QFT 2 - Homework 1 Solution
January 30, 2014
1
To solve this problem, we need to calculate the propagator. We do this by rst calculating the
classical action. The classical path is:
xcl (t) = A cos !
QFT 2 - Homework 3 Solution
March 3, 2014
1
This is outlined in Peskin section 10.1.
To show that the amplitude for the four point diagram given by
k1
k3
k2
k4
is proportional to the four external mom
QFT 2 - Homework 1 Solution
February 13, 2014
1
1.1
We must assume that the derivative takes the form:
D=
ai
i
i
Then we see that we must have that, for some Grassmann variable i , we have
P (D (i ) =
Physics 444
1
Lecture 1
Winter 2014
Recap of scalar, spinor and vector elds
From last quarter, recall that we have constructed scalar, spinor and vector elds. To avoid complications
associated with ga
Physics 444
Lecture 8
Winter 2014
Renormalization: operator renormalization and log summation
In practical applications, we often wish to perform perturbation theory for a process occuring at a low sc
Physics 444
Lecture 7
Winter 2014
Renormalization: integrating out oshell modes
1
Integrating over a momentum shell
Consider a scalar (for simplicity) eld theory regulated by a cuto |kE | in Euclidean