The impact of the final HERA combined data on PDFs obtained from a global fit

Harland-Lang, L.A.; Martin, A.D.; Motylinski, P.; Thorne, R.S.

doi:10.1140/epjc/s10052-016-4020-1

The impact of the final HERA combined data on PDFs obtained from a global fit

Harland-Lang, L.A.; Martin, A.D.; Motylinski, P.; Thorne, R.S.

Authors

L.A. Harland-Lang

A.D. Martin

P. Motylinski

R.S. Thorne

Abstract

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 χ2χ2 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 Q2minQmin2 . This can be improved by phenomenologically motived corrections to FL(x,Q2)FL(x,Q2) which parametrically are largely in the form of higher-twist type contributions.

Citation

Harland-Lang, L., Martin, A., Motylinski, P., & Thorne, R. (2016). The impact of the final HERA combined data on PDFs obtained from a global fit. The European Physical Journal C, 76(4), Article 186. https://doi.org/10.1140/epjc/s10052-016-4020-1

Journal Article Type	Article
Acceptance Date	Mar 11, 2016
Online Publication Date	Apr 6, 2016
Publication Date	Apr 6, 2016
Deposit Date	May 25, 2017
Publicly Available Date	May 31, 2017
Journal	European Physical Journal C: Particles and Fields
Print ISSN	1434-6044
Electronic ISSN	1434-6052
Publisher	SpringerOpen
Peer Reviewed	Peer Reviewed
Volume	76
Issue	4
Article Number	186
DOI	https://doi.org/10.1140/epjc/s10052-016-4020-1

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© The Author(s) 2016 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Funded by SCOAP3.