[Eg6_analysis] rtpc vertex/angle study

[Dupré Raphaël]

Hello Nathan,

Did you check if this problem was there before the last cooking?

To me it looks like a reconstruction problem, we might want to check
in the GEM package how exactly the variable is produced. It would be
good to get the correction at this level don't you think so?

Anyway it is very interesting, we will obtain a much better vertex
after correction!

Best,

On Wed, Aug 7, 2013 at 6:30 PM, Nathan Baltzell <baltzell at anl.gov> wrote:
> Hello EG6ers,
>
> I noticed an effect in the RTPC in pass1v1 data: an error on the z-vertex
> that depends on theta.  It might originate from an error on theta.  If so,
> there could be a significant correction for tracks far from 90deg.
> Here's a little study:
>
> https://clasweb.jlab.org/rungroups/lowq/wiki/index.php/RTPC_Vertex_and_Angle_(Aug_7,_2013)
>
> Regards,
> Nathan
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-- 
Raphaël Dupré