\begin{longtable}[H]{p{0.25\textwidth}|p{0.6\textwidth}|p{0.15\textwidth}} \caption{PACS categories most correlated to the topics derived with the unsupervised model. Correlation is measured as the mutual pointwise information (pmi).} \label{table:full_topics_pacs_pmi}\\ \toprule & & pmi \\ topic & PACS category & \\ \midrule \endfirsthead \caption[]{PACS categories most correlated to the topics derived with the unsupervised model. Correlation is measured as the mutual pointwise information (pmi).} \\ \toprule & & pmi \\ topic & PACS category & \\ \midrule \endhead \midrule \multicolumn{3}{r}{{Continued on next page}} \\ \midrule \endfoot \bottomrule \endlastfoot \multirow{5}{*}{\begin{tabular}{l}Algorithms and\\ calculation\\ techniques\end{tabular}} & Lattice theory and statistics & 1.39 \\ & Lattice gauge theory & 1.17 \\ & Lattice QCD calculations & 1.12 \\ & Particle correlations and fluctuations & 0.99 \\ & Inelastic scattering: many-particle final states & 0.80 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Amplitude of\\ processes in\\ colliders\end{tabular}} & Baryon resonances (S=C=B=0) & 1.13 \\ & Pion-baryon interactions & 1.10 \\ & Meson-meson interactions & 1.03 \\ & Nucleon-nucleon interactions & 0.93 \\ & Dispersion relations & 0.92 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Amplitudes and\\ Feynman Diagram\end{tabular}} & Analytic properties of S matrix & 1.66 \\ & Properties of perturbation theory & 1.57 \\ & General properties of perturbation theory & 1.39 \\ & Dispersion relations & 1.04 \\ & Lattice theory and statistics & 0.86 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Analyses and\\ measurements\\ from colliders\end{tabular}} & Neutrino-induced reactions & 0.96 \\ & Muons & 0.89 \\ & Neutrino, muon, pion, and other elementary particle detectors; cosmic ray detectors & 0.81 \\ & Pion-baryon interactions & 0.79 \\ & Meson production & 0.77 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Annihilation\\ and scattering\\ cross-sections\end{tabular}} & Total cross sections & 1.60 \\ & Hadron production in e−e+ interactions & 1.23 \\ & Meson production & 1.11 \\ & Elastic and Compton scattering & 1.07 \\ & Electromagnetic processes and properties & 1.03 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Astrophysics\end{tabular}} & Collective flow & 1.91 \\ & Hydrodynamic models & 1.74 \\ & Particle correlations and fluctuations & 1.52 \\ & Relativistic heavy-ion collisions & 1.38 \\ & Particle and resonance production & 1.35 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Black holes\end{tabular}} & Black holes & 2.64 \\ & Quantum aspects of black holes, evaporation, thermodynamics & 2.59 \\ & Physics of black holes & 2.57 \\ & Classical black holes & 2.55 \\ & Higher-dimensional black holes, black strings, and related objects & 2.38 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Boundary\\ conditions/non-\\ locality\end{tabular}} & Entanglement and quantum nonlocality & 1.18 \\ & Theory of quantized fields & 0.90 \\ & Foundations of quantum mechanics; measurement theory & 0.80 \\ & Conformal field theory, algebraic structures & 0.71 \\ & Integrable systems & 0.70 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}CP violating\\ processes\end{tabular}} & Decays of bottom mesons & 1.53 \\ & Determination of Cabibbo-Kobayashi \& Maskawa (CKM) matrix elements & 1.48 \\ & Bottom mesons (|B|>0) & 1.34 \\ & Charge conjugation, parity, time reversal, and other discrete symmetries & 1.30 \\ & Decays of bottom mesons & 1.19 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Conformal Field\\ Theory\end{tabular}} & Conformal field theory, algebraic structures & 1.72 \\ & Algebraic methods & 1.34 \\ & Nonperturbative techniques; string field theory & 1.19 \\ & Lattice theory and statistics & 1.15 \\ & M theory & 0.99 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Cosmological\\ sources\end{tabular}} & Background radiations & 1.86 \\ & Observational cosmology (including Hubble constant, distance scale, cosmological constant, early Universe, etc) & 1.55 \\ & Neutrino, muon, pion, and other elementary particles; cosmic rays & 1.49 \\ & Dark energy & 1.29 \\ & Cosmology & 1.21 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Cosmology and\\ gravity\end{tabular}} & Lorentz and Poincaré invariance & 1.34 \\ & Loop quantum gravity, quantum geometry, spin foams & 1.32 \\ & Axions and other Nambu-Goldstone bosons (Majorons, familons, etc.) & 1.30 \\ & Dark energy & 1.28 \\ & Quantum cosmology & 1.26 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Cross-sections\\ in colliders\end{tabular}} & Total cross sections & 1.57 \\ & Inclusive production with identified hadrons & 1.43 \\ & Particle and resonance production & 1.42 \\ & Production & 1.40 \\ & Inclusive production with identified leptons, photons, or other nonhadronic particles & 1.36 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Dark matter\\ (particles and\\ direct\\ searches)\end{tabular}} & Dark matter & 2.36 \\ & Elementary particle processes & 1.94 \\ & Neutrino, muon, pion, and other elementary particle detectors; cosmic ray detectors & 1.40 \\ & Neutrino, muon, pion, and other elementary particles; cosmic rays & 1.18 \\ & Supersymmetric partners of known particles & 1.15 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Dark matter in\\ the universe\end{tabular}} & Dark matter & 1.86 \\ & Dark energy & 1.69 \\ & Elementary particle processes & 1.44 \\ & Observational cosmology (including Hubble constant, distance scale, cosmological constant, early Universe, etc) & 1.36 \\ & Cosmology & 1.27 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Decay\\ measurements\end{tabular}} & Decays of charmed mesons & 1.93 \\ & Decays of bottom mesons & 1.91 \\ & Determination of Cabibbo-Kobayashi \& Maskawa (CKM) matrix elements & 1.83 \\ & Decays of J/ψ, Υ, and other quarkonia & 1.82 \\ & Bottom mesons (|B|>0) & 1.82 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Detectors\end{tabular}} & Neutrino, muon, pion, and other elementary particle detectors; cosmic ray detectors & 1.48 \\ & Muons & 0.99 \\ & Ordinary neutrinos & 0.98 \\ & Neutrino interactions & 0.91 \\ & Solar neutrinos & 0.87 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Double-beta\\ decay\end{tabular}} & Baryons & 1.20 \\ & Charmed baryons (|C|>0, B=0) & 1.08 \\ & Glueball and nonstandard multi-quark/gluon states & 1.03 \\ & Bottom baryons (|B|>0) & 0.99 \\ & Hadron mass models and calculations & 0.97 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Early-universe\\ and other\\ cosmological\\ data\end{tabular}} & Background radiations & 1.57 \\ & Dark matter & 1.38 \\ & Axions and other Nambu-Goldstone bosons (Majorons, familons, etc.) & 1.28 \\ & Neutrino, muon, pion, and other elementary particles; cosmic rays & 1.27 \\ & Elementary particle processes & 1.11 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Effective Field\\ Theory\end{tabular}} & Noncommutative field theory & 1.89 \\ & Noncommutative geometry & 1.77 \\ & Quantum mechanics & 0.85 \\ & Nonlinear or nonlocal theories and models & 0.82 \\ & Canonical quantization & 0.81 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Electromagnetis\\ m\end{tabular}} & Hydrodynamic models & 1.45 \\ & Collective flow & 1.31 \\ & Electric and magnetic moments & 1.16 \\ & Relativistic heavy-ion collisions & 1.11 \\ & Relativistic wave equations & 1.11 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Events in\\ colliders\\ (kinematics?)\end{tabular}} & Limits on production of particles & 1.71 \\ & Production & 1.60 \\ & Inclusive production with identified leptons, photons, or other nonhadronic particles & 1.57 \\ & W bosons & 1.53 \\ & Jets in large-Q2 scattering & 1.53 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Events in\\ colliders\\ (signatures?)\end{tabular}} & Limits on production of particles & 1.69 \\ & Jets in large-Q2 scattering & 1.56 \\ & Production & 1.45 \\ & Inclusive production with identified leptons, photons, or other nonhadronic particles & 1.37 \\ & W bosons & 1.35 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Experimental\\ investigation\\ of the leptonic\\ sector\end{tabular}} & Limits on production of particles & 1.38 \\ & Electromagnetic decays & 1.30 \\ & Decays of J/ψ, Υ, and other quarkonia & 1.26 \\ & Decays of J/ψ, Υ, and other quarkonia & 1.19 \\ & Muons & 1.18 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Experimental\\ jargon\end{tabular}} & Electromagnetic corrections to strong- and weak-interaction processes & 0.35 \\ & Solar neutrinos & 0.30 \\ & Electroweak radiative corrections & 0.30 \\ & Nucleon-nucleon interactions & 0.29 \\ & Neutrino-induced reactions & 0.25 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Experiments on\\ light\end{tabular}} & Specific calculations & 1.31 \\ & Elastic and Compton scattering & 1.26 \\ & Electromagnetic processes and properties & 1.09 \\ & Axions and other Nambu-Goldstone bosons (Majorons, familons, etc.) & 1.09 \\ & Quantum electrodynamics & 1.08 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Field theory\\ and gravity\end{tabular}} & Classical general relativity & 1.10 \\ & Modified theories of gravity & 1.08 \\ & Lower dimensional models; minisuperspace models & 1.06 \\ & Fundamental problems and general formalism & 1.05 \\ & Classical black holes & 1.02 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Flavor mixing\end{tabular}} & Quark and lepton masses and mixing & 1.36 \\ & Flavor symmetries & 1.30 \\ & Charge conjugation, parity, time reversal, and other discrete symmetries & 1.28 \\ & Determination of Cabibbo-Kobayashi \& Maskawa (CKM) matrix elements & 1.10 \\ & Neutrino mass and mixing & 1.06 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Flavour physics\end{tabular}} & Global symmetries (e.g., baryon number, lepton number) & 1.04 \\ & Flavor symmetries & 1.03 \\ & Non-standard-model neutrinos, right-handed neutrinos, etc. & 1.02 \\ & Unification of couplings; mass relations & 1.00 \\ & Quark and lepton masses and mixing & 0.99 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Form factors\end{tabular}} & Electromagnetic form factors & 1.97 \\ & Relativistic quark model & 1.34 \\ & Protons and neutrons & 1.33 \\ & Hyperons & 1.18 \\ & Sum rules & 1.18 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Gauge Theory\end{tabular}} & Gauge field theories & 1.20 \\ & Lorentz and Poincaré invariance & 1.16 \\ & Canonical formalism, Lagrangians, and variational principles & 1.10 \\ & Lagrangian and Hamiltonian approach & 1.09 \\ & Noncommutative field theory & 1.08 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Gauge symmetry\\ breaking/GUTs\end{tabular}} & Unified theories and models of strong and electroweak interactions & 1.34 \\ & Unification of couplings; mass relations & 1.26 \\ & Spontaneous breaking of gauge symmetries & 1.15 \\ & Unified field theories and models & 1.14 \\ & Spontaneous and radiative symmetry breaking & 0.96 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Gravitons and\\ extra-\\ dimensions\end{tabular}} & Higher-dimensional gravity and other theories of gravity & 1.41 \\ & Gravity in more than four dimensions, Kaluza-Klein theory, unified field theories; alternative theories of gravity & 1.39 \\ & Modified theories of gravity & 1.34 \\ & Lower dimensional models; minisuperspace models & 1.08 \\ & String and brane phenomenology & 1.04 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Hadronic zoo\end{tabular}} & Decays of J/ψ, Υ, and other quarkonia & 1.92 \\ & Heavy quarkonia & 1.73 \\ & Exotic mesons & 1.71 \\ & Decays of J/ψ, Υ, and other quarkonia & 1.65 \\ & Mesons with S=C=B=0, mass > 2.5 GeV (including quarkonia) & 1.58 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Heavy quarks\\ and ions\end{tabular}} & Particle and resonance production & 1.40 \\ & Particle correlations and fluctuations & 1.39 \\ & Collective flow & 1.38 \\ & Relativistic heavy-ion collisions & 1.37 \\ & Fragmentation into hadrons & 1.29 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Higgs boson\end{tabular}} & Other neutral Higgs bosons & 1.91 \\ & Supersymmetric Higgs bosons & 1.87 \\ & Non-standard-model Higgs bosons & 1.77 \\ & Extensions of electroweak Higgs sector & 1.73 \\ & Standard-model Higgs bosons & 1.69 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Higgs sector\\ beyond the SM\end{tabular}} & Other neutral Higgs bosons & 1.65 \\ & Supersymmetric Higgs bosons & 1.64 \\ & Non-standard-model Higgs bosons & 1.60 \\ & Extensions of electroweak Higgs sector & 1.55 \\ & Standard-model Higgs bosons & 1.37 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}High-energy\\ source fluxes\end{tabular}} & Neutrino, muon, pion, and other elementary particles; cosmic rays & 1.39 \\ & Neutrino, muon, pion, and other elementary particle detectors; cosmic ray detectors & 1.33 \\ & Solar neutrinos & 1.28 \\ & Background radiations & 0.89 \\ & Ordinary neutrinos & 0.74 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Holographic\\ Principle and\\ dualities\end{tabular}} & Entanglement and quantum nonlocality & 1.89 \\ & Gauge/string duality & 1.53 \\ & Conformal field theory, algebraic structures & 1.43 \\ & Higher-dimensional black holes, black strings, and related objects & 1.06 \\ & Quantum aspects of black holes, evaporation, thermodynamics & 1.02 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Inflation\end{tabular}} & Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.) & 1.80 \\ & Origin and formation of the Universe & 1.78 \\ & Observational cosmology (including Hubble constant, distance scale, cosmological constant, early Universe, etc) & 1.76 \\ & Background radiations & 1.70 \\ & Quantum cosmology & 1.67 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Lattice\\ calculation\\ techniques\end{tabular}} & Lattice QCD calculations & 1.38 \\ & Lattice gauge theory & 1.36 \\ & Lattice theory and statistics & 0.80 \\ & General properties of perturbation theory & 0.76 \\ & Renormalization & 0.74 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Lepton/Meson\\ decay\end{tabular}} & Determination of Cabibbo-Kobayashi \& Maskawa (CKM) matrix elements & 1.97 \\ & Decays of charmed mesons & 1.94 \\ & Decays of bottom mesons & 1.89 \\ & Decays of charmed mesons & 1.86 \\ & Bottom mesons (|B|>0) & 1.81 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Lie algebra\end{tabular}} & Algebraic methods & 1.39 \\ & Integrable systems & 1.28 \\ & Geometry, differential geometry, and topology & 1.19 \\ & Noncommutative geometry & 1.03 \\ & Quantum mechanics & 0.94 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Loops and\\ higher order\\ expansions in\\ Feynman\\ Diagrams\end{tabular}} & Electromagnetic corrections to strong- and weak-interaction processes & 1.32 \\ & Electroweak radiative corrections & 1.23 \\ & Specific calculations & 1.08 \\ & Summation of perturbation theory & 1.00 \\ & General properties of perturbation theory & 0.98 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}M-theory and\\ theories of\\ everything\end{tabular}} & M theory & 1.63 \\ & Supergravity & 1.34 \\ & Nonperturbative techniques; string field theory & 1.27 \\ & Compactification and four-dimensional models & 1.22 \\ & D branes & 1.13 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Matter in Yang-\\ Mills theories\end{tabular}} & Technicolor models & 1.23 \\ & Unified theories and models of strong and electroweak interactions & 1.06 \\ & Unification of couplings; mass relations & 0.99 \\ & Composite models & 0.94 \\ & Spontaneous breaking of gauge symmetries & 0.88 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Measurements\\ and analysis of\\ colliders data\end{tabular}} & Determination of Cabibbo-Kobayashi \& Maskawa (CKM) matrix elements & 0.90 \\ & Solar neutrinos & 0.87 \\ & Muons & 0.84 \\ & Neutrino, muon, pion, and other elementary particle detectors; cosmic ray detectors & 0.75 \\ & Decays of charmed mesons & 0.73 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Meson\\ phenomenology\end{tabular}} & Other mesons with S=C=0, mass < 2.5 GeV & 1.53 \\ & Hadron mass models and calculations & 1.48 \\ & Meson-meson interactions & 1.45 \\ & Mesons & 1.41 \\ & Glueball and nonstandard multi-quark/gluon states & 1.37 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Neutrino\\ physics\end{tabular}} & Ordinary neutrinos & 2.04 \\ & Solar neutrinos & 1.98 \\ & Non-standard-model neutrinos, right-handed neutrinos, etc. & 1.97 \\ & Neutrino mass and mixing & 1.94 \\ & Neutrino, muon, pion, and other elementary particles; cosmic rays & 1.92 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Non-abelian\\ theories\end{tabular}} & Gauge field theories & 1.04 \\ & Magnetic monopoles & 1.03 \\ & Canonical formalism, Lagrangians, and variational principles & 0.97 \\ & Lagrangian and Hamiltonian approach & 0.88 \\ & Noncommutative field theory & 0.87 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Partons\\ distributions\end{tabular}} & Summation of perturbation theory & 1.62 \\ & Factorization & 1.49 \\ & Production & 1.46 \\ & Jets in large-Q2 scattering & 1.44 \\ & Perturbative calculations & 1.43 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Perturbative\\ QCD\end{tabular}} & Factorization & 1.17 \\ & Summation of perturbation theory & 1.10 \\ & Perturbative calculations & 1.03 \\ & Production & 0.66 \\ & Heavy quark effective theory & 0.65 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Phenomenologica\\ l jargon\end{tabular}} & Foundations of quantum mechanics; measurement theory & 0.34 \\ & Axions and other Nambu-Goldstone bosons (Majorons, familons, etc.) & 0.31 \\ & Loop quantum gravity, quantum geometry, spin foams & 0.30 \\ & Experimental tests of gravitational theories & 0.29 \\ & Potential models & 0.27 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}QCD calculation\\ techniques\end{tabular}} & Gluons & 1.29 \\ & General properties of perturbation theory & 1.02 \\ & Renormalization & 0.96 \\ & General properties of QCD (dynamics, confinement, etc.) & 0.94 \\ & Lattice gauge theory & 0.89 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Quantum\\ Chromodynamics\\ (QCD)\end{tabular}} & Sum rules & 2.24 \\ & Other nonperturbative calculations & 1.42 \\ & Bottom baryons (|B|>0) & 1.32 \\ & Charmed baryons (|C|>0, B=0) & 1.26 \\ & Heavy quark effective theory & 1.16 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Quantum Field\\ Theory\end{tabular}} & Foundations of quantum mechanics; measurement theory & 1.32 \\ & Quantum mechanics & 1.15 \\ & Algebraic methods & 1.06 \\ & Canonical quantization & 0.97 \\ & Theory of quantized fields & 0.95 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Quantum Systems\\ and Equations\\ of motion\end{tabular}} & Canonical formalism, Lagrangians, and variational principles & 1.23 \\ & Magnetic monopoles & 1.15 \\ & Lagrangian and Hamiltonian approach & 1.11 \\ & Relativistic wave equations & 1.04 \\ & Canonical quantization & 1.00 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Quantum systems\\ and\\ thermodynamics\end{tabular}} & Hydrodynamic models & 1.21 \\ & Theory of quantized fields & 0.96 \\ & Foundations of quantum mechanics; measurement theory & 0.93 \\ & Entanglement and quantum nonlocality & 0.90 \\ & Quark-gluon plasma & 0.75 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Renormalization\end{tabular}} & Renormalization group evolution of parameters & 1.77 \\ & Renormalization & 1.46 \\ & General properties of perturbation theory & 0.85 \\ & Technicolor models & 0.85 \\ & Other nonperturbative techniques & 0.81 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Scattering of\\ composite\\ particles\end{tabular}} & Total and inclusive cross sections (including deep-inelastic processes) & 1.78 \\ & Photon and charged-lepton interactions with hadrons & 1.65 \\ & Elastic and Compton scattering & 1.49 \\ & Regge theory, duality, absorptive/optical models & 1.35 \\ & Polarization in interactions and scattering & 1.32 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Search for BSM\\ physics\end{tabular}} & Muons & 1.12 \\ & Decays of K mesons & 1.09 \\ & Decays of taus & 1.09 \\ & Neutrino, muon, pion, and other elementary particle detectors; cosmic ray detectors & 1.07 \\ & Neutral currents & 1.05 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Sigma models\\ (?)\end{tabular}} & Integrable systems & 1.74 \\ & Algebraic methods & 1.23 \\ & Supersymmetry & 1.09 \\ & Lattice theory and statistics & 1.00 \\ & Conformal field theory, algebraic structures & 0.99 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Solar neutrinos\end{tabular}} & Solar neutrinos & 2.64 \\ & Ordinary neutrinos & 2.30 \\ & Neutrino mass and mixing & 2.13 \\ & Non-standard-model neutrinos, right-handed neutrinos, etc. & 1.98 \\ & Neutrino, muon, pion, and other elementary particles; cosmic rays & 1.89 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Space-time\\ geometry and\\ gravity\end{tabular}} & Exact solutions & 1.75 \\ & Classical general relativity & 1.57 \\ & Einstein-Maxwell spacetimes, spacetimes with fluids, radiation or classical fields & 1.53 \\ & Classical black holes & 1.51 \\ & Higher-dimensional black holes, black strings, and related objects & 1.51 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Spin/angular mo\\ mentum/polariza\\ tion\end{tabular}} & Polarization in interactions and scattering & 1.80 \\ & Photon and charged-lepton interactions with hadrons & 1.47 \\ & Fragmentation into hadrons & 1.41 \\ & Inclusive production with identified hadrons & 1.35 \\ & Meson production & 1.21 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}States of\\ matter\end{tabular}} & Quark deconfinement, quark-gluon plasma production, and phase transitions & 1.09 \\ & Finite-temperature field theory & 1.08 \\ & Gauge/string duality & 1.02 \\ & Lattice theory and statistics & 0.90 \\ & Quark matter & 0.84 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}String theory\end{tabular}} & D branes & 1.86 \\ & Magnetic monopoles & 1.71 \\ & Nonperturbative techniques; string field theory & 1.67 \\ & Extended classical solutions; cosmic strings, domain walls, texture & 1.52 \\ & Strings and branes & 1.46 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Supergravity\end{tabular}} & M theory & 1.62 \\ & Supergravity & 1.58 \\ & Compactification and four-dimensional models & 1.51 \\ & Nonperturbative techniques; string field theory & 1.37 \\ & Geometry, differential geometry, and topology & 1.30 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Supersymmetric\\ particles\end{tabular}} & Supersymmetric partners of known particles & 1.68 \\ & Supersymmetric models & 1.35 \\ & Supersymmetric Higgs bosons & 1.27 \\ & Unification of couplings; mass relations & 0.85 \\ & Non-standard-model Higgs bosons & 0.82 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Supersymmetric\\ theories\end{tabular}} & Supersymmetry & 1.37 \\ & M theory & 1.35 \\ & Supergravity & 1.20 \\ & Nonperturbative techniques; string field theory & 1.05 \\ & Gauge field theories & 1.05 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Symétrie\\ chirale\end{tabular}} & Chiral Lagrangians & 1.55 \\ & Chiral symmetries & 1.54 \\ & Lattice QCD calculations & 1.48 \\ & Light quarks & 1.30 \\ & Lattice gauge theory & 1.21 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Theoretical\\ jargon\end{tabular}} & Integrable systems & 0.36 \\ & Quantum mechanics & 0.36 \\ & Foundations of quantum mechanics; measurement theory & 0.33 \\ & Algebraic methods & 0.31 \\ & Fundamental problems and general formalism & 0.28 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Thermodynamics\end{tabular}} & Quark deconfinement, quark-gluon plasma production, and phase transitions & 1.62 \\ & Quark matter & 1.61 \\ & Finite-temperature field theory & 1.57 \\ & Quark-gluon plasma & 1.35 \\ & Other models for strong interactions & 1.11 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Top quark\end{tabular}} & Top quarks & 1.96 \\ & Neutral currents & 1.20 \\ & Limits on production of particles & 1.07 \\ & Other neutral Higgs bosons & 0.98 \\ & Other gauge bosons & 0.97 \\ \cline{1-3} \multirow{5}{*}{\begin{tabular}{l}Topology\end{tabular}} & Compactification and four-dimensional models & 1.40 \\ & Geometry, differential geometry, and topology & 1.31 \\ & Nonperturbative techniques; string field theory & 1.20 \\ & M theory & 1.11 \\ & Strings and branes & 1.04 \\ \end{longtable}