Eur. Phys. J. C 10, 395-403
DOI 10.1007/s100529900114
Extraction of parton distributions and 
from DIS data
within a Bayesian treatment of systematic errors
S.I. Alekhin
Institute for High Energy Physics, 142284 Protvino, Russia (e-mail: alekhin@mx.ihep.su)
Received: 5 May 1997 / Revised version: 12 October 1998 / Published online: 8 September 1999
Abstract
We have performed a NLO QCD global fit of BCDMS, NMC, H1 and
ZEUS data
with full account of point-to-point correlations
using the Bayesian approach to the treatment of systematic errors.
Parton distributions in the proton with their experimental uncertainties,
including both statistical and systematic, are obtained.
The gluon distribution in a wide region of x
is found to be softer than the gluon
distribution extracted in standard global analyses which include
prompt
photon data. We obtain a
robust estimate of
C.L.)
based on Chebyshev's inequality, which
is compatible with an earlier determination
of from the DIS data, but is less dependent
on high-twist effects.
Copyright Springer-Verlag
