PDF4LHC

PDF4LHC PDFs: LHAPDF grids

Here we enclose the LHAPDF 6 grid files corresponding to the PDF4LHC21 PDFs, published in arXiv:2203.05506.

Please reference the paper if you use the PDFs for a publication.

We provide NNLO grids for the 900 replicas for the baseline set of Monte Carlo replica sets. We also provide a compressed Monte Carlo set with 100 replicas, 40 eigenvectors for a Hessian set where postive definitive PDFs have been imposed at high x, and 40 eigenvectors for a Hessian set where this condition is not imposed. α_S=0.118 for the PDFs. Each version is provided with a maximum of five (default) or four active quark flavours, and also in a version with an additional two central sets at α_S=0.117 and 0.119 to enable the calculation of the PDF + α_S uncertainty.

900 Baseline sets

•   PDF4LHC21 baseline  

100 Compressed Monte Carlo replica sets

•   PDF4LHC21_mc  
•   PDF4LHC21_mc_nf4 
•   PDF4LHC21_mc_pdfas  
•   PDF4LHC21_mc_pdfas_nf4 

40 Hessian sets

•   PDF4LHC21_40  
•   PDF4LHC21_40_nf4 
•   PDF4LHC21_40_pdfas  
•   PDF4LHC21_40_pdfas_nf4 

40 Hessian sets - not positive definite

•   PDF4LHC21_40_nopos  
•   PDF4LHC21_40_nopos_nf4 
•   PDF4LHC21_40_nopos_pdfas  
•   PDF4LHC21_40_nopos_pdfas_nf4