**1999 PACS, 10. - 19.
**

**
Summary of Scheme
**

10. THE PHYSICS OF ELEMENTARY PARTICLES AND FIELDS (for cosmic rays, see
98.40; for experimental methods and instrumentation, see 29)

**11. General Theory of Fields and Particles** (see also 03.65 Quantum

mechanics, 03.70 Theory of quantized fields, 03.80 General theory of

scattering)

11.10.-z Field theory (for gauge field theories, see 11.15)

11.10.Cd Axiomatic approach

11.10.Ef Lagrangian and Hamiltonian approach

11.10.Gh Renormalization

11.10.Hi Renormalization group evolution of parameters

11.10.Jj Asymptotic problems and properties

11.10.Kk Field theories in dimensions other than four (see also 04.50 Gravity

in more than four dimensions; 04.60.K Lower dimensional models in

quantum gravity)

11.10.Lm Nonlinear or nonlocal theories and models (see also 11.27 Extended

classical solution; cosmic strings, domain walls, texture)

11.10.St Bound and unstable states; Bethe-Salpeter equations

11.10.Wx Finite-temperature field theory

***** Relativistic wave equations, see 03.65.P

11.15.-q Gauge field theories

11.15.Bt General properties of perturbation theory

11.15.Ex Spontaneous breaking of gauge symmetries

11.15.Ha Lattice gauge theory (see also 12.38.G Lattice QCD calculations)

11.15.Kc Classical and semiclassical techniques

11.15.Me Strong-coupling expansions

11.15.Pg Expansions for large numbers of components (e.g., 1/N sub c
expansions)

11.15.Tk Other nonperturbative techniques

11.25.-w Theory of fundamental strings

11.25.Db Properties of perturbation theory

11.25.Hf Conformal field theory, algebraic structures

11.25.Mj Compactification and four-dimensional models

11.25.Pm Noncritical string theory

11.25.Sq Nonperturbative techniques; string field theory

11.27.+d Extended classical solutions; cosmic strings, domain walls, texture

(see 98.80.C in cosmology)

11.30.-j Symmetry and conservation laws (see also 02.20 Group theory)

11.30.Cp Lorentz and Poincare invariance

11.30.Er Charge conjugation, parity, time reversal, and other discrete

symmetries

11.30.Fs Global symmetries (e.g., baryon number, lepton number)

11.30.Hv Flavor symmetries

11.30.Ly Other internal and higher symmetries

11.30.Na Nonlinear and dynamical symmetries (spectrum-generating symmetries)

11.30.Pb Supersymmetry (see also 12.60.J Supersymmetric models)

11.30.Qc Spontaneous and radiative symmetry breaking

11.30.Rd Chiral symmetries

11.40.-q Currents and their properties

11.40.Dw General theory of currents

11.40.Ex Formal properties of current algebras (see also 12.39.F Chiral

Lagrangians)

11.40.Ha Partially conserved axial-vector currents

11.55.-m S-matrix theory; analytic structure of amplitudes

11.55.Bq Analytic properties of S matrix

11.55.Ds Exact S matrices

11.55.Fv Dispersion relations

11.55.Hx Sum rules

11.55.Jy Regge formalism (see also 12.40.N in strong interactions)

11.80.-m Relativistic scattering theory

11.80.Cr Kinematical properties (helicity and invariant amplitudes, kinematic
singularities, etc.)

11.80.Et Partial-wave analysis

11.80.Fv Approximations (eikonal approximation, variational principles, etc.)

11.80.Gw Multichannel scattering

11.80.Jy Many-body scattering and Faddeev equation

11.80.La Multiple scattering

11.90.+t Other topics in general theory of fields and particles (restricted
to new topics in section 11)

**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

***** see also 24.85 Quarks, gluons, and QCS in nuclei and nuclear processes

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

***** see also 24.85 Quarks, gluons, and QCD in
nuclei and nuclear processes

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

***** see also 12.10 Unified field theories and models

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 (restricted to new
topics in section 12)

**13. Specific Reactions and Phenomenology**

13.10.+q Weak and electromagnetic interactions of leptons (see also 13.35
Decays of leptons)

13.15.+g Neutrino interactions (for neutrino-lepton interactions, see 13.10)

13.20.-v Leptonic and semileptonic decays of mesons

13.20.Cz Decays of pi mesons

13.20.Eb Decays of K mesons

13.20.Fc Decays of charmed mesons

13.20.Gd Decays of J/psi, Upsilon, and other quarkonia

13.20.He Decays of bottom mesons

13.20.Jf Decays of other mesons

13.25.-k Hadronic decays of mesons

13.25.Cq Decays of pi mesons

13.25.Es Decays of K mesons

13.25.Ft Decays of charmed mesons

13.25.Gv Decays of J/psi, Upsilon, and other quarkonia

13.25.Hw Decays of bottom mesons

13.25.Jx Decays of other mesons

13.30.-a Decays of baryons

13.30.Ce Leptonic and semileptonic decays

13.30.Eg Hadronic decays

13.35.-r Decays of leptons

13.35.Bv Decays of muons

13.35.Dx Decays of taus

13.35.Hb Decays of heavy neutrinos

13.38.-b Decays of intermediate bosoms

13.38.Be Decays of W bosons

13.38.Dg Decays of Z bosons

13.40.-f Electromagnetic processes and properties (see also 13.10 Weak and
electromagnetic interactions of leptons)

13.40.Dk Electromagnetic mass differences

13.40.Em Electric and magnetic moments

13.40.Gp Electromagnetic form factors

13.40.Hq Electromagnetic decays

13.40.Ks Electromagnetic corrections to strong- and weak-interaction processes

13.60.-r Photon and charged-lepton interactions with hadrons (for neutrino
interactions, see 13.15)

13.60.Fz Elastic and Compton scattering

13.60.Hb Total and inclusive cross sections (including deep-inelastic
processes)

13.60.Le Meson production

13.60.Rj Baryon production

13.65.+i Hadron production by electron-positron collisions

13.75.-n Hadron-induced low- and intermediate-energy reactions and scattering
(energy <_ 10 GeV) (for higher energies, see 13.85)

13.75.Cs Nucleon-nucleon interactions (including antinucleons, deuterons, etc.)
(for N-N interactions in nuclei, see 21.30)

13.75.Ev Hyperon-nucleon interactions

13.75.Gx Pion-baryon interactions

13.75.Jz Kaon-baryon interactions

13.75.Lb Meson-meson interactions

13.85.-t Hadron-induced high- and super-high-energy interactions (energy > 10
GeV) (for low energies, see 13.75)

13.85.Dz Elastic scattering

13.85.Fb Inelastic scattering: two-particle final states

13.85.Hd Inelastic scattering: many-particle final states

13.85.Lg Total cross sections

13.85.Ni Inclusive production with identified hadrons

13.85.Qk Inclusive production with identified leptons, photons, or other
nonhadronic particles

13.85.Rm Limits on production of particles

13.85.Tp Cosmic-ray interactions (see also 98.40 Cosmic rays)

13.87.-a Jets in large-Q sup 2 scattering

13.87.Ce Production

13.87.Fh Fragmentation into hadrons

13.88.+e Polarization in interactions and scattering

13.90.+i Other topics in specific reactions and phenomenology of elementary
particles (restricted to new topics in section 13)

**14. Properties of Specific Particles**

14.20.-c Baryons (including antiparticles)

14.20.Dh Protons and neutrons

14.20.Gk Baryon resonances with S=0

14.20.Jn Hyperons

14.20.Lq Charmed baryons

14.20.Mr Bottom baryons

14.20.Pt Dibaryons

14.40.-n Mesons

14.40.Aq Pi, K, and eta mesons

14.40.Cs Other mesons with S=C=0, mass < 2.5 GeV

14.40.Ev Other strange mesons

14.40.Gx Mesons with S=C=B=0, mass > 2.5 GeV (including quarkonia)

14.40.Lb Charmed mesons

14.40.Nd Bottom mesons

14.60.-z Leptons

14.60.Cd Electrons (including positrons)

14.60.Ef Muons

14.60.Fg Taus

14.60.Hi Other charged heavy leptons

14.60.Lm Ordinary neutrinos (nu sub e, nu sub mu, nu sub tau)

14.60.Pq Neutrino mass and mixing (see also 12.15.F Quark and lepton masses and
mixing)

14.60.St Non-standard-model neutrinos, right-handed neutrinos, etc.

14.65.-q Quarks

14.65.Bt Light quarks

14.65.Dw Charmed quarks

14.65.Fy Bottom quarks

14.65.Ha Top quarks

14.70.-e Gauge bosons

14.70.Bh Photons

14.70.Dj Gluons

14.70.Fm W bosons

14.70.Hp Z bosons

14.70.Pw Other gauge bosons

14.80.-j Other particles (including hypothetical)

14.80.Bn Standard-model Higgs bosons

14.80.Cp Non-standard-model Higgs bosons

14.80.Hv Magnetic monopoles

14.80.Ly Supersymmetric partners of known particles

14.80.Mz Axions and other Nambu-Goldstone bosons (Majorons, familons, etc.)