PDFLIB v8.04 most utilized PDFCODEs for D0 MC (also valid for PDFLIB v7.09) PDF Name | PDFCODE | Comments -----------|-----------|---------- CTEQ4L | 4032 | LO, current default CTEQ4M | 4034 | NLL MSbar CTEQ4HJ | 4040 | NLL MSbar CTEQ4HQ | 4042 | NLL MSbar CTEQ5L | 4046 | LO, next default CTEQ5M | 4048 | NLL MSbar CTEQ5HJ | 4049 | NLL MSbar CTEQ5HQ | 4050 | NLL MSbar CTEQ5M1 | 4053 | NLL MSbar (improved) CTEQ5HQ1 | 4054 | NLL MSbar (improved) GRV94LO | 5005 | LO GRV94HO | 5006 | NLL MSbar GRV98LO | 5012 | LO GRV98HO | 5013 | NLL MSbar MRSTc-g98 | 3072 | LO MRSTht | 3077 | NLL MSbar MRSTc-g99 | 3078 | NLL DIS MRST-l-aS | 3092 | NLL MSbar MRST-h-aS | 3093 | NLL MSbar MRST-l-d_u | 3100 | NLL MSbar Notations: . NLL: next-to-leading log . MSbar: minimal substraction renormalization scheme . LO: leading order . HO: higher order . DIS: deep inelastic scattering renormalization scheme For a full list check the documentations links