[Eg6_analysis] new rtpc bank

[Dupré Raphaël]

Hello,

I would suggest to have 2 or 3 dE/dx in order to test different methods.
Also a p0 can be usefull with the raw momentum for cross check.

Best,

On Fri, Jul 27, 2012 at 7:44 AM, Nathan Baltzell <baltzell at anl.gov> wrote:

> Hi EG6ers,
>
> I'm preparing the reconstructed bank for RTPC as discussed in our
> meetings and here's my thoughts.  Currently I have just minimal
> information for each track:
>
> id1,id2,id3           - 3 hypotheses' pids
> p1,p2,p3              - 3 hypotheses' corrected vertex momenta
> poverq,dedx,theta,phi - drift momentum, dE/dX, and vertex angles
> vx,vy,vz              - vertex position
>
> The selection of these good tracks is based upon cuts, but using the
> the cuts I use to get good calibration tracks may be overly tight:
>
> npads > 3
> fabs(sdist) < 5
> edist > -2  &&  edist < 5
> fabs(doca) < 0.002
> chi2 > 0.3  &&  chi2 < 3
> fabs(zvertex) < 100
>
> Loosening them and including those additional variables in the bank
> may be good:
>
> chi2  - of the helix fit
> doca  - DOCA of the helix to the beamline
> sdist - path length from the first hit to the start of the drift region
> edist - path length from the last  hit to the end   of the drift region
> npads - number of hit pads
>
>
> -Nathan
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-- 
Raphaël Dupré
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