[Halld-physics] Polarization values

[Alexander Somov]

Hello Richard,

I don't believe that we have real 'artifacts' in the PS
spectrum after we integrate over the production angle
(phi). I would say that the polarization may impact the
PS energy resolution.

Cheers,
       Sasha

P.S. We still don't know how well TAGH counters are
aligned (the same for PS)




On Tue, 19 Sep 2017, Richard Jones wrote:

> Mike,
>
> These are very nice results, good to see that the spread between the
> different polarization orientations is now much less than we were seeing
> before, esp. 2017.
>
> One question about the energy scale. Are you using the tagger energy to
> decide which bin each event should go into? Now that we know the PS energy
> is entangled with the polarization, to produce a spectrum free of artifacts
> we should only be using the tagger energy to make this spectrum.
>
> -Richard
>
> On Tue, Sep 19, 2017 at 10:08 AM, Michael Dugger <dugger at jlab.org> wrote:
>
>>
>> Hi,
>>
>> I have code that creates the polarizations for
>> Spring 16 (priority set 1) and Spring 17 data
>> at
>>
>> https://userweb.jlab.org/~dugger/triPol/makePolValsV2.tar
>>
>> Once you have un-tarred the file, go through the steps in
>> the README file to generate the polarizations.
>>
>> Take care,
>> Michael
>>
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>