MSHT20 PDFs: LHAPDF grids
Here we enclose the LHAPDF 6 grid files corresponding to the MSHT20 PDFs, published in arXiv:2012.04684.
Please reference this paper if you use the PDFs for a publication.
We provide NLO and NNLO grids for the central fit and 64 eigenvectors sets (corresponding to 32 eigenvectors in the '+' and '-' directions), for a 68% confidence interval. LO grids are provided with 60 eigenvector sets. Grids for the central fit + eigenvectors are provided for αS=0.130 at LO, αS=0.118 and 0.120 at NLO and αS=0.118 at NNLO.
Note a formatting issue lead to the αS grid for LHAPDF interpolation being incorrect in version 1 of all grids. This has now been fixed in version 2 onwards.
Central + eigenvector sets
MSHT20nnlo_as118     MSHT20nlo_as118     MSHT20nlo_as120     MSHT20lo_as130
In addition, alongside the MSHT20 paper we provided central grids for a short ranges of αS values at NLO and NNLO. At NLO αS=0.115-0.122 and at NNLO αS=0.115-0.121, in increments of 0.001. Again for these a formatting issue lead to the αS grid for LHAPDF interpolation being incorrect in version 1 of all grids. This has now been fixed in version 2 onwards.Following our paper on the αS and heavy quark mass dependence, published in arXiv:2106.10289, we also provide further LHAPDF 6 grids corresponding to these variations as well as some cases with 3 and 4 flavours only, if you use any of these please reference this paper (as well as the original MSHT20 paper).
Central sets for small αS ranges
MSHT20nnlo_as_smallrange     MSHT20nlo_as_smallrange     MSHT20nnlo_as_smallrange_nf3     MSHT20nlo_as_smallrange_nf3     MSHT20nnlo_as_smallrange_nf4     MSHT20nlo_as_smallrange_nf4
Central sets for large αS ranges
Central sets for mc,b ranges
MSHT20nnlo_mcrange_nf3     MSHT20nnlo_mcrange_nf4     MSHT20nnlo_mcrange_nf5     MSHT20nnlo_mbrange_nf3     MSHT20nnlo_mbrange_nf4     MSHT20nnlo_mbrange_nf5     MSHT20nlo_mcrange_nf3     MSHT20nlo_mcrange_nf4     MSHT20nlo_mcrange_nf5     MSHT20nlo_mbrange_nf3     MSHT20nlo_mbrange_nf4     MSHT20nlo_mbrange_nf5     MSHT20nlo_as120_mcrange_nf3     MSHT20nlo_as120_mcrange_nf4     MSHT20nlo_as120_mcrange_nf5     MSHT20nlo_as120_mbrange_nf3     MSHT20nlo_as120_mbrange_nf4     MSHT20nlo_as120_mbrange_nf5