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Particle: Lecture 2 - Statistics
General Stats
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This quiz has been taken 9 times
7 since last reset
- The average score is 28 of 28
Answer Stats
| Hint | Answer | % Correct |
|---|---|---|
| Define the baryon number in terms of number of quarks and antiquarks, defined as q and p respectively | 1/3 * (q-p) | 100%
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| Express P-parities in terms of L and intrinsic P-parities | (-1)^(L)*(P intrinsic) | 100%
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| Express C-parities in terms of L and S for a fermion-antifermion pair | (-1)^(L+S) | 100%
|
| What is the magnitude of a lepton's spin (generally)? | A half-integer | 100%
|
| What is the magnitude of a boson's spin (generally) ? | An integer | 100%
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| Define the spin of a particle | A particle’s angular momentum in its own rest frame. | 100%
|
| List all internal quantum numbers | Charge, Baryon number and Lepton number | 100%
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| Give an example for a plane wave of a fermion (in terms of q, r and h bar) | e^(i(q.r)/h bar) | 100%
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| True or false: The lepton number for leptons and antileptons is the same? | False | 100%
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| What is the time in this S' frame? Give your answer in terms of a generic x, gamma, v, c and t | (gamma)(t-(x*v)/(c^2)) | 100%
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| If we are in a frame S we are travelling in the x-direction at relativistic speeds what is our distance travelled in the S' frame? Give your answer in terms of a generic x, gamma, v and t | (gamma)(x-vt) | 100%
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| What is g in a calculation for the potential of a weak interaction? | Generic coupling constant | 100%
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| In layman's terms describe what a Born-approximation shows | How much of the particle’s wave function overlaps with the potential | 100%
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| Express J^2 in terms of J and h bar | J(J+1)(h bar)^2 | 100%
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| How do we obtain the potential? | Klein-Gordon equation | 100%
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| What are the smallest and largest values of total angular momentum (in terms of L and S)? | |L-S| and L+S | 100%
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| Finish this sentence: The ____ __ the ________ particle is equal to the _________ ____ of the decay products. | mass of, decaying and invariant mass | 100%
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| Finish the sentence: CP violation causes a ______-__________ _________. | matter, antimatter and asymmetry | 100%
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| Express J_z in terms of M and h bar | M(h bar) | 100%
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| Give the definition of the invariant mass | sqrt((E^2-p^2*c^2)/c^4) | 100%
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| Finish Noether's first theorem: Every differentiable ________ of the ______ __ _ ________ ______ has a corresponding ____________ ___. | symmetry, action of a physical system and conservation law | 100%
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| What does q represent in the above equation? | The momentum transferred to the fermion | 100%
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| What is needed to calculate the interaction probability? | The potential | 100%
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| What is the relationship for the probability of a process to occur with its constant at the vertex in question? | The probability is proportional to the constant squared | 100%
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| True or false: Fermions and antifermions have opposite intrinsic parities? | True | 100%
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| True or false: All these internal quantum numbers are always conserved? | True | 100%
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| True or false: Bosons have even wave functions and leptons have odd wave functions? | True | 100%
|
| What is the mass of a photon? | Zero | 100%
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