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The MSHT20 Parton Distribution Functions

by R.S. Thorne, S. Bailey, T. Cridge, L. Harland-Lang and A.D. Martin

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Submission summary

Authors (as Contributors): Robert Thorne
Submission information
Preprint link: scipost_202107_00066v1
Date submitted: 2021-07-27 17:58
Submitted by: Thorne, Robert
Submitted to: SciPost Physics Proceedings
Proceedings issue: DIS2021
Ontological classification
Academic field: Physics
  • High-Energy Physics - Phenomenology
Approach: Phenomenological


We present the new MSHT20 set of parton distribution functions (PDFs) of the proton, determined from a global analysis of the available hard scattering data and superseding the MMHT14 sets. The parameterisation is now adapted and extended and we include a large number of new data sets: the final HERA and Tevatron data, and a significant number of LHC data sets on vector boson production, inclusive jets and top quark distributions. We include up to NNLO QCD corrections for all data sets that play a major role in the fit. There are some changes to central PDF values and a significant reduction in the uncertainties, but the PDFs and the predictions using them are generally within one standard deviation of the MMHT14 results. We discuss the phenomenological impact of our results.

Current status:
Has been resubmitted

Submission & Refereeing History

Resubmission scipost_202107_00066v2 on 18 February 2022

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Submission scipost_202107_00066v1 on 27 July 2021

Reports on this Submission

Anonymous Report 1 on 2022-2-10 (Invited Report)


A very result heavy proceeding. Recommend for acceptance. Looking forward to the theoretical uncertainties associated with the framework.

Minor corrections:
Figure 2, please specify the left plot is for d_v and the right for u_v
Figure 3, please specify the left plot is for g and the right for u
Figure 8, please specify the left and right plot. Also the Y axis need to be slightly modified to avoid confusion. Suggestion, use brackets to separate numerator and denominator.
Page 3 line 11, correct "))"->")"
Title in Sec.3, "New Data sets" -> "New Data Sets"

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