# Homework Help: Problem 6.2 in Peskin's QFT book

1. Jan 7, 2010

### kprkpr

1. The problem statement, all variables and given/known data
In fact this is not homework, I'm self-studying QFT by reading Peskin's book, and I'm stuck with Problem 6.2.

2. Relevant equations
In part (e), I cannot get the factor (1+(1-x)2)/x in the cross section.

3. The attempt at a solution
Maybe I'd already been wrong in earlier parts, the result I got in part (b) is C~D~$$\sqrt{EE'}\theta$$,
and the probability I got in part (c) is ~ $$\frac{1}{EE'\theta^2}$$