Hi Eugene,
During the meeting Doug asked me if I had updated my preliminary
acceptance cuts, since the wire chambers have been moved around... and I
realized I had not thought about that.
This might explain why we see a problem with the vertex distribution (my
polynomial cuts get thrown off by edge effects due to the new acceptance).
I will look into this more carefully...
Adrian
On Wed, 22 Mar 2006, Eugene.Geis@asu.edu wrote:
>
> Any idea what is wrong with right sector protons
> and the vertex distribution (red-prot, green-elec)?
>
> I'm in the process of finalizing a kinematic
> corrections algorithm. It is a 2D X^2 minimization
> where I will reproduce the Beam Energy predicted by
> Monte Carlo. Once the proper momentum and theta agree,
> I will compare the Q^2 calculations from each particle's
> respective momentum and theta and then iterate depending
> on the discrepancy.
> I'm trying to do this with separate combinations of
> adding energy loss and disregarding energy loss. If
> the process works correctly, I assume that the offset
> difference should reproduce the the energy loss
> parameterization.
>
> Next, I'll do a new 2005 GEN analysis with new crunch
> and electron corrections.
>
> -eugene
>
> Quoting Adrian T Sindile <asindile@cisunix.unh.edu>:
>
>> Hi Michael,
>> I looked at the latest recrunch (v3_4_17), here you can find some plots
>>
>> for the offsets (from what I saw, they are consistent with the previous
>>
>> version v3_4_16):
>>
>> http://einstein.unh.edu/~adrian/secondRecrunch/
>>
>> In the last plot there I show the target distribution for left (blue)
>> and
>> right (red) protons and the corresponding electrons in magenta and green
>>
>> (I think this is what you asked for)... All elastic cuts were used for
>>
>> this plot (so only events between -20 and +20 cm target vertex are
>> shown).
>>
>>
>> Just for offset comparison, here are the plots for v3_4_16 presented
>> last
>> week:
>>
>> http://einstein.unh.edu/~adrian/afterRecrunch/
>>
>> and the plots for the really old crunch presented the week before:
>>
>> http://einstein.unh.edu/~adrian/beforeRecrunch/
>>
>> I did not have the four-color target plot for these crunches, but all
>> the other offset plots are there...
>>
>> Adrian
>>
>> On Tue, 21 Mar 2006, Michael Kohl wrote:
>>
>>> Hi,
>>>
>>> we're meeting tomorrow Wed 2006/03/22 at 13:30 at Bates.
>>>
>>> Agenda:
>>>
>>> -Assessment of v3_4_17 recrunch
>>> +hydrogen data: kinematic offsets
>>> +comparison with radiated MC
>>> +variation of wire chamber location, orientation
>>> -Strategy for coming steps / to do list
>>> +recrunch/ preparations, fixes
>>> +energy loss corrections
>>> +residual kinematic corrections
>>> +updates of analyses
>>> -> spin angle, hPz, Pzz
>>>
>>> -Timeline of analysis goals for coming weeks
>>> +Recrunch
>>> +Collaboration meeting on Fri 04/07/2006
>>> (extended analysis meeting on Thu 04/06/2006)
>>> ->define goals of 04/07 meeting
>>> +Conference dates / speakers
>>> +Analysis review meeting early May
>>> ->freeze out version for conferences and first round of papers
>>>
>>> -OAB
>>>
>>>
>>> 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 |
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>>> +-------------------------------------+--------------------------+
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>> --
>>
>> -------------------------------
>> Adrian Sindile
>> Research Assistant
>> Nuclear Physics Group
>> University of New Hampshire
>> phone: (603)862-1217
>> FAX: (603)862-2998
>> email: asindile@unh.edu
>> http://einstein.unh.edu/~adrian/
>>
>>
>
>
>
> --------------------------------------------------------------------------
> Eugene Geis
> PhD Student, Physics Department, ASU
> Research Affiliate, MIT-Bates Laboratory of Nuclear Science
> eugene.geis@asu.edu
> --------------------------------------------------------------------------
> http://quickreaction.blogspot.com
>
--------------------------------- Adrian Sindile Research Assistant Nuclear Physics Group University of New Hampshire phone: (603)862-1217 FAX: (603)862-2998 email: asindile@unh.edu http://einstein.unh.edu/~adrian/
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