Cracking the Particle Code of the Universe

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Cracking the Particle Code of the Universe Page 30

by Moffat, John W.

ether, 61, 78, 205–206, 208

  European Organization for Nuclear Research (CERN). See CERN (European Organization for Nuclear Research)

  Evens, Dan, 136

  evolution, theory of, 182

  exclusion principle, 10

  experimentalists: cautious in announcements, 155

  at CERN (European Organization for Nuclear Research), 149, 170

  data presented by, 109

  false claims damaging reputations and careers, 114

  extended Technicolor model, 126

  extra space dimensions, ix

  Faddeev, Ludvig, 84

  false vacuum, 91, 92

  Faraday, Michael, 16, 206

  Feinberg, Frank, 138

  femtobarn (fb), 108, 206

  Fermi, Enrico, 17

  Fermi coupling constant (G F), 17

  Fermi National Accelerator Laboratory (Fermi Lab), 212

  fermion-antifermion decay, 194

  fermion masses, 79, 179

  fermions, 4, 10, 71, 206

  fermiophobic boson, 120

  Ferrara, Sergio, 72

  ferromagnetism, explaining, 84

  Feynman, Richard, 9, 17, 19, 27–29, 38, 83–84, 134

  Feynman diagrams, 18, 19, 20

  Feynman loop integrals, 134

  Feynman propagator, 143

  fifth quark, 14

  fine-structure constant, 18, 141

  fine-tuning, 168, 176–178, 206

  five-dimensional spacetime, 168

  fixed distance scale or gauge, metric theory of, 63

  flavors of quarks and leptons, 11, 12

  mixing of quark, 165

  fluorescence, 34

  forces, in nature, 15–17, 205

  four-dimensional spacetime, 208

  four-fermion interaction, 126

  fourth quark: prediction of, 12, 165

  solving anomaly problem, 13

  fourth spatial dimension, 75

  fractionally charged particles, 6, 8, 9, 12, 29, 210

  Frank, Il’ia, 34

  Freedman, Daniel, 72

  French National Institute of Nuclear and Particle Physics, 151

  Friedmann, Alexander, 73

  Friedmann-Robertson-Walker standard model, 131

  Fritzsch, Harald, 10, 11, 83

  “fudge factor,” 134

  Fukui, Shuji, 37

  Fundamental Physics Prize Foundation, 175

  future light cone, 209

  Galilean invariance, 61

  Galileo, 60

  Galois, Evariste, 56

  Gargamelle bubble chamber, 35, 36

  gauge, 21, 22

  gauge bosons, 12, 23, 206

  gauge hierarchy problem, 178–179, 185

  gauge interactions, in Technicolor, 124

  gauge invariance, 22, 80, 206

  conservation of electric charge from, 62

  global, 65

  of interactions of protons and neutrons, 23

  issue of, 141–142

  maintaining in a nonlocal electroweak model, 136

  of Maxwell’s equations, 62

  in quantum field theory, 83

  retaining even with masses added in by hand, 142

  violation of, 134

  in weak interactions, 81

  gauge symmetry, 63

  gauge theories: renormalizability of, 21, 22, 145

  Geiger counter, 37, 206

  Gell-Mann, Murray, 1, 2–3, 4, 6, 7, 10, 11, 19, 27, 28, 30, 60, 83, 86

  general relativity, 15, 206

  generators: finite number of, 59

  of the Lie group SU(3), 60

  GeV (billions of electron volts), xi, 206

  ghost fields, guaranteeing renormalizability, 84

  Gianotti, Fabiola, 98, 158, 160, 175

  Gilbert, Walter, 85

  GIM (Glashow, Iliopoulos, and Maiani) mechanism, 13, 14

  Ginzberg, Vitaly, x, 87

  Ginzberg-Landau phenomenon, 87–88

  Ginzberg-Landau wave field, 89

  Glaser, Donald, 35, 204

  Glashow, Sheldon, xiv, 11, 13, 27, 84, 142, 161

  Glashow-Weinberg-Salam model, 93

  gluino, 73–74

  gluons, 66, 206

  binding top quark and antitop quark, 127

  eight colored, 11

  not detectable directly, 9

  of quantum chromodynamics (QCD), 9

  verified to exist, x

  God particle, x, 70

  Gold, Thomas, 181

  golden decay channels, 100, 102, 110, 116, 148, 152, 157, 158

  Goldstone, Jeffrey, 85, 146

  Goldstone’s theorem, 85

  Golfand, Y., 71

  Goudsmit, Samuel, 4

  grand unified theories (GUTs), 17, 121

  gravitational field, quantizing, 18

  gravitational waves, detection of, 131

  gravitino, 72, 212

  graviton, 15–16, 67, 72, 206, 212

  gravity, 205, 206

  acting between bodies, 133

  modified theories of, 76

  propagating at a finite speed, 133

  warping of spacetime, 15

  weakest force, 15

  Greenberg, Walter, 10

  Gross, David, 29, 30, 31

  group, mathematical, 2, 56, 206

  group SO(3,1), 62

  group SU(3), 4

  group SU(3) X SU(2) X U(1), 66

  group symmetry, 140

  group theory, 56, 58, 206

  Guralnik, Gerald, xi, 86, 89, 90, 160, 161

  Guth, Alan, 187, 207

  hadronic, strong-interaction background, 116

  hadronic calorimeter, 39

  hadronic debris, 100

  hadronizing jets, detecting quarks and gluons, 9–10

  hadrons, 68, 206–207

  in accelerators not revealing colored quarks, 11

  all created equal and bootstrapped, 26

  fundamental constituents of, 4

  scattering off other hadrons, 25

  with similar masses and same spin but different electric charges, 5

  termed colorless or white, 10

  ways of grouping, 27

  weak decay of, 16

  Hagen, Carl, xi, 86, 89, 90, 161

  Han, Moo Young, 10

  Harari, Haim, 14

  hard-core particles, detection of, 28

  hard scattering era, of particle physics, 8

  Hartle, Jim, 170, 171

  Hartree-Fock self-consistent procedure, 145

  Hawking, Stephen, 77, 170–172

  Hawking radiation, 77

  heavy-ion collisions, with lead ions, 52

  Heisenberg, Werner, 17, 23, 25, 58, 84, 161, 207

  Heisenberg uncertainty principle, 100

  Hess, Victor, 41, 42

  Heuer, Rolf-Dieter, 99, 159–160, 167

  hierarachy problems, in the standard model, 179

  Higgs, Peter, xi, xii, xiii, 81, 89–90, 98, 156, 157, 160, 172, 175, 207

  Higgs boson, 86, 90, 93, 144, 149, 161, 207

  according to standard model, 67

  amount of light or photons emitted by, 39

  attractive features of standard model with, xiv

  believing in the existence of, 96

  branching ratio magnitudes, 116

  candidate event for decaying into two photons, 191

  catastrophic consequences of, 163

  causing excitement, 98

  CERN results inconclusive, 104

  closely related to properties of the vacuum, 147

  composite of other particles, 124

  decay into two photons, 110, 116, 117, 120, 162

  decay into two Z bosons, 117

  decay rates, 166

  discovery of, 189

  discussion in the media and on popular physics blogs, 153

  estimating the mass of, 69–70

  evidence dropped from about 3 sigma to 2 sigma, 153

  excitement about a potential discovery of on July 3, 2
012, 154–157

  expected probability of the decay into two photons, 110

  explaining origin of the masses of elementary particles, 95, 125

  field, 91, 95, 207

  finding, xi, 94–97

  hedging bets on, 112–114

  hiding, 120

  hints of, 68, 152

  idea of, 83

  importance of, 68–69

  introducing into the electroweak theory, 138

  inventing in the standard model, 89–94

  likening to a river of flowing molasses, x

  mass of, 69-70, 95, 96, 98, 154

  mother of all particles, ix–x

  naturalness problem and, 184–186

  negative news of not discovering, 107

  not decaying directly into two photons, 148

  observable decay channels, 116

  overall accumulated evidence for new boson being, 194

  role in particle physics and cosmology, 68

  searching for, 67, 102, 152, 153

  spin and parity of, 164

  standard model not predicting mass of, 101

  strong evidence for its existence, 156

  theoretical prejudice in favor of, 119

  Higgs Centre for Theoretical Physics, 175

  Higgs imposter, 164, 165

  Higgs-like boson, 170

  at 125 to 126 GeV, 115

  issues needing to be resolved, xv

  Higgs-like particle, determing spin and parity of, 198

  Higgs mass hierarchy problem, 71–72, 96, 138, 168, 177, 180

  Higgs mechanism, xi, 24, 68, 90, 146

  Higgs resonance, data showing a “peak” in the low-mass range, 152

  high-energy defractive behavior, 28

  histogram graphs, bins displayed as, 100

  Hofstadter, Robert, 8

  Holdom, Bob, 105, 124

  horizon problem, 130, 207

  Hoyle, Fred, 181

  H particle, 189

  Hubaut, Fabrice, 191

  Hubble, Edwin, 73

  Hubble bubble, 131

  huge vacuum density, causes of, 96

  human beings, place in the universe, 181

  Ijjas, Anna, 187

  Iliopoulos, John, 13

  imposter, simulating a Higgs boson, 162, 164, 166

  Incandela, Joe, 157, 166, 167, 175

  infinite energies, cutoff of, 82

  infinities: banishing, 82–84

  encountered in the calculations performed in particle physics, 121–122

  removing in quantum field theory calculations, 17

  inflation, 68, 130–131, 147, 187, 207

  eternal 187

  simple inflation model in trouble, 187

  inflaton, 67, 68

  intermediate vector boson, 20

  International Linear Collider (ILC), planned for CERN, 44, 144

  intersecting ring collider, LHC as, 49

  invariance, 55, 60–62 See also gauge invariance

  inverse femtobarns, 108, 207

  isometries, group of all, 212

  isospin 0 (isospin singlet), 128

  isospin doublet, 7, 91

  isotopic spin, 5, 207

  charge, 65

  doublet, 7, 91

  force, 24

  group, 60

  singlet, 128

  space, 22, 23

  Jackiw, Roman, xii, 138

  jets of hadrons, 31

  Johnson, Kenneth, xii, 138

  Jonah-Lasinio, Giovanni, 85

  Jordan, Pascual, 17

  J/psi particle, 14

  Källen, Gunnar, 24

  Kaluza, Theodor, 22, 75

  Kaluza-Klein particles, 75, 76, 168

  Kane, Gordon, 77, 171

  Keenan, Ryan, 132

  Kepler, Johannes, 56, 182, 200

  Kibble, Tom, xi, 86, 89, 90, 161

  kinetic energy, 207

  Klein, Oskar, 20, 22, 75

  Kleppe, Gary, 136

  Klute, Marcus, 167–168

  K mesons, 4, 14, 42, 207

  Kobayashi, Makoto, 14

  Kramers, Hendrik, 17

  Kranmer, Kyle, 99

  Krisch, Alan, 106

  Lagrange, Joseph Louis, 207

  Lagrangian function, 185, 207

  Lamaître, Georges, 73

  LambdaCDM model, 77, 131, 132, 186, 213

  Lambda particle, 4, 5

  Landau, Lev, x, 24, 87, 118, 144, 164

  Landsberg, Greg, 166–167

  Lane, Kenneth, 166

  Langevin, Paul, 41, 42

  Large Electron Positron (LEP) collider, 46, 207

  Large Hadron Collider (LHC), ix, 46, 49-54, 208

  beginning to confirm Higgs-like boson, 146

  as a chain of accelerators, 50

  detectors at, 203

  diagram of, 50

  drawing above of and below ground, 51

  exclusion of both superpartners and extra dimensions, 76, 180

  increasing to its maximum, 115

  main experimental program at, 52

  main goal of, 52, 67

  maintenance and upgrading to an energy of 13 to 14 TeV, xv

  maximum energy of 14 TeV, 41

  most powerful accelerator ever built, 51

  no new physics discovered beyond the standard model, 77–79

  potential findings of, xv

  ring collider smashing protons, 144

  searching for prequarks, or preons, 1

  switched on in September 2008, 50

  upgrade of, 52

  Lattes, César, 2, 67

  Lawrence, Ernest, 43

  laws of nature, symmetry or lack of symmetry, 55

  Lederman, Leon, 14

  LEE (look-elsewhere effect), 101, 111

  Lee, T. D., 142

  Lenard, Philipp, 33

  leptons, 15, 208

  decay into, 148

  mass spectrum of, 179

  named by their flavor, 12

  weakly interacting particles, x

  Leucippus, 1

  Leutwyler, Heinrich, 11, 83

  LHC. See Large Hadron Collider (LHC)

  LHCb (Large Hadron Collider beauty) detector, 50–51

  LHC Search Strategies, conference, 166

  Lie, Sophus, 56

  Lie groups, 56–57, 59

  light, consisting of quantum packages, 33

  likelihood ratio analysis, 198

  Likhtman, E. P., 71

  Linde, Andre, 187

  linear accelerator 2 (LINAC 2), 50

  linear accelerators, 43, 44

  Livingston, M. Stanley, 46

  Livingston plot, 47

  local (locality), 134, 208

  local electroweak theory, 145–146

  local gauge symmetry, 65

  local probability, 101

  local quantum field theory, 141–144

  Loeb, Abraham, 187

  London, Fritz, 63

  look-elsewhere effect (LEE), 101, 111

  Lorentz, Hendrik, 61, 62, 208

  Lorentz-Fitzgerald contraction, 28

  Lorenz invariance symmetry, of special relativity, 131, 208

  Low, Francis, 19

  luminosity, 208

  beams of colliding particles with a high intensity, 47, 52

  of colliding beams, 51

  of proton collisions, 108

  Maddox, John, 162

  magnetic fields, 87, 88

  magnetic induction, 16

  magnets, 49

  Maguiejo, João, 131, 188

  Maiani, Luciano, 13

  Mandelstam, Stanley, 25

  Mannheim, Philip, 106

  Marshak, Robert, 28

  Martin, Adam, 166

  Martin, Victoria, 193, 194

  Maskawa, Toshihide, 14

  mass difference, between neutrino or electron and top quark, 179

  masses: adjusted to fit experimental data, 141

  of elementary particles, 137

  photon acquiring an effective mass,
89

  of Stueckelberg’s scalar bosons, 143

  massive: intermediate charged vector boson, W, 84

  Kaluza-Klein, 22

  neutral Z particle, 145

  massless: gluons, strong force carried by, 16

  Goldstone bosons, 146

  photon field, 86, 89

  spin-0 particle, 85

  symmetric phase, in the early universe, 66, 145

  matrix, 57–58, 208

  matter: basic constituents of, 6

  progress toward understanding particle nature of, 34

  radioactive decay of, 16

  reductionist view of, 1. See also dark matter

  Maxwell, James Clerk, xi, 16, 32, 61

  Maxwell’s equations, 22–25, 62, 206

  Maxwell’s theory of electromagnetism, 185

  Meissner, Krzysztof, 186

  Meissner, Walther, 87

  Meissner effect, 87, 88–89

  Mercury, orbit of, 15

  mesons, 206–207, 208

  assigned to octets of SU(3), 27

  color combinations of, 13

  discovery of, 2

  with intrinsic quark spin 1, 159

  octets of, 4

  metric tensor field, in Riemannian geometry, 21

  Mexican hat picture, 92

  Michelson, Albert, 78, 208

  Michelson-Morley experiment, xiv, 208

  microcausality, 132, 133, 134

  microscopic objects of quantum mechanics, influencing one another, 134

  Milky Way galaxy, containing large void, 132

  millibarn (mb), 206

  Millikan, Robert, 33, 42

  millions of electron volts (MeV), xi

  Mills, Robert, 22, 24–25, 60, 65–66, 83

  Milner, Yuri Borisovich, 175

  mini black holes, ix, 77, 110

  minima in the ground state, breaking the basic SU(2) X U(1) symmetry, 185

  minimal supersymmetric standard model (MSSM), 163

  Minkowski, Herman, 61–62

  Minkowski light cone, 208–209

  Minkowski spacetime, 74

  Miransky, Vladimir, 126

  mixing angle, 128

  Miyamoto, Sigenore, 37

  Miyazawa, Hironari, 71

  modified gravity (MOG), 76, 132, 209

  momentum, of a particle, 38

  Monte Carlo method, 198

  Morley, Edward, 78, 208

  Moscow zero, 144

  multivariate analysis, 174

  multiverse, 182, 209

  multiverse model, solving naturalness problem, 180–184

  muon neutrino, 15

  muons, 2, 40, 42, 209

  Nambu, Yoichiro, 10, 85, 126

  Nambu-Goldstone theorem, 85

  naturalness criterion, paradigms satisfying, 176

  naturalness problem, 168, 179–184

  natural supersymmetry, 72

  natural universe, no unnatural fine-tunings, 184

  Neddermeyer, Seth, 2

  Ne’eman, Yuval, 2, 27, 60

  nucleons, 5

  neutralino, 209

  neutral K meson, 7

  neutrino energy, determining the missing, 192–193

  neutrinos, 2, 42, 155, 163, 209

  masses, 163, 186

  neutron, 209

  decay of, 16, 18

 

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