab.org>, "CLAS Hadron Spectroscopy" 
>><clas_hadron at jlab.org>
>> Sent: Tuesday, May 21, 2013 9:25:23 AM
>> Subject: Re: [G14_run] Draft slides for my talk on NSTAR2013
>> 
>> Dear Reinhard,
>> 
>> I am afraid to try to correct you but the "select quasi-free
>> neutrons"
>> condition is not possible for CLAS.  CLAS cannot make a deal with
>> proton
>> with p < 200 MeV/c - there is a cut-off.  The 'quasi-free neutron'
>> term
>> is applying to the protons for p = 50 MeV/c or less.
>> 
>> Best, Igor
>> 
>> On Tue, 21 May 2013 09:18:49 -0400, Reinhard Schumacher
>> <schumacher at cmu.edu>
>> wrote:
>> 
>> > Hello Tsuneo,
>> > 	I took a look at your slides for NSTAR2013 and have a few
>> > 	suggestions
>> > about them.  Overall, they look to be in good shape.
>> > 
>> > Slide 11:  the position of the coplanarity cuts seems quite
>> > arbitrary.
>> > I would ask:  how does the result change if you double the width of
>> > the cut?
>> > 
>> > Slide 13: For this slide you state the energy range as 1.1 to 1.3,
>> > whereas the previous two slides had 0.7 to 1.3.  For consistency,
>> > maybe
>> > keep the energy range the same?  Also, on this slide you have the
>> > phrase
>> > "excludes bound neutrons".  This is needlessly obscure and not
>> > strictly
>> > correct.  Maybe you want to say "select quasi-free neutrons"
>> > 
>> > Have a great trip.
>> > 
>> > Reinhard.
>> > 
>> > ___________________________________________________________________
>> > Reinhard Schumacher         Department of Physics, 5000 Forbes Ave.
>> > Carnegie Mellon University, Pittsburgh, PA 15213, U.S.A.
>> > phone: 412-268-5177         web: www-meg.phys.cmu.edu/~schumach
>> > ___________________________________________________________________
>> > 
>> > On 05/20/2013 11:12 PM, Tsuneo Kageya wrote:
>> >> Hi,
>> >>
>> >>   I would like to get some comments and suggestions for my slides
>> >>   on
>> >>NSTAR2013.
>> >> My talk is related to the preliminary double spin asymmetries on
>> >> g14
>> >>experiments.
>> >> I have 20 minutes including the discussion.
>> >> I got comments from Volker and others when I showed slides and
>> >> tried talking
>> >>about this this Monday.
>> >> I modified based on their comments, but I have still homework to
>> >> do; page
>> >>10, need to show the graph
>> >> with colors.   Most of others have been changed.
>> >>
>> >>   Some of you may have different aspects; please let me know, if
>> >>   you have
>> >>comments.
>> >> A pdf file is attached.
>> >>
>> >>         Regards, Tsuneo Kageya.
>> >>
>> >>
>> >>
>> >>
>> >>
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>> 
>> Igor Strakovsky, SAID CNS The George Washington University
>> Tel: 703-726-8344(NV),202-994-4742(FB),Skype: igors1945_2
>> Fax: 202-994-3001(FB),Emails: igor at va.gwu.edu, igor at jlab.org
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Igor Strakovsky, SAID CNS The George Washington University
Tel: 703-726-8344(NV),202-994-4742(FB),Skype: igors1945_2
Fax: 202-994-3001(FB),Emails: igor at va.gwu.edu, igor at jlab.org