[d2n-analysis-talk] Positron dilution

[Matthew R. Posik]

On Wed, Apr 20, 2011 at 7:52 PM, David Flay <flay at jlab.org> wrote:

>
>
> On Wed, Apr 20, 2011 at 7:34 PM, <posik at jlab.org> wrote:
>
>>
>>  I am uncertain what dilution factor should be included in the
>> asymmetries? Or if there is another way to go about getting the positron
>> contamination?
>>
>
> What about calculating a positron asymmetry?  In general, couldn't you
> have:
>
> A_tot = A_e(-) + A_e(+)
>

Yes, I am going to get the asymmetry. The problem with this method is that
we only too BB positive polarity data at target spin =270 and nothing else.
And at this setting we only have roughly 12 runs.

>
> where A_tot = total electron asymmetry with some contamination, A_e(-) =
> electron asymmetry, A_e(+)  = positron asymmetry.
>
> I would think that calculating A_e(+) != 0 would indicate some level of
> contamination that could be subtracted off from your current electron
> asymmetry.
>
>
> --
> -----------------------------------------------------------
> David Flay
> Physics Department
> Temple University
> Philadelphia, PA 19122
>
> office: Barton Hall, BA319
> phone: (215) 204-1331
>
> e-mail: flay at jlab.org
>            flay at temple.edu
>
> website: http://www.jlab.org/~flay
>              http://quarks.temple.edu
> -----------------------------------------------------------
>
>
>


-- 
Matthew Posik
Email: posik at temple.edu
Temple University Physics Dept.
Office: BA-319
Office #:  215-204-1331
WebSites:
Temple:
http://quarks.temple.edu/
d2n:
http://hallaweb.jlab.org/experiment/E06-014/
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