A Measurement from Feynman diagram

wasi-uz-zaman
Messages
89
Reaction score
1
TL;DR Summary
different calculations from Feynman diagram
hi, can anyone please give me the list of measurement we can do ON Feynman diagram?
Like , branching ratio, cross-section etc
 
Physics news on Phys.org
Those are not measurements you do on Feynman diagrams. Feynman diagrams are not for measuring things, they are graphical representations of terms of a mathematical expression. In order to conclude this from them you need to do the math.
 
Last edited:
Reply
  • Like
Likes Vanadium 50 and vanhees71

Thread 'Toponium Discovered'

Toponium is a hadron which is the bound state of a valance top quark and a valance antitop quark. Oversimplified presentations often state that top quarks don't form hadrons, because they decay to bottom quarks extremely rapidly after they are created, leaving no time to form a hadron. And, the vast majority of the time, this is true. But, the lifetime of a top quark is only an average lifetime. Sometimes it decays faster and sometimes it decays slower. In the highly improbable case that...
View full post »

Thread 'Dirac-Delta from Normalization of Continuous Eigenfunctions'

I'm following this paper by Kitaev on SL(2,R) representations and I'm having a problem in the normalization of the continuous eigenfunctions (eqs. (67)-(70)), which satisfy \langle f_s | f_{s'} \rangle = \int_{0}^{1} \frac{2}{(1-u)^2} f_s(u)^* f_{s'}(u) \, du. \tag{67} The singular contribution of the integral arises at the endpoint u=1 of the integral, and in the limit u \to 1, the function f_s(u) takes on the form f_s(u) \approx a_s (1-u)^{1/2 + i s} + a_s^* (1-u)^{1/2 - i s}. \tag{70}...
View full post »

Similar threads

A How to calculate Feynman amplitude in Fish diagram
Replies
2
Views
2K
A What are some example Feynman diagrams in Yang-Mills theory?
Replies
1
Views
2K
A The Optical Theorem for Feynman Diagrams
Replies
6
Views
3K
A Developing the Feynman diagram expansion
Replies
2
Views
2K
A How does one find the Feynman diagrams?
Replies
1
Views
2K
I Feynman Diagrams: ψφ → ψφ | Tips & Advice
Replies
2
Views
2K
A How to find branching ratio after modelling Lagrangian?
Replies
0
Views
2K
I I don't understand this Feynman Diagram
Replies
3
Views
2K
I Electroweak Feynman Rules: Confusion about the photon-W boson interaction term
Replies
2
Views
2K
I Dominant Feynman diagram for ##b \to s ~l^+ l^−##
Replies
4
Views
2K

Hot Threads

Recent Insights

Back
Top