Speaker
Dr.
Vladimir Chekelian
(MPI for Physics)
Description
Recent results on deep-inelastic scattering at HERA are
presented. The H1 and ZEUS experiments each have determined new
measurements of the proton longitudinal structure function FL, making
use of the HERA data recorded at reduced centre-of-mass energies. The
results are in agreement with each other and with predictions derived
from QCD fits. The region of high x is explored in a dedicated measurement
by the ZEUS collaboration. All HERA inclusive data
published up to now by H1 and ZEUS are combined, taking into account
the experimental correlations between measurements. As a result, a
combined dataset is obtained. It includes measurements of neutral
current and charged current cross sections recorded at different
centre-of-mass energies, spanning up to six orders of magnitude both
in momentum transfer $Q^2$ and in Bjorken-x. The dataset is superior in
precision compared to the previous HERA data combination which
included a smaller fraction of the total integrated luminosity
collected at HERA. Point-to-point uncorrelated uncertainties better
than 1% are observed in certain kinematic regions.
Primary authors
Karin Daum
(DESY)
Stefan Schmitt
(DESY)
