Which Feynman diagram or diagrams include feasible processes?

[physicscal]

Homework Statement

Which Feynman diagram or diagrams include feasible processes?

Relevant Equations

Homework Help

Hello friends.
I couldn't do it. Which Feynman diagram or diagrams has include feasible process?

 

[Orodruin]

Define "feasible". Do you mean "allowed"? If so, think about what rules the vertices of a Feynman diagram need to satisfy.

 

[physicscal]

Yes. Possible process.

I see c) or d). But they are incorrect. Interesting I can't explain it.

 

[topsquark]

Yes. Possible process.

I see c) or d). But they are incorrect. Interesting I can't explain it.

Can you explain why you think these processes are possible/not possible?

-Dan

 

[physicscal]

We have seen lessons, I research again and again my notes. Just the c or d seems possible process on Feynman diagram. I did them unfortunately they're not correct. I still search on Feynman diagrams on internet. Just c and d nearby to be possible.

 

[Orodruin]

Please take the time to think about and to answer the question posed to you in #4. Your reply is not an answer to that question, but should contain a reasoning based on what you know about Feynman diagrams.

 

[physicscal]

Then, I have to explain all lesson about Feynman diagram )). Thank you.

 

[berkeman]

OP tried to delete his original question to close the thread, which is not allowed. Thread is closed now with the OP restored.