Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue Date:
2018
Abstract(summary):
Abstract
The GEp-III and GEp-2
γ
experiments, carried out in Jefferson Lab’s Hall C from 2007–2008, consisted of measurements of polarization transfer in elastic electron–proton scattering at momentum transfers of
Q
2
=
2
.
5
,
5
.
2
,
6
.
8
,
and 8.54 GeV
2
. These measurements were carried out to improve knowledge of the proton electromagnetic form factor ratio
R
=
μ
p
G
E
p
∕
G
M
p at large values of
Q
2
and to search for effects beyond the Born approximation in polarization transfer observables at
Q
2
=
2
.
5
GeV
2
. The final results of both experiments were reported in a recent archival publication. A full reanalysis of the data from both experiments was carried out in order to reduce the systematic and, for the GEp-2
γ
experiment, statistical uncertainties. This technical note provides additional details of the final analysis omitted from the main publication, including the final evaluation of the systematic uncertainties.
Page:
54-54
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