The European Physical Journal C· 2015Q1
Parton distributions in the LHC era: MMHT 2014 PDFs
- 1,282citations
- Q1SCImago
- 2015year
Short summary
The MMHT2014 Parton Distribution Functions (PDFs) offer updated proton structure information, incorporating new LHC, Tevatron, and HERA data, and improved theoretical framework, superseding previous MSTW2008 sets.
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Key points
- Presents LO, NLO, and NNLO sets of MMHT2014 proton PDFs, superseding MSTW2008.
- Incorporates new data from LHC, updated Tevatron, and HERA experiments.
- Features an improved theoretical framework compared to previous analyses.
- Highlights changes in the down-up valence quark difference and strange quark PDF.
AI-generated from the title and abstract; the full text is not read.
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 [Formula: see text] valence quark difference at small [Formula: see text] 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 [Formula: see text] 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.
The authors' abstract, as published at the source. The European Physical Journal C, 2015 · DOI ↗
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Field: Nuclear and High Energy Physics
Nuclear and High Energy PhysicsPhysics and Astronomy