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Overhaul of PID libs

To: Blake Leverington <leverinb@uregina.ca>
Subject: Overhaul of PID libs
From: "Kornicer, Mihajlo" <mikornic@indiana.edu>
Date: Thu, 5 Mar 2009 17:09:22 -0500
Cc: HallD Software Group <halld-offline@jlab.org>, halld-cal@jlab.org
In-Reply-To: <49AEE1B3.109@uregina.ca>
References: <49AEDD62.6020503@uregina.ca> <49AEDFCE.7010005@jlab.org><49AEE1B3.109@uregina.ca>
Reply-To: "Kornicer, Mihajlo" <mikornic@indiana.edu>
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Hi Blake,

in the light of the last week tutorial I updated PID libraries. I guess 
you are the first one to be affected so here are some changes:

TwoGamaFit object has the Lorentz momentum of constrained photons.
To get the mass and momentum of two photons before the fit you can use
getUMass() and getChildMom(i) functions. In addition, photon tags are now
enumerated.

Let me know if anything brakes.

Cheers,
Mihajlo

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