[Halld-cpp] [New Logentry] E/p vs mass of charged track pairs

[aaustreg at jlab.org]

Logentry Text:
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By plotting the invariant mass of the system versus the E/p for the negatively charged track in the FCal, we can demonstrate that the enhancement at low masses is a result of electron/positron pairs, presumably produced by the BH process (run 100745).
[figure:1]

For the runs with a lower trigger rate, this contribution was almost completely suppressed (run 100720):
[figure:2]



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