- #1
thatboi
- 133
- 18
Hi all,
I am currently reading through Peskin's QFT book and have a question regarding an equation that seems very simple in nature:
On page 121, below equation (4.121), there is an equation
##(p'-p)^2 = -|\textbf{p}'-\textbf{p}|^2 + \mathcal{O}(\textbf{p}^4)##
I was just wondering where exactly the higher powers in ##\textbf{p}## came from?
Thanks.
I am currently reading through Peskin's QFT book and have a question regarding an equation that seems very simple in nature:
On page 121, below equation (4.121), there is an equation
##(p'-p)^2 = -|\textbf{p}'-\textbf{p}|^2 + \mathcal{O}(\textbf{p}^4)##
I was just wondering where exactly the higher powers in ##\textbf{p}## came from?
Thanks.
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