Hello:
I have some questions regarding the class TBLRecon, for anyone who happens
to know.
1) There are multiple member functions of this class that perform fits of
the data (e.g. WCfit1, WCfit2, and WCminuitDit). Which one is "the best"?
2) To identify a scattered electron, you need six pieces of info: three
vertex coordinates (x0, y0, z0) as well as the three spherical coordinates
of that electron's initial momentum vector (p, theta, phi). When you
reconstruct the electron's path, it is only possible to determine p,
theta, and phi. information regarding x0 and y0 is gone due to the fact
that the target has a nonzero rho value. however, it is still possible to
detemine a corrected zc value. My question is: is this zc value as
determined by the TBLRecon class the z coordinate of the point of closest
approach to the z-axis of the reconstructed track? Or is there some other
definition being used in the class. I tried to look at the actual code,
but it's hard to decipher due to a lack of comments and the fact that i'm
not sure what exact calculations were done, anyway.
Thank you,
Aaron
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