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Structure

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 scattering
10:                   Diagram on Parton level
100:                     gluon/gluon scattering
101:                     quark/quark (or anti-quark) scattering
102:                     quark/gluon scattering
109:                     other
11:                   Diagram on Proton level
110:                     gluon/gluon scattering
111:                     quark/quark (or anti-quark) scattering
112:                     quark/gluon scattering
119:                     other
12:                   Drell-Yan processes
13:                   γ final states (other than correction/FSR)
18:                   General higher order diagrams
19:                   other
2:                 ep scattering
20:                   Diagram on Parton level
21:                   Diagram on Proton level
29:                   other
3:                 lepton/lepton scattering
30:                   γ exchange s-channel
300:                     to lepton/lepton
301:                     to quark/quark
302:                     to quark/quark with gluon radiation
309:                     to others
31:                   γ/Z0 exchange t-channel
32:                   Z0 exchange s-channel
320:                     to lepton/lepton
321:                     to quark/quark
322:                     to quark/quark with gluon radiation
323:                     to WW pair
329:                     to others
33:                   intermediate resonances
330:                     light quarks
331:                     Charmonia
332:                     Bottomonia
39:                   other
4:                 EW physics
40:                   Z0
41:                   W
42:                   SM Higgs
420:                     gluon fusion
421:                     Vector boson fusion
422:                     Higgs strahlung
423:                     Associated production
424:                     Leptonic decays
425:                     Hadronic decays
426:                     Decays to vector bosons
427:                     Decays to γ
43:                   Drell-Yan
49:                   other
5:                 Flavour physics
50:                   light quarks
500:                     SM Tree diagram
501:                     SM Box diagram
502:                     SM Penguin diagram
503:                     BSM diagram
51:                   charm quarks
510:                     SM Tree diagram
511:                     SM Box diagram
512:                     SM Penguin diagram
513:                     BSM diagram
52:                   bottom quarks
520:                     SM Tree diagram
521:                     SM Box diagram
522:                     SM Penguin diagram
523:                     BSM diagram
53:                   Leptonic
530:                     SM Oscillation diagram
531:                     SM Penguin diagram
532:                     BSM diagram
59:                   other
6:                 Top physics
60:                   Production
600:                     pair
601:                     single
61:                   Decay
610:                     hadronic
611:                     leptonic
69:                   other
7:                 SUSY
70:                   Production
71:                   Decay
710:                     including squarks
711:                     including sleptons
712:                     including gauginos
72:                   Higgs
720:                     Neutral
721:                     Charged
79:                   other
8:                 Beyond SM
80:                   Extra dimension
81:                   4th generation
82:                   GUT
83:                   Composite Higgs
84:                   General DM
85:                   Little Higgs
86:                   Leptoquark
89:                   other
9:                 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.