[clas12_rgk] [EXTERNAL] Pass1 Data Processing Request for RG-K

Wed Jul 8 10:39:42 EDT 2020

Swapped cables happen all the time, we certainly have published data from
the 6 GeV era which were taken with swapped cables
We just need to know about this to cut them out of the acceptance

This should not be a problem at all

But of course if the central tracker is unable to even detect swapped
cables, then yes we have a major competence problem there

On Wed, Jul 8, 2020 at 4:30 PM <mdefurne at jlab.org> wrote:

> Dear FX,
>
> As I told you last week, RG-B has been approved for pass-1 with swapped
> Micromegas cables (75% sure). If it is confirmed, they will have to re-run
> reconstruction to correct for that if they want to publish DVCS on proton.
> Since same review was performed for rg-A, there is no guarantee that we do
> not have such issues. Moreover, at no moment, the RG-A review was
> performed assuming DVCS would be published with this pass-1
> reconstruction.
>
> I asked to look at MVT residuals to check if there are any swapped cables
> for rg-A analysis note (and I contacted rg-b for cross-check) but official
> central tracking does not produce this residuals in the current version of
> the tracking. (So I am still waiting for confirmation for RG-B)
>
> I do not think corrections of possible swapped cables in micromegas are
> unnecessary improvements to central tracking. I am not advocating for the
> best central tracking. But having swapped cables is definitely not
> acceptable. Recoil proton momentum is not only about kinematics but, as
> you said, you need to perform some cuts on variables requiring proton
> momentum to ensure exclusivity. And it is really on this last point I am
> concerned. You know too well that pi0 contamination can be sizable in bins
> where DVCS is weak. So we must be careful to not dilute the asymetry with
> poor exclusivity cuts.
>
> Having extensively studied CVT reconstruction, I can assure you that
> proton momentum can already be significantly mis-reconstructed under
> reasonable beam condition without swapped Micromegas cables. So if we can
> make sure we do not have swapped cables, then let's do it. Last but not
> least, if a tracking code is not able to tell you that cables has been
> swapped, then it tells you that its current accuracy/resolution might not
> be great. Would it be enough with no swapped cable, It is an open question
> and I haven't seen a solid study demonstrating that. It is true that I
> personnally decided to dedicate time to fix central tracking than try to
> carefully check if it is good enough.
>
> We may want to see this as an opportunity to perform careful checks of
> silly mistakes prior cooking everything.
>
> Kind regards,
>
> Maxime
>
> > Dear all
> >
> > To clarify the DVCS plans, we do not need any improvement to the central
> > tracking for publication and I think this was laid out in our answer to
> > the
> > committee
> >
> > In fact for all exclusive reactions, also for exclusive pi0 or exclusive
> > phi production, we can calculate the reaction kinematics using the
> forward
> > going particles.
> > I showed to the collaboration during the First Experiment meeting that we
> > get even better resolutions with this strategy
> > We only need the central detector to identify the recoil and perform
> > exclusivity cuts, this was shown to the collaboration many times now and
> > are not an issue at all
> >
> > The CCC should know this. The Deep Process Working Group chair is part of
> > the CCC.
> > At this point I can only wonder why we are getting mixed messages from
> the
> > CCC.
> >
> > Best regards
> > FX
> >
> >
> > On Mon, Jul 6, 2020 at 4:08 PM Daniel Carman <carman at jlab.org> wrote:
> >
> >> Annalisa,
> >>
> >> I definitely can be available to discuss this issue with the CCC for
> >> RG-K
> >> cooking. I want
> >> clarity on exactly when RG-K can begin cooking and to make clear to the
> >> CCC our plans for
> >> initial data analysis. However I do not think that our analysis plans
> >> should be strongly coupled
> >> to when cooking begins.
> >>
> >> Regards,
> >> Daniel
> >>
> >>
> >>
> *****************************************************************************
> >> *
> >> * Dr. Daniel Carman              e-mail: carman at jlab.org
> >> <carman at jlab.org>
> >> * Staff Scientist                 office: (757)-269-5586
> >>
> >> * Jefferson Laboratory       web: http://userweb.jlab.org/~carman
> >> *
> >>
> >>
> *****************************************************************************
> >>
> >>
> >> On Jul 6, 2020, at 9:56 AM, Annalisa D'Angelo <
> >> annalisa.dangelo at roma2.infn.it> wrote:
> >>
> >> Dear All,
> >> this is the "unexpected" reply from Kyungseon. I think it would be
> >> useful
> >> to have a meeting with the CCC on BJ, where at least Dan, FX, Volker and
> >> myself should participate.
> >> If you agree I will ask for a formal meeting.
> >> All the best
> >> Annalisa
> >>
> >>
> >> -------- Messaggio Inoltrato --------
> >> Oggetto: Re: [EXTERNAL] Pass1 Data Processing Request for RG-K
> >> Data: Mon, 6 Jul 2020 13:47:18 +0000
> >> Mittente: Joo, Kyungseon <kyungseon.joo at uconn.edu>
> >> <kyungseon.joo at uconn.edu>
> >> A: annalisa.dangelo at roma2.infn.it <annalisa.dangelo at roma2.infn.it>
> >> <annalisa.dangelo at roma2.infn.it>, kjoo at jlab.org <kjoo at jlab.org>
> >> <kjoo at jlab.org>
> >>
> >> Dear Annalisa,
> >>
> >> I hope that this email finds you well and healthy.  The situation in US
> >> is
> >> getting even more dire and the worst part is that it seems that people
> >> don't care much including the president.
> >>
> >> Regarding data processing request for RG-K, CCC met last week to discuss
> >> it and is concerned about your RG-K's plan for central tracking use.  If
> >> central tracking will be used in your physics analysis even at the
> >> minimum
> >> level which is not clearly defined, we need to make sure that we
> >> understand
> >> your plan and the review for that part is in place. Please provide us
> >> some
> >> more details about it. If desirable, we could have a short BJ meeting.
> >> Thanks.
> >>
> >> Best regards, Kyungseon
> >>
> >>
> >>
> >> Kyungseon JOO
> >> Professor of Physics
> >> University of Connecticut
> >> Storrs, CT 06269
> >> http://www.phys.uconn.edu/~kjoo
> >> <
> https://urldefense.proofpoint.com/v2/url?u=http-3A__www.phys.uconn.edu_-7Ekjoo&d=DwMD-g&c=CJqEzB1piLOyyvZjb8YUQw&r=t2OnxVoP8YJyzuxpHKwj1tmrMj6s1mZ4pgV16sZJZb8&m=7xceQEIQ2uM90Q0ANQaxjLCSGGE8B3wKY1d1YPhUofQ&s=S7APDtRiYNMWdD9qh2N3sB2-5klNNRbwT6WmY18nFPo&e=
> >
> >> ------------------------------
> >> *From:* Annalisa D'Angelo <annalisa.dangelo at roma2.infn.it>
> >> <annalisa.dangelo at roma2.infn.it>
> >> *Sent:* Saturday, July 4, 2020 2:57 AM
> >> *To:* Joo, Kyungseon <kyungseon.joo at uconn.edu>
> >> <kyungseon.joo at uconn.edu>;
> >> kjoo at jlab.org <kjoo at jlab.org> <kjoo at jlab.org>
> >> *Subject:* Re: [EXTERNAL] Pass1 Data Processing Request for RG-K
> >>
> >> *Message sent from a system outside of UConn.*
> >>
> >> Dear Kyungseon,
> >> I was wondering if you had discussed RG-K pass1 scheduling within the
> >> CCC.
> >> Have a great 4th of July.
> >> Annalisa
> >>
> >>
> >> Il 25/06/20 17:31, Joo, Kyungseon ha scritto:
> >>
> >> Dear Annalisa and Run Group K,
> >>
> >> Thanks for the request. CCC will discuss this soon and will get back to
> >> you.  Thanks.
> >>
> >> Best regards, Kyungseon
> >>
> >> Kyungseon JOO
> >> Professor of Physics
> >> University of Connecticut
> >> Storrs, CT 06269
> >> http://www.phys.uconn.edu/~kjoo
> >> <
> https://urldefense.proofpoint.com/v2/url?u=https-3A__nam10.safelinks.protection.outlook.com_-3Furl-3Dhttp-3A-252F-252Fwww.phys.uconn.edu-252F-7Ekjoo-26data-3D02-257C01-257Ckyungseon.joo-2540uconn.edu-257C34f5c8e0f8e84f778fc208d81fe77cd9-257C17f1a87e2a254eaab9df9d439034b080-257C0-257C0-257C637294426543856759-26sdata-3DYOgUZxrMo7XXh0jAMEHVoRKn2uL-252FG2-252BUs9juEVlOkeA-253D-26reserved-3D0&d=DwMD-g&c=CJqEzB1piLOyyvZjb8YUQw&r=t2OnxVoP8YJyzuxpHKwj1tmrMj6s1mZ4pgV16sZJZb8&m=7xceQEIQ2uM90Q0ANQaxjLCSGGE8B3wKY1d1YPhUofQ&s=VOAnwqhDklztRESzb-6t8zx789C5hl4RpfD_pe3rxF8&e=
> >
> >> ------------------------------
> >> *From:* Annalisa D'Angelo <annalisa.dangelo at roma2.infn.it>
> >> <annalisa.dangelo at roma2.infn.it>
> >> *Sent:* Wednesday, June 24, 2020 4:00 PM
> >> *To:* kjoo at jlab.org <kjoo at jlab.org> <kjoo at jlab.org>; Raffaella De Vita
> >> <Raffaella.Devita at ge.infn.it> <Raffaella.Devita at ge.infn.it>;
> >> mcontalb at fe.infn.it <mcontalb at fe.infn.it> <mcontalb at fe.infn.it>;
> >> Battaglieri Marco <Marco.Battaglieri at ge.infn.it>
> >> <Marco.Battaglieri at ge.infn.it>;bryan.mckinnon at glasgow.ac.uk
> >> <bryan.mckinnon at glasgow.ac.uk> <bryan.mckinnon at glasgow.ac.uk>;
> >> elfassi at jlab.org <elfassi at jlab.org> <elfassi at jlab.org>
> >> *Cc:* latifa at jlab.org <latifa at jlab.org> <latifa at jlab.org>;
> >> burkert at jlab.org <burkert at jlab.org> <burkert at jlab.org>; Francois-Xavier
> >> Girod-Gard <fxgirod at jlab.org> <fxgirod at jlab.org>; Viktor Mokeev
> >> <mokeev at jlab.org> <mokeev at jlab.org>; maxime.defurne at cea.fr
> >> <maxime.defurne at cea.fr> <maxime.defurne at cea.fr>; Ralf Gothe
> >> <rwgothe at gmail.com> <rwgothe at gmail.com>; Dan Carman <carman at jlab.org>
> >> <carman at jlab.org>; clas12_rgk at jlab.org <clas12_rgk at jlab.org>
> >> <clas12_rgk at jlab.org>
> >> *Subject:* [EXTERNAL] Pass1 Data Processing Request for RG-K
> >>
> >> *Message sent from a system outside of UConn.*
> >>
> >>
> >> Dear CLAS Collaborator Chair,
> >>
> >> Dear Members of the CLAS Coordinating Committee,
> >>
> >> please find in attachment the formal request letter for pass1 data
> >> processing of the RG-K data set in parallel with RG-B.
> >>
> >> We are available for any additional information you may need.
> >>
> >> Best regards
> >>
> >> Annalisa D'Angelo
> >>
> >> for the Run Group K
> >>
> >>
> >> --
> >>
> >> ================================================
> >> Prof. Annalisa D'Angelo
> >> Dip. Fisica, Universita' di Roma "Tor Vergata"
> >> Istituto Nazionale di Fisica Nucleare
> >> Sezione di Roma Tor Vergata, Rome Italy
> >> email:annalisa.dangelo at roma2.infn.it
> >> Jefferson Laboratory, Newport News, VA USA
> >> Email: annalisa at jlab.org
> >> Tel: + 39 06 72594562
> >>
> >> --
> >> ================================================
> >> Prof. Annalisa D'Angelo
> >> Dip. Fisica, Universita' di Roma "Tor Vergata"
> >> Istituto Nazionale di Fisica Nucleare
> >> Sezione di Roma Tor Vergata, Rome
> >> Italyemail:annalisa.dangelo at roma2.infn.it
> >> Jefferson Laboratory, Newport News, VA USA
> >> Email: annalisa at jlab.org
> >> Tel: + 39 06 72594562
> >>
> >> _______________________________________________
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> >> clas12_rgk at jlab.org
> >> https://mailman.jlab.org/mailman/listinfo/clas12_rgk
> >>
> >>
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> >>
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> >
>
>
>
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