which goes back to the issue raised last week, that you should not use
"tracks" for the veto but only wch hits. There will be always be a
tracking inefficiency and therefore holes in your veto if the analysis
does not ground itself on raw wch hits.
> Vitaliy,
>
> one thing comes to my mind. We increased the low-momentum cutoff to
> 150MeV/c (=proton kinetic energy of 12 MeV). Assuming 50MeV/c tolerance
> to account for resolution effects, means 200 MeV/c (or 21 MeV).
>
> Supposedly a proton track with kinetic energy < 25 MeV is likely not
> assigned to a track, but may still be recognized as a neutron when it
> still fired a neutron counter and no ToF.
>
> Regards,
>
> Michael
>
>
>
> On Tue, 28 Sep 2004, vitaliy ziskin wrote:
>
> > To back up my point. I include a picture of an unpol hydrogen runs
> > normalized to charge. These data sets have different runs in them since
> > no all hydrogen runs have been recrunched. In black is the latest
> > recrunch and in read is the data before the recrunch. Do I need to say
> > anything else. What went wrong?
> >
> >
> > Vitaliy
> >
> >
> > vitaliy ziskin wrote:
> >
> > > Well, for whatever it is worth, the recrunched hydrogen runs show a
> > > huge increase in the "neutron" rate, factor of 2.5 where as neutron
> > > yield increased by about 1.5 probably mostly due to misidentified
> > > "protons". I now even see a nice missing mass peak in the hydrogen
> > > runs. Is it possible that we are no assigning more hits to the
> > > neutron detector than before or not assigning enough to the tofs. Or
> > > maybe bats somehow get in the way. Please... I need your help.
> > > Cheers,
> > > Vitaliy
> > >
> > > Chris Crawford wrote:
> > >
> > >> hi eugene,
> > >> you can always do a joint analysis from dst and raw data. just open
> > >> both filetypes together, and loop through them in sync.
> > >> --chris
> > >>
> > >> Eugene J. Geis wrote:
> > >>
> > >>> lrd is not generating new lr-#### ntuples as well as flr and dst? I
> > >>> notice none
> > >>> in the recrunch directory. Is there potentially a new entry with
> > >>> all wire
> > >>> chamber hits per event regardless of a link to a track? Could be quite
> > >>> important for the neutrons... -eg
> > >>>
> > >>>
> > >>> Quoting Michael Kohl <kohlm@mit.edu>:
> > >>>
> > >>>
> > >>>
> > >>>> Vitaliy,
> > >>>>
> > >>>> Chi mentioned to me that in this BlastLib version the dst header
> > >>>> information is not copied over. Maybe this is related to your
> > >>>> problem?!
> > >>>>
> > >>>> Look at the yields for each spin state separately if your asymmetries
> > >>>> are inconclusive.
> > >>>>
> > >>>> Regards,
> > >>>>
> > >>>> Michael
> > >>>>
> > >>>>
> > >>>> --
> > >>>>
> > >>>> +-------------------------------------+--------------------------+
> > >>>> | Office: | Home: |
> > >>>> |-------------------------------------|--------------------------|
> > >>>> | Dr. Michael Kohl | Michael Kohl |
> > >>>> | Laboratory for Nuclear Science | 5 Ibbetson Street |
> > >>>> | MIT-Bates Linear Accelerator Center | Somerville, MA 02143 |
> > >>>> | Middleton, MA 01949 | U.S.A. |
> > >>>> | U.S.A. | |
> > >>>> | - - - - - - - - - - - - | - - - - - - - - -|
> > >>>> | Email: kohlm@mit.edu | K.Michael.Kohl@gmx.de |
> > >>>> | Work: +1-617-253-9207 | Home: +1-617-629-3147 |
> > >>>> | Fax: +1-617-253-9599 | Mobile: +1-978-580-4190 |
> > >>>> | http://blast.lns.mit.edu | |
> > >>>> +-------------------------------------+--------------------------+
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>
> > >>>
> > >>>
> > >>>
> > >>>
> > >>> --------------------------------------------------------------------------
> > >>>
> > >>> Eugene Geis
> > >>> PhD Student, Physics Department, ASU
> > >>> Research Affiliate, MIT-Bates Laboratory of Nuclear Science
> > >>> eugene.geis@asu.edu
> > >>> --------------------------------------------------------------------------
> > >>>
> > >>> -------------------------------water is
> > >>> good------------------------------
> > >>> --------------------------------------------------------------------------
> > >>>
> > >>> ** Check Out the Phatty Acidz @ http://www.phattyacidz.com **
> > >>>
> > >>>
> >
> >
>
>
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