Question

a) Draw the lowest-order Feynman diagram for the process e+ + ?? ? e+ + ??. How many diagrams are there? b) Using the Feynman rules for QED, set up the formula for the matrix element for the t-channel diagram for e+ + ?? ? e+ + ??. Just write down the diagram, do not perform the integration at this point. Feynman rules are given on the last page of the exam. c) Now perform the integration and calculate the matrix element. Don't plug in any traces yet.

          a) Draw the lowest-order Feynman diagram for the process
e+ + ?? ? e+ + ??. How many diagrams are there?

b) Using the Feynman rules for QED, set up the formula for the matrix
element for the t-channel diagram for e+ + ?? ? e+ + ??. Just write
down the diagram, do not perform the integration at this point.
Feynman rules are given on the last page of the exam.

c) Now perform the integration and calculate the matrix element. Don't
plug in any traces yet.

a) Draw the lowest-order Feynman diagram for the process
e+ + ?? ? e+ + ??. How many diagrams are there?

b) Using the Feynman rules for QED, set up the formula for the matrix
element for the t-channel diagram for e+ + ?? ? e+ + ??. Just write
down the diagram, do not perform the integration at this point.
Feynman rules are given on the last page of the exam.

c) Now perform the integration and calculate the matrix element. Don't
plug in any traces yet.

Added by Adriana V.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Frank Deng

05/09/2022

Step 1

Step 1:** The lowest-order Feynman diagram for the process \(e^+ + p \rightarrow \mu^+ + \mu^-\) is shown below: \[ \begin{tikzpicture} \begin{feynman} \vertex (a) {\(e^+\)}; \vertex[right=2cm of a] (b); \vertex[right=2cm of b] (c) {\(\mu^+\)}; \vertex[below=1cm Show more…

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a) Draw the lowest-order Feynman diagram for the process e+ + μ− → e+ + μ−. How many diagrams are there? b) Using the Feynman rules for QED, set up the formula for the matrix element for the t-channel diagram for e+ + μ− → e+ + μ−. Just write down the diagram, do not perform the integration at this point. Feynman rules are given on the last page of the exam. c) Now perform the integration and calculate the matrix element. Don't plug in any traces yet.