To identify each Feynman Diagram uniquely there is a eight-digit number associated to each diagram. The concept of this number is explained by the following tree. The undefined digit are just used to distinguish the diagrams belonging to the same subgroup. In some cases the later digits are chosen such that a topical order is achieved.
1: pp/pp̅ scattering10: Diagram on Parton level100: gluon/gluon scattering101: quark/quark (or anti-quark) scattering102: quark/gluon scattering109: other11: Diagram on Proton level110: gluon/gluon scattering111: quark/quark (or anti-quark) scattering112: quark/gluon scattering119: other12: Drell-Yan processes13: γ final states (other than correction/FSR)18: General higher order diagrams19: other2: ep scattering20: Diagram on Parton level21: Diagram on Proton level29: other3: lepton/lepton scattering30: γ exchange s-channel300: to lepton/lepton301: to quark/quark302: to quark/quark with gluon radiation309: to others31: γ/Z0 exchange t-channel32: Z0 exchange s-channel320: to lepton/lepton321: to quark/quark322: to quark/quark with gluon radiation323: to WW pair329: to others33: intermediate resonances330: light quarks331: Charmonia332: Bottomonia39: other4: EW physics40: Z041: W42: SM Higgs420: gluon fusion421: Vector boson fusion422: Higgs strahlung423: Associated production424: Leptonic decays425: Hadronic decays426: Decays to vector bosons427: Decays to γ43: Drell-Yan49: other5: Flavour physics50: light quarks500: SM Tree diagram501: SM Box diagram502: SM Penguin diagram503: BSM diagram51: charm quarks510: SM Tree diagram511: SM Box diagram512: SM Penguin diagram513: BSM diagram52: bottom quarks520: SM Tree diagram521: SM Box diagram522: SM Penguin diagram523: BSM diagram53: Leptonic530: SM Oscillation diagram531: SM Penguin diagram532: BSM diagram59: other6: Top physics60: Production600: pair601: single61: Decay610: hadronic611: leptonic69: other7: SUSY70: Production71: Decay710: including squarks711: including sleptons712: including gauginos72: Higgs720: Neutral721: Charged79: other8: Beyond SM80: Extra dimension81: 4th generation82: GUT83: Composite Higgs84: General DM85: Little Higgs86: Leptoquark89: other9: Miscellaneous
Please notice that some of the definitions are overlapping (e.g. BSM in Flavour and BSM as main group). We assign the diagrams according to their context. The later, topical ordering by the digits four to eight is not listed here.