[G12] Proton, Electron, Positron, Photon acceptance

[Michael C. Kunkel]

On 7/31/12 4:37 PM, Hicks, Kenneth wrote:
> MK,
>
> Why do you have a dip in the middle of each sector for the plot labeled "phi of e+" on page 1?  (Similar for the e- on page 2).  This doesn't look correct.  What happens if you don't do the preliminary cut on leptons?
>
> Ken
>
>
> -----Original Message-----
> From: g12-bounces at jlab.org [mailto:g12-bounces at jlab.org] On Behalf Of Michael C. Kunkel
> Sent: Tuesday, July 31, 2012 4:12 PM
> To: g12
> Subject: [G12] Proton, Electron, Positron, Photon acceptance
>
> Greetings G12,
>
> I seem to having issues with my acceptance and would appreciate comments.
> Please refer to the link
> http://clasweb.jlab.org/rungroups/g12/wiki/index.php/PEpEmGamPhase_Acceptance#Tuesday_July_31.2C_2012
> where I have plots showing acceptance plots. The issue I am having is in the proton and beam acceptance, which does not match the data, however the e+e-gamma acceptance does.
>
> I generate my beam spectrum with a 1/e function and before I send into gsim I do a preliminary cut on the leptons/photons to be kinematic angles of the EC/CC. This cut is what distorts my proton, beam and t spectrum.
>
> Any thoughts on why?
>
> Thanks
> MK
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Greetings Ken,

This dip in the middle for the leptons in a property of the physical 
structure of the CC. The CC is split by 2 hyperbolic mirrors, centered 
in phi.


MK