Chapter 11, Problem 35P

### University Physics Volume 3

17th Edition
William Moebs + 1 other
ISBN: 9781938168185

### University Physics Volume 3

17th Edition
William Moebs + 1 other
ISBN: 9781938168185
Textbook Problem

# Which of the following decays cannot occur because die law of conservation of lepton number is violated? (a) n → p + e −      (e) π − → e − + v ¯ e (b) μ + → e + + v e     (f) μ − → e − + v ¯ e + v μ (c) π + → e + + v e + v ¯ μ    (g) Λ 0 → π − + p (d) p → n + e + + v e      (h) K + → μ + + v μ

To determine

(a)

Whether the decay can occur or not because of the violation of law of conservation of lepton number.

Explanation

The reaction of the decay is given by,

np+e

Here, the electron-lepton number of the neutron in the left side is 0 and the net electron-lepton number at the right side of the product is 1

To determine

(b)

Whether the decay can occur or not because of the violation of law of conservation of lepton number.

To determine

(c)

Whether the decay can occur or not because of the violation of law of conservation of lepton number.

To determine

(d)

Whether the decay can occur or not because of the violation of law of conservation of lepton number.

To determine

(e)

Whether the decay can occur or not because of the violation of law of conservation of lepton number.

To determine

(f)

Whether the decay can occur or not because of the violation of law of conservation of lepton number.

To determine

(g)

Whether the decay can occur or not because of the violation of law of conservation of lepton number.

To determine

(h)

Whether the decay can occur or not because of the violation of law of conservation of lepton number.

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