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Standard Model - Quiz
Contributed by: Appleby
  • 1. How many fundamental interactions are described by the Standard Model?
A) Five
B) Three
C) Four
D) Two
  • 2. Which fundamental interaction is not explained by the Standard Model?
A) Electromagnetism
B) Weak interaction
C) Strong interaction
D) Gravity
  • 3. What are particles that mediate interactions called?
A) Quarks
B) Leptons
C) Force carriers
D) Fermions
  • 4. What mediates the electromagnetic force?
A) W boson
B) Gluon
C) Photon
D) Z boson
  • 5. What mediates the strong interaction?
A) Z boson
B) Photon
C) W boson
D) Gluon
  • 6. Why is gravity excluded from the Standard Model?
A) It lacks a mediating particle
B) It is not a fundamental force
C) Contradictions between general relativity and quantum mechanics
D) It is too strong
  • 7. What is the postulated mediating particle for gravity?
A) Photon
B) Z boson
C) Gluon
D) Graviton
  • 8. Which force is the only long-range force in the Standard Model?
A) Weak interaction
B) Strong interaction
C) Electromagnetism
D) Gravity
  • 9. What theory describes electromagnetic interactions in the Standard Model?
A) Quantum electrodynamics
B) Electroweak theory
C) Quantum chromodynamics
D) General relativity
  • 10. What type of particles mediate the weak interaction?
A) Gravitons and photons
B) Photons and gluons
C) W and Z bosons
D) Gluons and gravitons
  • 11. Why is the weak interaction short-range?
A) W and Z bosons have mass
B) It does not interact with charge
C) It is only for neutrinos
D) It violates parity
  • 12. What do W boson interactions change?
A) Particle flavor and charge
B) Nothing, they are neutral
C) Only particle spin
D) Only particle mass
  • 13. What type of interaction is mediated by W bosons?
A) Gravitational interactions
B) Neutral current interactions
C) Electromagnetic interactions
D) Charged current interactions
  • 14. What type of interaction is mediated by Z bosons?
A) Neutral current interactions
B) Charged current interactions
C) Strong interactions
D) Electromagnetic interactions
  • 15. Which interaction violates parity and CP?
A) Gravity
B) Electromagnetism
C) Weak interaction
D) Strong interaction
  • 16. At high energies, the weak interaction unites with which other force?
A) Strong
B) Electromagnetic
C) Gravity
D) Nuclear
  • 17. What is the result of the union of weak and electromagnetic interactions?
A) Quantum gravity
B) Electroweak interaction
C) Standard force
D) Unified field theory
  • 18. With which particles do Z bosons interact, similar to photons?
A) Neutrinos
B) Protons
C) Gluons
D) Gravitons
  • 19. Who theorized the Higgs particle in 1964?
A) Stephen Hawking
B) Albert Einstein
C) Peter Higgs
D) Richard Feynman
  • 20. What is the approximate mass of the Higgs boson confirmed in 2012?
A) 125 GeV/c2
B) 133 proton masses
C) 7 TeV/c2
D) 1.4 TeV/c2
  • 21. Which particle accelerator was designed to collide two 7 TeV proton beams?
A) CERN
B) ATLAS
C) LHC
D) Tevatron
  • 22. When did experiments at Fermilab's Tevatron close?
A) Late 2011
B) March 2013
C) Early 2010
D) July 2012
  • 23. What does the Higgs boson interact with because it is massive?
A) Gravity
B) Only photons
C) Itself
D) Only quarks
  • 24. What is the approximate mass of the Higgs boson in terms of proton masses?
A) 125
B) 10
C) 1000
D) 133
  • 25. Goldstone's theorem concerns which type of symmetry?
A) Broken parity
B) Discrete symmetry
C) Generic continuous symmetry
D) Supersymmetry
  • 26. The Higgs boson is a key building block of which model?
A) String Theory
B) Atomic Model
C) General Relativity
D) Standard Model
  • 27. Above what energy level must the Higgs mechanism become visible for mathematical consistency?
A) 125 GeV
B) 10-25 kg
C) 7 TeV
D) 1.4 TeV
  • 28. What happens to the Higgs boson shortly after it is created?
A) It becomes stable
B) It grows in mass
C) It decays
D) It becomes a photon
  • 29. In what year was the Higgs boson discovered?
A) 2000
B) 1975
C) 2012
D) 1995
  • 30. Which particle was confirmed in 1995?
A) Bottom quark
B) Charm quark
C) Top quark
D) Tau neutrino
  • 31. Who introduced the Dirac equation in 1928?
A) Paul Dirac
B) Murray Gell-Mann
C) Sheldon Glashow
D) Steven Weinberg
  • 32. Who demonstrated that parity was not conserved in the weak interaction in 1957?
A) Abdus Salam
B) Chien-Shiung Wu
C) Sheldon Glashow
D) Steven Weinberg
  • 33. Which concept describes non-Abelian gauge theories having freedom at high energies?
A) Asymptotic freedom
B) Spontaneous symmetry breaking
C) Renormalization
D) Parity violation
  • 34. Who discovered the tau lepton in 1976?
A) Leon Lederman
B) Abraham Pais
C) Martin Perl
D) Gerard 't Hooft
  • 35. Who discovered the bottom quark in 1977?
A) Steven Weinberg
B) Sheldon Glashow
C) Martin Perl
D) Leon Lederman
  • 36. In what year were the W and Z bosons discovered?
A) 1983
B) 1995
C) 1979
D) 1973
  • 37. What property of neutrinos is not incorporated in the Standard Model without modifications?
A) Existence of quarks
B) Weak neutral currents
C) Neutrino oscillation
D) Asymptotic freedom
  • 38. What is one phenomenon that the Standard Model fails to explain?
A) Existence of leptons
B) W boson mass
C) Dark energy
D) Electromagnetic interactions
  • 39. Which of the following is an example of an exotic model used to explain dark matter?
A) Renormalization
B) Quantum electrodynamics
C) Asymptotic freedom
D) Supersymmetry
  • 40. Who showed in 1971 that gauge theories could be renormalized?
A) Gerard 't Hooft
B) Steven Weinberg
C) Sheldon Glashow
D) Abdus Salam
  • 41. How many elementary particles of spin 1/2 are included in the Standard Model?
A) 12
B) 24
C) 6
D) 18
  • 42. What principle do fermions respect regarding the occupancy of quantum states?
A) Conservation of mass
B) Heisenberg uncertainty principle
C) Color confinement
D) Pauli exclusion principle
  • 43. Which particles comprise all of ordinary baryonic matter?
A) First-generation particles
B) Third-generation particles
C) All neutrinos
D) Second-generation particles
  • 44. What is the common name for an anti-electron?
A) Neutron
B) Proton
C) Positron
D) Muon
  • 45. What is the result of color confinement for quarks?
A) They decay into electrons
B) They become leptons
C) They exist only as isolated particles
D) They must bind into color-neutral hadrons
  • 46. What are hadrons containing three quarks called?
A) Neutrinos
B) Leptons
C) Mesons
D) Baryons
  • 47. What are hadrons containing a quark-antiquark pair called?
A) Baryons
B) Leptons
C) Nucleons
D) Mesons
  • 48. Which group of particles does not carry color charge?
A) Hadrons
B) Leptons
C) Baryons
D) Quarks
  • 49. What is the electric charge of the three charged leptons?
A) +2/3 e
B) -1 e
C) +1 e
D) 0 e
  • 50. What determines the interactions of fermions?
A) Their half-life
B) Their spin direction
C) Their generation number
D) The charges they carry
  • 51. What is the mass of the photon?
A) Massless
B) High mass
C) 1 MeV
D) Variable mass
  • 52. How many distinct gluons are there?
A) Eight
B) Four
C) Six
D) Twelve
  • 53. What particles are bound together by the strong interaction?
A) Leptons
B) Photons
C) Neutrinos
D) Quarks
  • 54. What are the graphical representations of perturbation theory called?
A) Interaction maps
B) Color-charge charts
C) Feynman diagrams
D) Schrodinger plots
  • 55. How many parameters define the dynamics of the Standard Model Lagrangian?
A) 8
B) 24
C) 12
D) 19
  • 56. What matrices are used as generators of the SU(3) color group?
A) Dirac matrices
B) Gell-Mann matrices
C) Pauli matrices
D) Gamma matrices
  • 57. What is the result of Yukawa-type interactions with the Higgs field?
A) Fermion masses
B) Color charge
C) Spin orientation
D) Gauge boson masses
  • 58. In the potential V(φ), what is the requirement for μ²?
A) μ² > 0
B) μ² < 0
C) μ² = 0
D) μ² = 1
  • 59. Why must λ be greater than zero in the Higgs potential?
A) To define the symmetry breaking scale
B) To maintain the complex nature of the field
C) To ensure the potential is bounded from below
D) To generate masses for the gauge fields
  • 60. What describes the self-interactions of the scalar field φ?
A) The quartic term
B) The electroweak gauge covariant derivative
C) The vacuum expectation value
D) The kinetic term
  • 61. At what value of φ†φ does the minimum of the potential occur?
A) μ²/2λ
B) μ²/λ
C) μ/λ
D) 2μ²/λ
  • 62. What is the formula for the Higgs boson mass?
A) 1/2 gv
B) μ²/2λ
C) 1/2 sqrt(g²+g'²)v
D) sqrt(2λ)v
  • 63. What is the size of the Yukawa coupling matrices Y_u, Y_d, and Y_e?
A) 2x2
B) 1x3
C) 4x4
D) 3x3
  • 64. What does the symbol h.c. represent in the Yukawa Lagrangian?
A) Higgs coupling
B) Hermitian conjugate
C) Horizontal component
D) Hidden constant
  • 65. What is the charge conjugate state of the Higgs doublet denoted as?
A) φ_L
B) φ_R
C) φ~
D) φ*
  • 66. What do the subscripts m and n in the Yukawa matrices (Y)_mn represent?
A) Color indices
B) Spin states
C) Generations
D) Gauge charges
  • 67. Which field is identified as a left-handed quark doublet?
A) e_R
B) Q_L
C) d_R
D) u_R
  • 68. What is the mathematical definition provided for the charge conjugate Higgs state φ~?
A) τ_2φ*
B) τ_2φ
C) iτ_2φ
D) iτ_2φ*
  • 69. What particles mediate the strong interaction?
A) W bosons
B) Higgs bosons
C) Photons
D) Gluons
  • 70. What property of the strong force means only color-neutral particles exist in isolation?
A) Asymptotic freedom
B) Quantization
C) Superposition
D) Confinement
  • 71. Which particle is given as an example of a meson mediating the nuclear force?
A) Top quark
B) Gluon
C) W boson
D) Pion
  • 72. Which of the following is NOT mentioned as a particle predicted by the Standard Model?
A) Top quark
B) Higgs boson
C) Muon
D) Charm quark
  • 73. Where was the Higgs boson discovered?
A) Fermilab
B) CERN's LEP
C) Large Hadron Collider
D) Stanford Linear Accelerator
  • 74. What mechanism naturally incorporates neutrino mass by adding heavy right-handed neutrinos?
A) The seesaw mechanism.
B) The inflationary model.
C) The lattice gauge theory.
D) The Higgs mechanism.
  • 75. What problem arises from the Higgs mechanism when new physics is present at high energy scales?
A) The Yang-Mills gap.
B) The dark matter problem.
C) The hierarchy problem.
D) The matter-antimatter asymmetry.
  • 76. What is required to keep the weak scale much smaller than the Planck scale in the presence of high-energy physics?
A) The removal of all leptons.
B) The use of 100 constants.
C) Severe fine tuning of the parameters.
D) The elimination of the Higgs boson.
  • 77. What phenomenon regarding matter does the Standard Model fail to accommodate?
A) The existence of neutrinos.
B) The gravitational constant.
C) Matter/antimatter asymmetry.
D) The stability of the Higgs boson.
  • 78. Which mechanism is mentioned as a potential requirement for explaining the isotropy and homogeneity of the universe?
A) Lattice gauge theory.
B) The seesaw mechanism.
C) General relativity.
D) Cosmic inflation.
  • 79. Which author wrote the textbook 'An Introduction to Particle Physics and the Standard Model'?
A) Robert Mann
B) Paul Langacker
C) Matthew D. Schwartz
D) D.J. Griffiths
  • 80. The textbook by T.P. Cheng and L.F. Li focuses primarily on which aspect of the Standard Model?
A) Gauge theory
B) History of physics
C) Phenomenology
D) Experimental particle decay
  • 81. Paul Langacker's 'The Standard Model and Beyond' emphasizes which theoretical framework?
A) Quantum gravity
B) Condensed matter physics
C) Group theory
D) String theory
  • 82. Which journal article discusses the electroweak fit of the Standard Model following the discovery of a new boson at the LHC?
A) S.F. Novaes
B) E.S. Abers and B.W. Lee
C) M. Baak et al.
D) Y. Hayato et al.
  • 83. What is the primary subject of the article by Y. Hayato et al. published in 1999?
A) Weak interaction gauge theory
B) Proton decay
C) Group theory foundations
D) Higgs boson discovery
  • 84. Who authored the 1987 textbook 'Introduction to Elementary Particles'?
A) Andrzej Buras
B) D.J. Griffiths
C) Robert Mann
D) Matthew D. Schwartz
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