A S-Matrix in Quantum Field Theory

Click For Summary
The S-matrix is essential for computing scattering amplitudes in quantum field theory. While it is possible to use a field like ##\phi(x,t)## to compute these amplitudes, mastering the S-matrix requires extensive study, typically through dedicated courses or textbooks. General discussions on this topic are insufficient for in-depth understanding, and specific questions should follow a thorough review of the material. Engaging with resources like Peskin & Schroeder is recommended for foundational knowledge. Overall, a PF thread cannot replace comprehensive learning in S-matrix theory.
gremory
Messages
3
Reaction score
0
TL;DR
Usage of the S-matrix
Hello, i need help with the S-matrix. From what i understand, with the S-matrix i would be able to compute the scattering amplitude of some processes, is that correct? If so, how would i be able to do that if i have some field ##\phi(x,t)## in hands? Is that possible?
 
Physics news on Phys.org
Study Peskin & Schroeder... :rolleyes:
 
gremory said:
i need help with the S-matrix.
That is more help than is within the scope of a PF thread. You are basically asking for a course in S matrix theory, and for that you need a textbook (such as the one @strangerep suggested), not a PF thread.

gremory said:
From what i understand, with the S-matrix i would be able to compute the scattering amplitude of some processes, is that correct?
Yes. However...

gremory said:
If so, how would i be able to do that if i have some field ##\phi(x,t)## in hands? Is that possible?
It's certainly possible, but as above, learning how to do it takes one or more full-time courses in S-matrix theory. It's not something we're going to be able to teach you in a PF thread.

If, after taking some time to study a textbook, you have particular questions about what you are reading, by all means open a new thread with a much more specific focus. In the meantime, this thread is closed.
 
  • Like
Likes vanhees71 and strangerep

Thread 'Angular Momentum Vector and Its Magnitude'

For the quantum state ##|l,m\rangle= |2,0\rangle## the z-component of angular momentum is zero and ##|L^2|=6 \hbar^2##. According to uncertainty it is impossible to determine the values of ##L_x, L_y, L_z## simultaneously. However, we know that ##L_x## and ## L_y##, like ##L_z##, get the values ##(-2,-1,0,1,2) \hbar##. In other words, for the state ##|2,0\rangle## we have ##\vec{L}=(L_x, L_y,0)## with ##L_x## and ## L_y## one of the values ##(-2,-1,0,1,2) \hbar##. But none of these...
View full post »

Similar threads

I Why is the coupling factor constant in QFT?
  • · Replies 1 ·
Replies
1
Views
1K
A Question about Propagators in QFT
  • · Replies 13 ·
Replies
13
Views
3K
A Importance of Densities in QFT
  • · Replies 1 ·
Replies
1
Views
2K
B Quantum Field Theory As Simple As Possible
  • · Replies 2 ·
Replies
2
Views
1K
A Confusion about creation/annihilation operators with interaction
  • · Replies 1 ·
Replies
1
Views
371
I Confusion about Scattering in Quantum Electrodynamics
  • · Replies 134 ·
5
Replies
134
Views
11K
What are the basic mathematical objects in QFT?
  • · Replies 7 ·
Replies
7
Views
2K
A QFT S-matrix explanations are incomprehensible
  • · Replies 2 ·
Replies
2
Views
1K
I What are anomalies in quantum field theory?
  • · Replies 4 ·
Replies
4
Views
1K
A QFT Superposition of Final States
  • · Replies 3 ·
Replies
3
Views
1K