[Hps-analysis] Beam direction from 3 prong events

[Rafayel Paremuzyan]

Hi all,

As a follow-up to the analysis meeting on Friday.

I found a mistake in my code, and as a result beam four momentum of the 
beam was reconstructed wrongly.
So now everything seems ok. Below shown reconstructed beam vertical 
angle versus horizontal angle
The right figure is the projection of 2D histogram on "Y" axis which is 
the vertical angle.
The mean value of it is -0.7 mrad, which is about the same value that 
was obtained before by Sho and Sbouh.

So sorry for the fake alarm

Rafo


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