Tagged Questions
1
vote
1answer
141 views
Feynman diagrams in three dimensions
Is there such a thing as an extension of Feynman diagrams into three dimensions?
Canonical Feynman diagrams use one space and one time dimension to visualize processes involving elementary particles ...
2
votes
0answers
50 views
Chirality when moving around legs in Feynman diagrams
Assuming one has the following term in a Lagrangian:
$$
g (\overline{A_R} B_L)(\overline{C_R}D_L)
$$
where A,B,C,D correspond to spin 1/2 Dirac particles and the subscripts $R$ and $L$ denote left- ...
6
votes
3answers
195 views
Is there a simple way to compute some physical constant from Feynman diagram statistics?
I've been playing around writing some software to generate Feynman diagrams for QED, respecting the vertex "rules" described here, and avoiding creating isomorphic duplicates.
So from a starter ...
6
votes
1answer
161 views
SUSY, ways to boost Chargino/Neutralino production?
Does anybody know a good reference that works out the equations for the Chargino/Neutralino production cross section in SUSY? I'm trying to understand if there are any tricks for boosting the ...
2
votes
1answer
201 views
4th order feynman-diagrams for $e^- + \mu^+ \to \nu_e + \bar{\nu}_\mu$
The task is to draw the two 4th-order Feynman diagrams of:
$$e^- + \mu^+ \to \nu_e + \bar{\nu}_\mu $$
I drew the first one as (time left->right):
...
5
votes
2answers
411 views
How do we distinguish between virtual particle exchange and particle decay?
The difference between virtual particles and unstable particles is discussed at length in this question (namely, virtual particles correspond to internal lines in Feynman diagrams and are not ...
0
votes
1answer
111 views
weak bosons and feynman-stueckelberg interpretation
from Wiki "The W bosons have a positive and negative electric charge of 1 elementary charge respectively and are each other's antiparticle."
Q:If each is the other's antiparticle then which is ...
