This thesis is based on the analysis of charged current processes in
positron-proton scattering at HERA. The data were taken in 1999 and 2000
at a centre-of-mass energy s1/2=320 GeV and correspond
to an integrated luminosity of L=65,25 pb-1.
The total (σCCtot), single differential
(dσ/dQ2 and dσ/dx) and double differential
(d2σ/dxdQ2) cross sections for charged current processes are
measured in the range of four--momentum transfer squared, Q2, greater
than 200 GeV2, and inelasticity y between 0,03 and 0,85.
In the measurement the background caused by photoproduction is reduced
by the use of neural networks. The hadronic energy scale is calibrated by
using neutral current events. To increase the statistical
precision of the measurement the cross sections are combined with previous
ones, measured with $e^{+}p$ data taken in 1994 to 1997 at
a centre--of--mass energy s1/2=300 GeV. The measured
cross sections are compared to the Standard Model predictions. The
measurement are found to be fully consistent with the theoretical prediction.
In addition the measured cross section are compared to the results of
the analysis of e+p-data taken in 1998 and 1999. The helicity
dependence of the double differential cross section and the influence of
the different parton densities on the cross section are analysed. The
comparison of the charged current single differential cross dσ/dQ2
with the neutral current one, shows the unification of the weak and
electromagnetic force at high Q2.
Kurzfassung
Gegenstand dieser Arbeit ist die Untersuchung von Wirkungsquerschnitten des
geladenen Stroms in der Positron-Proton Streuung
( e+ + p -> νe + X ) bei HERA. Die
zugrundeliegenden e+p-Daten wurden mit dem H1-Detektor in den
Jahren 1999 und 2000 bei einer Schwerpunktsenergie von
s1/2=320 GeV aufgezeichnet und entsprechen einer
integrierten Luminosität von L=65,25 pb-1.
Im kinematischen Bereich Q2 > 200 GeV2 und 0,03