[Clas12_verystrange] PAC40 comments response, please read
Eugene Pasyuk
pasyuk at jlab.org
Wed Jun 12 10:18:38 EDT 2013
I think response to question 7 could be changed a bit.
7. Forward tagger: how are the crystals read out in this high rate
environment ? Are they operated at room temperature ?
Crystals are read out by APDs. The calorimeter is very similar to the Inner Calorimeter used in CLAS for DVCS experiment. The beam test of FT prototype has shown that it could operate at the temperature slightly below room temperature and does not need substantial cooling.
-Eugene
----- Original Message -----
> From: "Igor Strakovsky" <igor at va.gwu.edu>
> To: "clas12 verystrange" <clas12_verystrange at jlab.org>
> Sent: Wednesday, June 12, 2013 10:06:27 AM
> Subject: Re: [Clas12_verystrange] PAC40 comments response, please read
>
> you are welcome, Mike
>
> On Wed, 12 Jun 2013 10:03:00 -0400 (EDT), Michael Dugger
> <dugger at jlab.org>
> wrote:
>
> >
> > Thanks :)
> >
> > -Michael
> >
> > On Wed, 12 Jun 2013, Igor Strakovsky wrote:
> >
> >> Mike,
> >>
> >> That is the theoretical plot and I sent Vitali's clarification to
> >> Lei
> >> and Eugene
> >>
> >> Here you are...
> >>
> >> The Dalitz plot is constructed in terms of (K+ \Omega) vs (K0
> >> \Omega )
> >> variables. However the amplitude (see Fig.10) is not symmetric
> >> relative
> >> to the permutation of the K0 and K+ final states due to isospin
> >> and
> >> charge conservation. Therefore the resonance contribution is only
> >> seen
> >> in one band. For a fully symmetric amplitude one could expect
> >> two-band
> >> structure as shown in Fig.13. Such a symmetric amplitude should
> >> include
> >> isospin 3/2 \Sigma resonances in the intermediate state. Hence
> >> the
> >> Dalitz plot might be very useful to disentangle various
> >> production
> >> mechanism and to understand the reaction dynamics.
> >>
> >> Note the reaction mechanism can be more complicated then depicted
> >> in
> >> Fig.10. More realistic calculation should also take the CLAS
> >> acceptance in to account.
> >>
> >> On Wed, 12 Jun 2013 09:52:24 -0400 (EDT), Michael Dugger
> >> <dugger at jlab.org>
> >> wrote:
> >>
> >>>
> >>> Igor,
> >>>
> >>> On page 25 of the proposal there is Fig. 12 that shows "phase
> >>> space only"
> >>> distributions and Fig. 13 that shows the "fully symmetric"
> >>> reaction. The
> >>> right panel of Fig. 12 has a vertical band at about 5.5 that is
> >>> also seen
> >>> in Fig. 13. The vertical band for Fig. 12 does not extend as much
> >>> as for
> >>> Fig. 13.
> >>>
> >>> We tried to understand the distributions during the meeting
> >>> yesterday but
> >>> we did not find the definition of "p_b" in the proposal.
> >>>
> >>> Also, I do not know what "fully symmetric" means.
> >>>
> >>> In short, we do not understand the figures because we don't know
> >>> what p_b
> >>> is, and that means we don't know how to reply to the comment.
> >>>
> >>> We just need a bit of clarification.
> >>>
> >>> Take care,
> >>> Michael
> >>>
> >>> On Wed, 12 Jun 2013, Igor Strakovsky wrote:
> >>>
> >>>> Me too and I do not know what Lei is asking me for
> >>>>
> >>>> On Wed, 12 Jun 2013 09:29:00 -0400 (EDT), Michael Dugger
> >>>> <dugger at jlab.org>
> >>>> wrote:
> >>>>
> >>>>>
> >>>>> Hi,
> >>>>>
> >>>>> The response to 9 and 10 seem OK to me.
> >>>>>
> >>>>> Take care,
> >>>>> Michael
> >>>>>
> >>>>> On Tue, 11 Jun 2013, Lei Guo wrote:
> >>>>>
> >>>>>> Hi, All,
> >>>>>>
> >>>>>> I compiled a response to PAC40 comments. Please check and let
> >>>>>> me know
> >>>>>> if you think it should be modified.
> >>>>>> Under svn, please check out PAC40Comment.pdf or
> >>>>>> PAC40Comment.docx
> >>>>>>
> >>>>>> Specifically, we are missing an answer to question 6, which
> >>>>>> Igor
> >>>>>> promised that he will do it tonight.
> >>>>>> Also, I felt the answer to question 9 and10 might not be
> >>>>>> adequate.
> >>>>>> Maybe Mike can take a look at it?
> >>>>>>
> >>>>>> Cheers!
> >>>>>>
> >>>>>> Lei
> >>>>>> **************************************
> >>>>>> @
> >>>>>> / *
> >>>>>> / ___ ___ Lei Guo _______________________
> >>>>>> L_O_/ ____ Florida International University____/_/
> >>>>>> \ | Physics Dept., CP
> >>>>>> 212 / /
> >>>>>> / \ | Miami, FL
> >>>>>> 33199 / / /
> >>>>>> / I_/ \ ____ USA _____ /______/__________/ /
> >>>>>> / /
> >>>>>> L
> >>>>>> / / /
> >>>>>> /
> >>>>>> /
> >>>>>> / / / / /
> >>>>>> / /
> >>>>>> /_/__________/______/______/__________/_/
> >>>>>> /_/__________/______/______/__________/_/
> >>>>>> 305-348-0234(o)
> >>>>>>
> >>>>>> **************************************
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> _______________________________________________
> >>>>>> Clas12_verystrange mailing list
> >>>>>> Clas12_verystrange at jlab.org
> >>>>>> https://mailman.jlab.org/mailman/listinfo/clas12_verystrange
> >>>>>>
> >>>>> _______________________________________________
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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
> >>>>
> >>
> >> 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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> > https://mailman.jlab.org/mailman/listinfo/clas12_verystrange
>
> 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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