Subatomic Physics

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19.8. References 607 (a) What is the rate/volume for the reaction i+j → a+b at the temperature T ? Express your answer in terms of the cross section σij for the reaction, and assume that i �= j. (b) In a real star, the velocities follow a Maxwell–Boltzmann distribution. How is the answer to part (a) altered in this case? 19.7. How is the lifetime of the Z 0 affected by the number of neutrino families? 19.8. Use Hubble’s law (Eq. 19.1) for the following: (a) Determine the approximate age of the universe and compare to Table 19.1. (b) In terms of the expansion of the universe, we can write Hubble’s law as � dR/dt� � = H0. R � now Under certain conditions, general relativity gives the relationship 8πGρR 2 =3kc 2 +3 � �2 dR , dt where G is the gravitational constant, ρ is the mean density of the universe, and k is a constant. For a “flat” universe k = 0. Determine the critical density in terms of H0 and G and evaluate it numerically. 19.9. What is the approximate minimum temperature necessary to allow pion production to occur? 19.10. What do you expect for the ratio of protons to neutrons at a temperature of 1.2 × 10 11 K? 19.11. As an example of the effect of CP or time reversal (T) nonconservation on particle and antiparticle decays, show that the rates for Σ + −→ pπ 0 and Σ − −→ pπ 0 are not equal to each other unless CP or T holds. 19.12. (a) Show that the rotational speeds of stars in galaxies should be given by: � GM(r) v(r) = r (19.18) where M(r) is the mass inside of a sphere of radius r.
608 Nuclear and Particle Astrophysics (b) Speeds are observed to be roughly independent of r, and luminous matter (stars) seem to be near the center of the galaxy. What does this imply? 19.13. Explain qualitatively why the WMAP data is sensitive to whether one assumes that dark matter is cold versus hot. [Hint: consider the evolution of a spot with higher-than-average density and a universe made with cold dark matter (low velocity and only reacting to gravity), hot dark matter (e.g. neutrinos), gas (nuclei and electrons making a plasma), and photons.] 19.14. Olber’s paradox: Consider a static infinite universe. Then consider a shell of radius r centered around the earth. While the observed brightness of the stars in this shell from earth would decrease like 1/r 2 , the number of stars would increase in the same proportion. Show that in a static infinite universe nights would be bright. Explain why this is not so.
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SUBAT MIC PHYSICS Third Edition
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SUBAT MIC PHYSICS Ernest M Henley A
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To Elaine and Viviana
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Acknowledgments In writing the pres
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Preface to the First Edition Subato
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Preface to the Third Edition Subato
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General Bibliography The reader of
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Contents Dedication v Acknowledgmen
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Contents xvii 6 Structure of Subato
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Contents xix 12.5 GeneralReferences
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Chapter 1 Background and Language H
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1.2. Units 3 1.2 Units Table 1.1: B
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1.3. Special Relativity, Feynman Di
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1.3. Special Relativity, Feynman Di
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1.4. References 9 Problems 1.1. ∗
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Part I Tools One of the most frustr
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Chapter 2 Accelerators 2.1 Why Acce
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2.1. Why Accelerators? 15 particle
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2.2. Cross Sections and Luminosity
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2.3. Electrostatic Generators (Van
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2.4. Linear Accelerators (Linacs) 2
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2.5. Beam Optics 23 Figure 2.8: Rec
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2.6. Synchrotrons 25 Figure 2.10: E
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2.6. Synchrotrons 27 Photo 3: The p
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2.7. Laboratory and Center-of-Momen
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2.8. Colliding Beams 31 or with Eqs
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2.10. Beam Storage and Cooling 33 l
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2.11. References 35 and in E. Byckl
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2.11. References 37 (b) Extreme rel
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Chapter 3 Passage of Radiation Thro
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3.2. Heavy Charged Particles 41 Fig
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3.2. Heavy Charged Particles 43 −
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3.3. Photons 45 Equation (3.2) also
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3.4. Electrons 47 Figure 3.8: Passa
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3.5. Nuclear Interactions 49 Figure
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3.6. References 51 3.8. A beam of 1
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Chapter 4 Detectors What would a ph
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4.1. Scintillation Counters 55 The
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4.2. Statistical Aspects 57 Or, to
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4.3. Semiconductor Detectors 59 kno
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4.3. Semiconductor Detectors 61 Fig
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4.4. Bubble Chambers 63 Photo 5: Bu
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4.6. Wire Chambers 65 voltage suppl
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4.8. Time Projection Chambers 67 Fi
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4.10. Calorimeters 69 Figure 4.18:
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4.11. Counter Electronics 71 Figure
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4.13. References 73 Table 4.1: Func
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4.13. References 75 4.6. Sketch the
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Part II Particles and Nuclei The si
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Chapter 5 The Subatomic Zoo A conve
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5.1. Mass and Spin. Fermions and Bo
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5.1. Mass and Spin. Fermions and Bo
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5.2. Electric Charge and Magnetic D
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5.3. Mass Measurements 87 Figure 5.
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5.3. Mass Measurements 89 Figure 5.
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5.3. Mass Measurements 91 Earlier,
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5.4. A First Glance at the Subatomi
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5.5. Gauge Bosons 95 Figure 5.13: A
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5.6. Leptons 97 to its momentum, re
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5.7. Decays 99 Figure 5.15: Exponen
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5.7. Decays 101 The function g(ω)
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5.8. Mesons 103 5.8 Mesons Table 5.
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5.9. Baryon Ground States 105 Japan
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5.9. Baryon Ground States 107 neutr
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5.10. Particles and Antiparticles 1
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5.10. Particles and Antiparticles 1
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5.11. Quarks, Gluons, and Intermedi
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5.12. Excited States and Resonances
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5.12. Excited States and Resonances
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5.13. Excited States of Baryons 123
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5.14. References 129 in Section 5.5
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5.14. References 131 5.14. Use the
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5.14. References 133 5.32. ∗ What
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Chapter 6 Structure of Subatomic Pa
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6.2. Rutherford and Mott Scattering
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6.2. Rutherford and Mott Scattering
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6.3. Form Factors 141 The scatterin
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6.4. The Charge Distribution of Sph
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6.4. The Charge Distribution of Sph
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6.5. Leptons Are Point Particles 14
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6.6. Nucleon Elastic Form Factors 1
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6.8. Inelastic Electron and Muon Sc
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6.8. Inelastic Electron and Muon Sc
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6.9. Deep Inelastic Electron Scatte
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6.10. Quark-Parton Model for Deep I
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6.11. More Details on Scattering an
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6.12. References 189 Some character
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6.12. References 191 (c) Show that
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6.12. References 193 6.23. Show tha
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Part III Symmetries and Conservatio
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Chapter 7 Additive Conservation Law
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7.1. Conserved Quantities and Symme
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7.1. Conserved Quantities and Symme
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7.2. The Electric Charge 203 7.2 Th
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7.2. The Electric Charge 205 or [Q,
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7.3. The Baryon Number 207 antineut
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7.4. Lepton and Lepton Flavor Numbe
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7.5. Strangeness Flavor 211 all bel
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7.5. Strangeness Flavor 213 Positiv
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7.6. Additive Quantum Numbers of Qu
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7.7. References 217 There are also
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7.7. References 219 7.12. Follow th
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Chapter 8 Angular Momentum and Isos
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8.2. Symmetry Breaking by a Magneti
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8.4. The Nucleon Isospin 225 8.4 Th
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8.5. Isospin Invariance 227 magneti
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8.6. Isospin of Particles 229 the v
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8.6. Isospin of Particles 231 The a
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8.7. Isospin in Nuclei 233 If the e
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8.8. References 235 Isospin doublet
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8.8. References 237 8.4. Verify the
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Chapter 9 P , C, CP, andT In the pr
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9.1. The Parity Operation 241 P is
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9.2. The Intrinsic Parities of Suba
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9.2. The Intrinsic Parities of Suba
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9.3. Conservation and Breakdown of
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9.4. Charge Conjugation 253 “Is t
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9.4. Charge Conjugation 255 The π
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9.5. Time Reversal 257 if Tψ(t) an
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9.5. Time Reversal 259 found to be
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9.6. The Two-State Problem 261 Hami
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9.7. The Neutral Kaons 263 9.7 The
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9.7. The Neutral Kaons 265 3. The s
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9.7. The Neutral Kaons 267 and only
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9.8. The Fall of CP Invariance 269
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9.9. References 271 • There are t
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9.9. References 273 9.8. * Find inf
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9.9. References 275 9.27. Assume th
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9.9. References 277 9.39. Compare t
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Part IV Interactions In the previou
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Chapter 10 The Electromagnetic Inte
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10.1. The Golden Rule 283 Schrödin
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10.1. The Golden Rule 285 where it
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10.2. Phase Space 287 Figure 10.4:
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10.3. The Classical Electromagnetic
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10.3. The Classical Electromagnetic
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10.4. Photon Emission 293 is a twof
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10.4. Photon Emission 295 the form
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10.4. Photon Emission 297 where V (
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10.5. Multipole Radiation 299 The t
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10.5. Multipole Radiation 301 Figur
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10.6. Electromagnetic Scattering of
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10.6. Electromagnetic Scattering of
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10.7. Vector Mesons as Mediators of
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10.7. Vector Mesons as Mediators of
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10.8. Colliding Beams 311 10.8 Coll
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10.8. Colliding Beams 313 Figure 10
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10.9. Electron-Positron Collisions
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10.10. The Photon-Hadron Interactio
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10.11. Magnetic Monopoles 323 The s
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10.12. References 325 Quantum Elect
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10.12. References 327 (b) Compare t
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10.12. References 329 (a) How would
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Chapter 11 The Weak Interaction Thi
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11.1. The Continuous Beta Spectrum
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11.2. Beta Decay Lifetimes 335 The
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11.3. The Current-Current Interacti
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11.4. A Variety of Weak Processes 3
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11.4. A Variety of Weak Processes 3
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11.5. The Muon Decay 347 Linac Pion
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11.6. The Weak Current of Leptons 3
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11.6. The Weak Current of Leptons 3
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11.7. Chirality versus Helicity 353
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11.9. Weak Decays of Quarks and the
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11.10. Weak Currents in Nuclear Phy
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11.10. Weak Currents in Nuclear Phy
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11.11. Inverse Beta Decay: Reines a
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11.12. Massive Neutrinos 363 11.12
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11.13. Majorana versus Dirac Neutri
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11.14. The Weak Current of Hadrons
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11.15. References 375 11.15 Referen
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11.15. References 377 11.5. Beta sp
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11.15. References 379 (b) * Discuss
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11.15. References 381 11.41. For nu
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Chapter 12 Introduction to Gauge Th
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12.1. Introduction 385 D0 ≡ 1 ∂
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12.2. Potentials in Quantum Mechani
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12.3. Gauge Invariance for Non-Abel
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12.3. Gauge Invariance for Non-Abel
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12.4. The Higgs Mechanism; Spontane
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12.5. General References 401 12.5 G
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Chapter 13 The Electroweak Theory o
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13.2. The Gauge Bosons and Weak Iso
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13.2. The Gauge Bosons and Weak Iso
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13.3. The Electroweak Interaction 4
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13.4. Tests of the Standard Model 4
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13.4. Tests of the Standard Model 4
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13.5. References 419 Physics. 112,
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Chapter 14 Strong Interactions All
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14.1. Range and Strength of the Low
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14.2. The Pion-Nucleon Interaction
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14.3. The Form of the Pion-Nucleon
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14.4. The Yukawa Theory of Nuclear
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14.5. Low-Energy Nucleon-Nucleon Fo
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14.6. Meson Theory of the Nucleon-N
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14.7. Strong Processes at High Ener
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14.8. The Standard Model, Quantum C
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14.9. QCD at Low Energies 457 An ex
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14.10. Grand Unified Theories, Supe
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14.11. References 461 and Partons,
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14.11. References 463 Fig. 14.28 14
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14.11. References 465 14.25. The lo
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14.11. References 467 (b) What comb
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Part V Models “A model is like an
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Chapter 15 Quark Models of Mesons a
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15.2. Quarks as Building Blocks of
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15.4. Mesons as Bound Quark States
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15.4. Mesons as Bound Quark States
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15.5. Baryons as Bound Quark States
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15.6. The Hadron Masses 481 Figure
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15.7. QCD and Quark Models of the H
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15.8. Heavy Mesons: Charmonium, Ups
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15.9. Outlook and Problems 493 wher
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15.10. References 495 On a more adv
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15.10. References 497 where J± = J
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15.10. References 499 (b) Apply the
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Chapter 16 Liquid Drop Model, Fermi
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16.1. The Liquid Drop Model 503 Fig
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16.1. The Liquid Drop Model 505 Bey
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16.2. The Fermi Gas Model 507 N = V
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E/A(MeV) 16.3. Heavy Ion Reactions
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16.4. Relativistic Heavy Ion Collis
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16.4. Relativistic Heavy Ion Collis
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16.5. References 515 medium (i.e. s
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16.5. References 517 16.12. Symmetr
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16.5. References 519 16.25. At RHIC
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Chapter 17 The Shell Model The liqu
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17.1. The Magic Numbers 523 The res
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17.2. The Closed Shells 525 solved
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17.2. The Closed Shells 527 Figure
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17.3. The Spin-Orbit Interaction 52
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17.4. The Single-Particle Shell Mod
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17.5. Generalization of the Single-
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17.6. Isobaric Analog Resonances 53
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17.7. Nuclei Far From the Valley of
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17.8. References 539 An elementary
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17.8. References 541 (b) N odd. (c)
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Chapter 18 Collective Model Althoug
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18.1. Nuclear Deformations 545 spin
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18.2. Rotational Spectra of Spinles
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18.2. Rotational Spectra of Spinles
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18.3. Rotational Families 551 A spi
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18.3. Rotational Families 553 2. Th
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18.4. One-Particle Motion in Deform
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Page 580 and 581: 18.5. Vibrational States in Spheric
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Page 584 and 585: 18.6. The Interacting Boson Model 5
Page 586 and 587: 18.7. Highly Excited States; Giant
Page 588 and 589: 18.8. Nuclear Models—Concluding R
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Page 594 and 595: 18.9. References 573 18.13. Verify
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Page 598 and 599: 18.9. References 577 18.51. (a) In
Page 600 and 601: Chapter 19 Nuclear and Particle Ast
Page 602 and 603: 19.1. The Beginning of the Universe
Page 604 and 605: 19.1. The Beginning of the Universe
Page 606 and 607: 19.2. Primordial Nucleosynthesis 58
Page 608 and 609: 19.3. Stellar Energy and Nucleosynt
Page 614 and 615: 19.4. Stellar Collapse and Neutron
Page 616 and 617: 19.4. Stellar Collapse and Neutron
Page 618 and 619: 19.5. Cosmic Rays 597 We are consta
Page 620 and 621: 19.5. Cosmic Rays 599 Figure 19.11:
Page 622 and 623: 19.6. Neutrino Astronomy and Cosmol
Page 624 and 625: 19.8. References 603 baryon excess
Page 626 and 627: 19.8. References 605 Neutron Stars
Page 630 and 631: Index Abundance, 585-586 Accelerato
Page 632 and 633: Index 611 drift chambers, 66-67 ele
Page 634 and 635: Index 613 diagrams, 279 electromagn
Page 636 and 637: Index 615 outlook, 567 Nuclear stru
Page 638 and 639: Index 617 poles, 494 recurrences, 4
Page 640 and 641: Index 619 TCP theorem, 269, 448 Tem
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