[Deeppwg] [Clas12_deepana] [EXTERNAL] CLAS12 Deep Process Analysis Meeting

[Francois-Xavier Girod]

Dear Kyungseon

I do not have any correlation between variables in this analysis. I
analyzed the resolutions on vertex variables directly, and you could say I
took the error matrix to be diagonal. This is all I can do at the moment. I
still think this work is valuable, in addition to quantify the resolution
differences between GEMC and data, this work also addresses whether we have
systematic pulls in the reconstruction of vertex variables, and the size of
these pulls.

I did not look at the existing correlation matrix in the data, as I
understand when people say we cannot currently perform a kinematic fit,
they mean that this error matrix is not final, or even maybe incorrect. I
do hope that the tracking error matrix information will be updated for the
next release. Otherwise I think it will be difficult to trust our kinematic
resolutions for publication.

If you take a look at the references to notes I sent, you can see people
doing either method. Clearly the method using the tracking error matrix and
correlations is better method, and what we want to use ultimately.

Best regards
FX

On Thu, Nov 14, 2019 at 4:58 PM Joo, Kyungseon <kyungseon.joo at uconn.edu>
wrote:

> Dear FX,
>
> What did you use for covariance matrix elements, which is not currently
> available from CLAS12?  Thanks.
>
> Kyungseon
>
> Kyungseon JOO
> Professor of Physics
> University of Connecticut
> Storrs, CT 06269
> http://www.phys.uconn.edu/~kjoo
> ------------------------------
> *From:* Deeppwg <deeppwg-bounces at jlab.org> on behalf of Francois-Xavier
> Girod <fxgirod at jlab.org>
> *Sent:* Thursday, November 14, 2019 10:33 AM
> *To:* deeppwg <deeppwg at jlab.org>
> *Subject:* Re: [Deeppwg] [Clas12_deepana] [EXTERNAL] CLAS12 Deep Process
> Analysis Meeting
>
>
> Dear all
>
> Following up on a question I just received at the DPWG meeting, please
> find below a few references to the previous CLAS notes on kinematic fitting
>
> M. Williams and C.A. Meyer CLAS 2003-017
> https://www.jlab.org/Hall-B/notes/clas_notes03/03-017.pdf
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__nam01.safelinks.protection.outlook.com_-3Furl-3Dhttps-253A-252F-252Fwww.jlab.org-252FHall-2DB-252Fnotes-252Fclas-5Fnotes03-252F03-2D017.pdf-26data-3D02-257C01-257Ckyungseon.joo-2540uconn.edu-257C7441324d931a47820bce08d7691820b4-257C17f1a87e2a254eaab9df9d439034b080-257C0-257C1-257C637093424668755432-26sdata-3Dq-252BzYS8G0HBHF8jNdYLqoOrjkfHk9Qqr0xXtJPGo-252FTQE-253D-26reserved-3D0&d=DwMFAg&c=CJqEzB1piLOyyvZjb8YUQw&r=Qqa99n-9Sh38Pt7dXQ56SA&m=2EXhmGPx3CV8-9i6Agia18w_U5EpLA7Mbrd8A1V0vrQ&s=yB8NzAosAqxCleqRrBPoaZh3a49NChTveYlLwQNdDnE&e=>
>
> D. Keller CLAS 2010-015
>
> https://misportal.jlab.org/ul/Physics/Hall-B/clas/viewFile.cfm/2010-015.pdf?documentId=614
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__nam01.safelinks.protection.outlook.com_-3Furl-3Dhttps-253A-252F-252Fmisportal.jlab.org-252Ful-252FPhysics-252FHall-2DB-252Fclas-252FviewFile.cfm-252F2010-2D015.pdf-253FdocumentId-253D614-26data-3D02-257C01-257Ckyungseon.joo-2540uconn.edu-257C7441324d931a47820bce08d7691820b4-257C17f1a87e2a254eaab9df9d439034b080-257C0-257C1-257C637093424668765424-26sdata-3DEp82wnKt1dV9Kgil-252FUBRK3c5z6KDIlxdSqLqjAZzJz4-253D-26reserved-3D0&d=DwMFAg&c=CJqEzB1piLOyyvZjb8YUQw&r=Qqa99n-9Sh38Pt7dXQ56SA&m=2EXhmGPx3CV8-9i6Agia18w_U5EpLA7Mbrd8A1V0vrQ&s=mvQJObch_3Z-MhBSKvq7krbd6YBZFDvNe9MeOo6Bo3g&e=>
>
> F. Sabatie CLAS 2003-010
> https://www.jlab.org/Hall-B/notes/clas_notes03/03-010.pdf
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__nam01.safelinks.protection.outlook.com_-3Furl-3Dhttps-253A-252F-252Fwww.jlab.org-252FHall-2DB-252Fnotes-252Fclas-5Fnotes03-252F03-2D010.pdf-26data-3D02-257C01-257Ckyungseon.joo-2540uconn.edu-257C7441324d931a47820bce08d7691820b4-257C17f1a87e2a254eaab9df9d439034b080-257C0-257C1-257C637093424668765424-26sdata-3DUWeN1mzhihMJJSR2T0w-252BBhqc-252FuSskbi-252Btbyq2rFSNMs-253D-26reserved-3D0&d=DwMFAg&c=CJqEzB1piLOyyvZjb8YUQw&r=Qqa99n-9Sh38Pt7dXQ56SA&m=2EXhmGPx3CV8-9i6Agia18w_U5EpLA7Mbrd8A1V0vrQ&s=WaRB3iFYc6sXZfpR8Hcj2zmEjYYf1BB43FjGwmsjxho&e=>
>
> Best regards
> FX
>
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