Exam-style question
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In a particle decay process, if the initial lepton number is 1 and the final lepton number is 0, what can be inferred?.
- A.Lepton number is conserved.
- B.Lepton number is not conserved.
- C.Leptons have been created.
- D.Leptons have been destroyed.
Model answer
What a good answer should say
- Lepton number is not conserved.
Explanation
Why this works
The lepton number must remain constant in particle interactions. A decrease from 1 to 0 indicates that leptons have been destroyed, violating the conservation of lepton number.
Common mistake
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