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

[Sungkyun Park]

Eugene,

All plots I made use the MVRT bank now. 

I only want to know if there are big differences in z-Vertex distribution  when I use MVRT bank or GPID bank in several cases. (that is , ranges of the different proton momentum or theta angle).

 - Sung


----- Original Message -----
From: Eugene Pasyuk <pasyuk at jlab.org>
Date: Monday, November 1, 2010 3:33 pm
Subject: Re: [Frost] The basic cuts, Energy Correction, and Momentum Correction of FSU in FroST
To: frost at jlab.org

> Sung,
> 
> Why don't you use vertex from MVRT bank? It gives a better estimate 
> of 
> the vertex position especially when you have two or more tracks in 
> the 
> event. We discussed this at one of the meetings and recommendation 
> was 
> to use MVRT bank.
> 
> -Eugene
> 
> 
> 
> 
> On 11/1/10 3:26 PM, Sungkyun Park wrote:
> > 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
> >>>>
> >>> _______________________________________________
> >>> Frost mailing list
> >>> Frost at jlab.org
> >>> https://mailman.jlab.org/mailman/listinfo/frost
> >>>
> >>
> >
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