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CUHEP- Beamstrahlung and Two-Photon Process Separation
CU Group Work
Beamstrahlung and Two-Photon Process Study
Our group at CU has carried out a very detailed
study showing the resolution of the energy deposition separation in the
BeamCal between the high energy electron/positron of a Two Photon process
and the Intense Beamstrahlung background present in the International
Linear Collider. The BeamCal is an electromagnetic calorimeter in the very
forward region of the interaction region.
Our group, Gleb Oleinik, Jack Gill, has for two
years carried out a major simulation effort overlaying the showers of
the intense beamstrahlung reaching the BeamCal and the shower from the
high energy electron/positron froma two photon process. The two photon
process is a major possible background for some Supersymmetric signals.
We show the detector energy resolution with which we can observe the Two
Photon signal. The work is shown here in
ps format .
In the process of the energy resolution analysis
we realized that we can get a higher detection efficiency as compared to a
good energy resolution if we only look at the energy deposition in the back
of the BeamCal; namely we compare the beamstrahlung energy deposition to
that of the electron from the two photon process behind the first 3 cms of
the BeamCal. This analysis is shown here
in ps format .
In 2010 this work has been upgraded. The new
result is shown in ps format.