12. Specific theories and interaction models; particle systematics
12.10.-g Unified field theories and models (see also 04.50-in general
relativity and gravitation, 11.25.M Compactification and four-
dimensional models)
12.10.Dm Unified theories and models of strong and electroweak interactions
12.10.Kt Unification of couplings; mass relations
12.15.-y Electroweak interactions
12.15.Ff Quark and lepton masses and mixing (see also 14.60.P Neutrino mass and
mixing)
12.15.Hh Determination of Kobayashi-Maskawa matrix elements
12.15.Ji Applications of electroweak models to specific processes
12.15.Lk Electroweak radiative corrections (see also 13.40.K Electromagnetic
corrections to strong- and weak-interaction processes)
12.15.Mm Neutral currents
12.20.-m Quantum electrodynamics
12.20.Ds Specific calculations
12.20.Fv Experimental tests
12.38.-t Quantum chromodynamics
12.38.Aw General properties of QCD (dynamics, confinement, etc.)
12.38.Bx Perturbative calculations
12.38.Cy Summation of perturbation theory
12.38.Gc Lattice QCD calculations (see also 11.15.H Lattice gauge theory)
12.38.Lg Other nonperturbative calculations
12.38.Mh Quark-gluon plasma
12.38.Qk Experimental tests
12.39.-x Phenomenological quark models
12.39.Ba Bag model
12.39.Dc Skyrmions
12.39.Fe Chiral Lagrangians
12.39.Hg Heavy quark effective theory
12.39.Jh Nonrelativistic quark model
12.39.Ki Relativistic quark model
12.39.Mk Glueball and nonstandard multi-quark/gluon states
12.39.Pn Potential models
12.40.-y Other models for strong interactions
12.40.Ee Statistical models
12.40.Nn Regge theory, duality, absorptive/optical models (see also 11.55.J
Regge formalism)
12.40.Vv Vector-meson dominance
12.40.Yx Hadron mass models and calculations
12.60.-i Models beyond the standard model
12.60.Cn Extensions of electroweak gauge sector
12.60.Fr Extensions of electroweak Higgs sector
12.60.Jv Supersymmetric models (see also 04.65 Supergravity)
12.60.Nz Technicolor models
12.60.Rc Composite models
12.90.+b Miscellaneous theoretical ideas and models