[Frost] More on the vertex

[Brian Morrison]

Hey all,

Michael asked me to do a quick study into the vertex dependency in another
situation where we can also look at the pi+ and pi-'s.  I ran over running
period 4 using the attached code strictly enforcing good events to be such
that I detect all three particles (pi+, pi-, and a proton) and then filled
the histograms from the MVRT bank and fit them using Michael's function. 
Since there are nearly 30 plots I'll just attach the output root file
(also, I have a flight to catch shortly and no time to upload all of the
images).  Any comments or questions on this I'll try to answer over the
weekend as I can but most likely I'll get to them on Tuesday.

*note: The fit Michael gave me to use is within the code that is attached.
*note: Connotation is pip = pi+, pim = pi-, pro = proton

-Brian
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