Where can I find step-by-step calculus for QFT processes online?

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Discussion Overview

The discussion revolves around finding online resources that provide step-by-step calculus for quantum field theory (QFT) processes, particularly focusing on calculating cross sections from Feynman diagrams across various interactions such as quantum electrodynamics (QED), weak, and strong forces.

Discussion Character

  • Exploratory
  • Homework-related

Main Points Raised

  • Marco seeks online resources that detail the mathematical calculations involved in QFT processes, specifically for cross sections derived from Feynman diagrams.
  • One participant questions whether such detailed resources exist, noting that Feynman diagram calculations are typically tedious and often assigned as homework problems.
  • This participant suggests that professionals usually rely on computational tools or pre-existing results rather than performing full calculations manually.
  • A recommendation is made for Griffiths' book "Introduction to Elementary Particles," which is noted for providing more examples and clearer calculations than many other texts.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the availability of detailed online resources, with some expressing skepticism about finding comprehensive step-by-step guides.

Contextual Notes

The discussion highlights the potential limitations of online resources in providing detailed mathematical derivations and the reliance on textbooks for more thorough explanations.

Marco_84
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Im currently studying different kinds of processes in QFT.
Does somebody know where to find all the calculus done step by step on the web.
It will be very helpfull.
thanks in advance,
Marco.
 
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Just to be clear:

You want something on the web that shows all the math to calculate a cross section from a feynman diagram for many different processes (qed, weak, strong, etc)?
 
Norman said:
Just to be clear:

You want something on the web that shows all the math to calculate a cross section from a feynman diagram for many different processes (qed, weak, strong, etc)?

yep I am so lazy...

marco
 
I doubt you will find much spelled out in nitty gritty detail on the web. Feynman diagram calculations are rather tedious to compute (hence the reason they're often given as homework problems). In practise, proffessionals use either a computer, have the result handy already, or they have learned the necessary tricks to get the information they want quickly, without doing the full algebra.

Probably the book that does the best job showing actual calculations in an understandable way is Griffiths 'introduction to elementary particles' as he does quite a few more examples than most books do (at least that I have read).
 
thanks for suggestions.

ciao
marco
 

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