[g13] g13b data quality: run by run diagnostics

[Nick Zachariou]

That is great Daria. Do you by any chance have the plots of the determined fit parameters as a function of run number? I will look into it more later. Maybe we can talk sometime on skype? Or can you give an update next week during the g13 meeting?

Thank you,
Nick

On Jan 10, 2013, at 4:38 PM, Daria Sokhan <daria at jlab.org> wrote:

> Dear everyone,
> 
> As part of good-run diagnostics I had promised to produce a beam
> asymmetry from the  gamma + d -> p + pi- + (p)  reaction for every run
> in g13b. I have now done that in two ways -- dividing each polarised
> run by the nearest carbon (AMO) data, and also by combining
> neighbouring PARA and PERP data. The results from both methods, along
> with details, can be found on the g13 Wiki:
> 
> http://clasweb.jlab.org/rungroups/g13/wiki/index.php/Raw_asymmetries_by_run_and_polarisation_plane_--_DIAGNOSTICS
> 
> In brief, it looks like there is enough statistics to use this for
> data-quality diagnostics for the lower coherent edge positions (up to
> about 1.9 GeV), but above that the distributions look progressively
> messier as the coherent edge rises higher. I haven't been able to get
> round this yet, but there are some thoughts on the matter on the Wiki.
> At the moment I produced the raw asymmetries without trip cuts,
> without assigning the real polarisation and without cutting around the
> coherent peak. I am just adding those stages and will send an update
> when that's done.
> 
> Cheers,
> Daria
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