https://doi.org/10.1140/epjc/s10052-016-4020-1
Regular Article - Theoretical Physics
The impact of the final HERA combined data on PDFs obtained from a global fit
1
Department of Physics and Astronomy, University College London, London, WC1E 6BT, UK
2
Institute for Particle Physics Phenomenology, Durham University, Durham, DH1 3LE, UK
* e-mail: thorne@hep.ucl.ac.uk
Received:
29
January
2016
Accepted:
11
March
2016
Published online:
6
April
2016
We investigate the effect of including the HERA run I + II combined cross section data on the MMHT2014 PDFs. We present the fit quality within the context of the global fit and when only the HERA data are included. We examine the changes in both the central values and the uncertainties in the PDFs. We find that the prediction for the data is good, and only relatively small improvements in 
and changes in the PDFs are obtained with a refit at both NLO and NNLO. PDF uncertainties are slightly reduced. There is a small dependence of the fit quality on the value of 
. This can be improved by phenomenologically motived corrections to 
which parametrically are largely in the form of higher-twist type contributions.
© The Author(s), 2016
