Speaker
Katarzyna Wichmann
(DESY)
Description
New combined H1 and ZEUS data on neutral and charged current inclusive
cross sections at HERA from all running periods 1994-2007, are used as
the sole input to NLO and NNLO QCD analyses to determine new sets of
parton distributions, HERAPDF2.0, with small experimental uncertainties
and an estimate of model and parametrisation uncertainties. Charm and
jet production data are also included in the fit to improve, in
particular, the determination of the gluon density and the strong
coupling, \alpha_s. A HERAPDF fit, evolved in leading order (LO) in
alpha_s using the DGLAP evolution equations, is also presented. The LO
PDF is particularly useful for Monte Carlo event generators based on LO
matrix elements plus parton showers.
Primary authors
Matthew Wing
(UCL)
Stefan Schmitt
(DESY)
