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Chapter 12: Q32E (page 557)

(a) Determine the quark content of the antineutrons.

(b) Sketch the Feynman diagram for its 尾 decay.

Short Answer

Expert verified

(a) The antineutron must be made ofu炉d炉d炉.

(b) The Feynman diagram is shown in the figure as:

Step by step solution

01

Given data 

The quark content of neutron isudd.

02

Concept of Feynman diagram

A Feynman diagram describes the interactions in quantum field theory. Solid lines, and curved lines are used to represent different types of particle interactions.

03

Step 3:Determine the quark content of the antineutrons 

(a)

We know that the quark content of neutron isudd.

This implies that the quark content of antineutron must beu炉d炉d炉.

The antineutron must be made of u炉d炉d炉.

04

Sketch Feynman vertex

(b)

The Feynman diagram is shown in figure 1.

Figure 1

This looks like the neutron decay diagram, except all the particles are changed to their antiparticle partners.

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