The QCD Quark Propagator in Coulomb Gauge and - Institut für Physik

78 6.5. Nucleon electromagnetic form factors: results
1
G E
p
0.8
0.6
0.4
fit F.W.
set A ; µ 1
=2
set A ; µ 1
=1
set A ; µ 1
=3
set B ; µ 1
=2
set B ; µ 1
=1
set B ; µ 1
=3
G M
p
4
3
2
0.2
1
0
0 1 2 3 4 5 6
Q 2 [GeV 2 ]
0
0 1 2 3 4 5 6
Q 2 [GeV 2 ]
0.06
0.0
-0.5
0.04
-1.0
G E
n
G M
n
0.02
-1.5
-2.0
0
0 1 2 3 4 5 6
Q 2 [GeV 2 ]
0 1 2 3 4 5 6
Q 2 [GeV 2 ]
Figure 6.2: Response of nucleon form factors to variations in the magnetic moment of the
axial-vector diquark, cf. [AHK + 05]: µ 1 + = 1, 2, 3; with χ 1 + = 1, κ T = 2. The legend in
the top-left panel applies to all; the dashed-line marked by “∗” is a fit to experimental data
[FW03] and the dashed-line marked by “+” in the lower-left panel is the fit to G n E (Q2 ) of
reference[G + 71]; and the horizontal lines in the right panels mark the experimental value of
the nucleon’s magnetic moment.