[Frost] More on missing mass of pion

[dugger at jlab.org]

Hideko,

My suggestion regarding the missing mass for pi0 as a function of z-vertex
might not work very well. I forgot that the resolution of the vertex gets
worse as the angles get smaller. Even if the resolution stayed constant,
the dependence of missing mass on z-vertex would probably be hard to see
using my suggestion.

I did not want you to waste much time thinking about a questionable
suggestion.

Take care,
Michael