Parton distributions in the LHC era: MMHT 2014 PDFs

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

Abstract

We present LO, NLO and NNLO sets of parton distribution functions (PDFs) of the proton determined from global analyses of the available hard scattering data. These MMHT2014 PDFs supersede the ‘MSTW2008’ parton sets, but they are obtained within the same basic framework. We include a variety of new data sets, from the LHC, updated Tevatron data and the HERA combined H1 and ZEUS data on the total and charm structure functions. We also improve the theoretical framework of the previous analysis. These new PDFs are compared to the ‘MSTW2008’ parton sets. In most cases the PDFs, and the predictions, are within one standard deviation of those of MSTW2008. The major changes are the u−du−d valence quark difference at small xx due to an improved parameterisation and, to a lesser extent, the strange quark PDF due to the effect of certain LHC data and a better treatment of the D→μD→μ branching ratio. We compare our MMHT PDF sets with those of other collaborations; in particular with the NNPDF3.0 sets, which are contemporary with the present analysis.

Citation

Harland-Lang, L., Martin, A., Motylinski, P., & Thorne, R. (2015). Parton distributions in the LHC era: MMHT 2014 PDFs. The European Physical Journal C, 75(5), Article 204. https://doi.org/10.1140/epjc/s10052-015-3397-6

• Journal Article Type: Article
• Acceptance Date: Apr 8, 2015
• Online Publication Date: May 9, 2015
• Publication Date: May 9, 2015
• 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: 75
• Issue: 5
• Article Number: 204
• DOI: https://doi.org/10.1140/epjc/s10052-015-3397-6
• Public URL: https://durham-repository.worktribe.com/output/1386222