[Halld-cal] Newer plots

[wmcginle at andrew.cmu.edu]

Hi all,

Some time ago Alex Somov was simulating a photon gun at different angles
and noticed the bcal cluster energy mean was a function of thrown angle
and Sean made a fix so that the reconstructed cluster energy didn't depend
on the thrown angle. When that happened I changed the mc variation
attenuation lengths from 300 to 310 to set the cluster energy
distributions where we wanted them.  I did not change it in the mc_parms,
sorry about that.

Will

> 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.
> _______________________________________________
> Halld-cal mailing list
> Halld-cal at jlab.org
> https://mailman.jlab.org/mailman/listinfo/halld-cal