I've included 7 plots here.
Energy Loss is ON in both: MASCARAD on, and MASC off.
Strict W Cut is now included in ALL histograms except
W.ps
W.ps - is invariant mass plotted on top of one another.
SLIGHT SHIFT... but very small. ~5 MeV.
BeamEnergy_*.ps - Reconstructed Beam Energy from electron
and proton, a strict W Cut is included
for both MASC on and off. Beam Energy
drops ~5 MeV when MASC is on.
Electrons_*.ps - Typical kinematic relations of ep-elastic
Looks bad for lowest Q^2 electrons.
Everything else is relatively flat. MC
would suggest to me to reject electrons
below 26 degrees.
Protons_*.ps - Same Typical kinematic relations of ep-elas
for proton. Not good at all below 36
degrees and above 68 degrees. Also not good
below 320 MeV and above 900 MeV. MonteCarlo
would suggest to me that we should neglect
any events within those ranges, UNLESS elec
kinematics provide the proton information.
New_BeamEnergy.pdf - For the heck of it, the actual data's
reconstruction of the beam energy. Same
color coding as the MC BeamEnergy postscript
I believe I should now generate some Hydrogen Monte Carlo
with NO energy loss to be sure of the results. Dependency
on the discrepancies observed in proton theta will tell us
whether energy loss should be included in
reconstruction (both p and theta dependent), or should be
inserted after (p-dependent discrepancies only).
I think:
If the former situation is the case, energy loss should be
put into Reconstruction and then kinematic corrections
should use the |MASCARAD on/E-Loss off| reconstructed Beam
Energy for the benchmark. If the latter is
true (p-dependent only), then kinematic corrections should
use the |MASCARAD on/E-Loss on| reconstructed Beam Energy
for the benchmark. Energy loss would be implicit in the
kinematic corrections and wouldn't even need implementation.
Replies are expected and more than welcome.
-eugene
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Eugene Geis
PhD Student, Physics Department, ASU
Research Affiliate, MIT-Bates Laboratory of Nuclear Science
eugene.geis@asu.edu
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