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Feynman diagram for sigma+ -> n + pi+

  • Thread starter makehhh
  • Start date
  • #1
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Homework Statement



Hello, I am trying to draw a Feynman Diagram at quark level for the decay sigma+ -> neutron + pi+.


Homework Equations



sigma+ -> neutron + pi+
uus -> udd + udbar


The Attempt at a Solution



Well, the attachment is what I came up with. I have no idea if it's right to be honest, I can't see anything wrong with it, but I have no idea how to be methodical about these kinds of drawings, and haven't found any particle physics texts to be much help.

Thanks for your help!
 

Attachments

Last edited:

Answers and Replies

  • #2
nicksauce
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Well I can't see your diagram yet, but I think the diagram requires both a W- boson and a Z boson in it.
 
Last edited:
  • #3
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At least a W- and then a Z or a gamma.
 
  • #4
nicksauce
Science Advisor
Homework Helper
1,272
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So I think your diagram looks OK, but maybe someone else would like to confirm it.
 
  • #5
nicksauce
Science Advisor
Homework Helper
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My alternative was:
 

Attachments

  • #6
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Ah, yes that looks good, thanks for your help guys, much appreciated.
 

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