An electron cannot decay into two neutrinos. Which of the following conservation
ID: 1998051 • Letter: A
Question
An electron cannot decay into two neutrinos. Which of the following conservation laws would have to be violated?
a.
Energy only.
b.
Angular momentum only.
c.
Charge only.
d.
Lepton number only.
e.
Linear momentum only.
f.
Charge and lepton number only.
g.
Angular momentum, charge and lepton number only.
h.
Angular momentum, linear momentum, charge and lepton number.
i.
Angular momentum and charge only.
a.
Energy only.
b.
Angular momentum only.
c.
Charge only.
d.
Lepton number only.
e.
Linear momentum only.
f.
Charge and lepton number only.
g.
Angular momentum, charge and lepton number only.
h.
Angular momentum, linear momentum, charge and lepton number.
i.
Angular momentum and charge only.
Explanation / Answer
The correct option is f.
The conservation of charge is violated, since the electron is a negatively charged particle and the neutrinos are uncharged particles.
The conservation of lepton number is violated. The electron and neutrinos are leptons. on both sides of the nuclear reaction the lepton number must be constant.
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