DOI 10.1007/s100529900280
Measurement of high-Q2 charged-current e+p deep inelastic scattering cross sections at HERA
The ZEUS Collaboration
J. Breitweg - et al.
Argonne National Laboratory, Argonne, IL, USA
Received: 7 July 1999 / Published online: 21 December 1999
Abstract
The e+p charged-current deep inelastic scattering cross sections,
for Q2 between 200 and 60000 GeV2, and
and
for Q2 > 200 GeV2, have been measured
with the ZEUS detector at HERA.
A data sample of 47.7 pb-1, collected at a center-of-mass energy of 300 GeV,
has been used. The double-differential cross-section
falls
by a factor of about 50000 as Q2 increases from 280 to 30000 GeV2.
The double differential cross section
has also been
measured.
A comparison between the data and Standard Model (SM) predictions shows that
contributions from antiquarks (
and
)
and
quarks (d and s) are both required by the data.
The predictions of the SM give a good description of the full body of the
data presented here.
A comparison of the charged-current cross-section
with
the recent ZEUS results for neutral-current scattering shows that
the weak and electromagnetic forces have similar strengths for Q2above
M2W, M2Z.
A fit to the data for
with the Fermi constant GF and MWas free parameters yields
and
.
Results for MW, where the propagator effect alone or the SM constraint
between GF and MW have been considered, are also presented.
Copyright Springer-Verlag 2000