[Halld-cal] Newer plots

[Sean Dobbs]

Hi all,

I've analyzed some bggen data I made for a different study, and found
similar results to Tegan's [see attached BCAL_inv_mass-mc-cluster.pdf  and
 BCAL_inv_mass-mc-shower.pdf].  An un-expert look at the reconstruction
code suggests that the attenuation lengths are used in the energy
reconstruction and these are indeed different for data and MC.

There might be a mismatch in the values of the attenuation lengths used in
the simulation, and reconstruction, though.  When I look at BCAL/mc_parms,
I find the parameter ATTEN_LENGTH = 300.  When I look at the mc variation
of BCAL/attenuation_parameters, I find the lengths for each channel are set
to 310.  Probably these should be set to the same value?

Another discrepancy I noticed was that the efficiency in each layer
calculated with Elton's BCAL_Eff plugin was different for MC and data.  For
example:
- Data Run 2931 - bcal_hist_eff-run3185.png
- MC - bcal_hist_eff-mc.png
I'm not sure if the smaller efficiency in MC is related to problems
reconstructing certain BCAL points, or other issues with the clusterizer..

Cheers,
Sean

On Thu, Jun 4, 2015 at 2:47 PM beattite <beattite at uregina.ca> wrote:

> Hello.
>
> Here are the mcsmear comparison plots using the variation=mc variable.
> There are two files.  One is the mass spectra using cluster energies,
> the other is using shower energies.
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