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Chapter 12: Q39E (page 557)

Sketch the Feynman diagram if the proposed decay is possible.

K+鈫�渭++v炉渭

Short Answer

Expert verified

The proposed decay is not possible.

Step by step solution

01

Given data

The proposed reaction is K+鈫�渭++v炉渭

02

Concept of Feynman diagram

Particle interactions can be represented as Feynman diagrams. Different types of lines are drawn in the diagrams.

03

Step 3:Find whether the charge is conserved

Conservation of charge is shown below:

K+鈫�渭++v炉渭(+e)鈫�(+e)+(0)(+e)鈫�(+e)

Thus, the charge before the decay and after the decay is equal.

Therefore, the charge is conserved.

04

Find conservation of mass

Conservation of mass is given below:

K+鈫�渭++v炉渭494MeV/c2鈫�106MeV/c2

The mass after the decay is 106MeV/c2 less than that of the initial mass 494MeV/c2.

05

Find conservation of lepton number

Conservation of lepton number:

K+鈫�渭++v炉渭(0)鈫�(-1)+(-1)(0)鈫�(-2)

The lepton number is not conserved.

Therefore, this decay is not possible.

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