LAHLH
Mar4-10, 09:08 AM
Hi,
I think maybe my last question was too much of an essay for anybody to bother going through, so I thought I would ask something more modest:
In Srednicki chapter 14 fig 14.1, we have the counterm correction from A and B contributing to O(g^2), I understand it being here since A,B themselves are of O(g^2) so of course the 2 valent vertex they create is of this order in that diagram.
However Srednicki also includes this exact same diagram as his rightmost diagram for the ones contributing to O(g^4) aswell, how can it possibly be both orders?
Thanks again for any help, I really appreciate it. (this book is free to download on his webpage btw for anyone interested)
I think maybe my last question was too much of an essay for anybody to bother going through, so I thought I would ask something more modest:
In Srednicki chapter 14 fig 14.1, we have the counterm correction from A and B contributing to O(g^2), I understand it being here since A,B themselves are of O(g^2) so of course the 2 valent vertex they create is of this order in that diagram.
However Srednicki also includes this exact same diagram as his rightmost diagram for the ones contributing to O(g^4) aswell, how can it possibly be both orders?
Thanks again for any help, I really appreciate it. (this book is free to download on his webpage btw for anyone interested)