MMHT2015qed PDFs: LHAPDF grids
Here we enclose the preliminary LHAPDF 6 grid files corresponding to the MMHT2015qed PDFs, published in
L. A. Harland-Lang, A. D. Martin, R. Nathvani, R. S. Thorne "Ad Lucem: QED Parton Distribution Functions in the MMHT Framework" arXiv:1907.02750
Please reference this paper if you use the PDFs for a publication.
We provide NLO and NNLO grids for the central fit and 50 eigvectors sets (corresponding to 25 eigenvectors in the '+' and '-' directions), for a 68% confidence interval. These are defined using the Hessian approach and dynamical tolerance criteria described in arXiv:0901.0002. Further uncertainties due to the photon PDF input are provided in members 51-62. These correspond to 6 +/- pairs, and the corresponding uncertainty due to these should be calculated in the usual way, see arXiv:1907.02750 for further details.
| NLO | NNLO | |
|---|---|---|
| QCD-only fit | MMHT2015qcd_nlo | MMHT2015qcd_nnlo |
| Total photon (default) | MMHT2015qed_nlo | MMHT2015qed_nnlo |
| Elastic photon only | MMHT2015qed_nlo_elastic | MMHT2015qed_nnlo_elastic |
| Inelastic photon only | MMHT2015qed_nlo_inelastic | MMHT2015qed_nnlo_inelastic |