[Frost] The basic cuts, Energy Correction, and Momentum Correction of FSU in FroST

[Sungkyun Park]

Hi Michael,

I also think the large shift of the lambda pulls in butanol target will be solved after applying the holding fields correction. If not, I will be in panic. 

Now I make correction factors of momentum correction from the CH2 data. The mean values of pull in CH2 target are located between -0.1 and 0.1. I also correct mean values in this range. Thus the current momentum correction can not correct -0.388, the pull's mean of the lambda (pi-) in the butanol target. 

I also added what particle's z-vertex is used in each topology in updated web (Z-Vertex).
simply speaking, I use the z-vertex of proton in GPID bank in each topology except the topology gamma p -> pi+ pi- (p). in missing proton topology, I used the z-vertex of pip in GPID.

Thank you for your comments.

Sung
Florida State University





----- Original Message -----
From: Michael Dugger <dugger at jlab.org>
Date: Monday, November 1, 2010 2:51 pm
Subject: Re: [Frost] The basic cuts, Energy Correction, and Momentum Correction of FSU in FroST
To: Sungkyun Park <sp06k at fsu.edu>
Cc: FROST <frost at jlab.org>

> 
> Hi,
> 
> I think it would be surprising if the problem is not due to the 
> holding 
> field.
> 
> I put an additional line on the wiki:
> "It is also worth noting that the means for the λ pulls for each 
> particle 
> coming from the CH2 are negative and small, whereas the means for 
> λ pull 
> coming from Butanol, are positive for positive particles, and 
> negative for 
> negative particles (and always large)"
> 
> 
> -Michael
> 
> On Mon, 1 Nov 2010, Michael Dugger wrote:
> 
> >
> > Sung,
> >
> > Thanks for updating the "Standard practices, common practices, 
> and common
> > analysis issues for g9a" web page :)
> >
> > Comments:
> > * For the z-vertex using GPID (TBTR) you should state what 
> particle is
> > being used.
> >
> > * The CH2 pull angles look OK, but the Butanol lambda angles are
> > especially bad. This might be explained by the target magnetic
> > holding-field (I think that Eugene and Franz made this sort of 
> statement> during one of the meetings where you showed these 
> pulls). I added a line
> > about this to the wiki (including a link to your webpage).
> >
> > Let's hope that the holding field corrections get this lambda angle
> > problem fixed.
> >
> > Good job.
> >
> > Take care,
> > Michael
> >
> > On Mon, 1 Nov 2010, Sungkyun Park wrote:
> >
> >> Hi all,
> >>
> >> I have updated the EC and MomC of FSU, we mentioned at the last 
> Friday meeting
> >>
> >> 1. The Basic Cut
> >>  http://www.jlab.org/Hall-B/secure/g9/sungkyun/11-1-10-ZVertex.html
> >>
> >> * I compare Z-vertex made in MVRT bank with GPID bank in several 
> cases.>> * I put the basic cuts used to make the z-vertex 
> distribution.>>
> >> 2. The FSU EC
> >>  http://www.jlab.org/Hall-B/secure/g9/sungkyun/11-1-10-FSUEC.html
> >>
> >> * I put the equation of FSU Energy Correction.
> >> * I compare FSU-EC with CMU-EC in several cases.
> >>
> >> 3. The FSU-MomC
> >>  http://www.jlab.org/Hall-B/secure/g9/sungkyun/11-1-10-FSUMomC.html
> >>
> >> * I put the preliminary version of momentum correction
> >> * I put the resolution parameters for three kinds of targets, 
> used in the covariance matrix.
> >>
> >> If you have some questions or comments, Let me know them
> >>
> >> Sungkyun Park
> >> Florida State University
> >> _______________________________________________
> >> Frost mailing list
> >> Frost at jlab.org
> >> https://mailman.jlab.org/mailman/listinfo/frost
> >>
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> >
>