...like in Photon-Photon-scattering. I know this doesn't make sense physically but the value for the diagram should still be computeable. If I want to put the expression for the matrix element together, I get a matrix, but it should be a scalar, right? Since the spinor bi-product is missing...
Homework Statement
Draw the Feynman diagram for:
e^{-} + p \rightarrow n + \upsilon_{e}
Sorry, I don't know how to make everything even but you should get the gist.
Homework Equations
The Attempt at a Solution
Well, what I have is the electron and proton annihilating(and this...
Homework Statement
Q)
Neutral pion decays into 2 photons which then decay into electron-positron pairs.
What would the feynman diagram look like?
:confused:
Hi! I need some help with latex. I need to draw Feynman diagrams and it seems that the package feynmfm relies on Metafont, which I really don't even have the slightest idea as how to use it.
Anyway, I tried to find a good tutorial on the subject (metafont) but it looks like i will need some...
I'm far from well versed in physics, but I'm trying to understand something about a Feynman diagram I saw. The diagram shows an electron and positron annihilating, and producing a quark/anti-quark pair and a gluon. I recently saw a special on the discovery channel that said matter/anti-matter...
Hi
I have to draw a Feynman diagram for the following reaction:
K^{*+} \rightarrow K^0 + \pi^+
The K^{*+}-meson is composed of an u and an anti-s quark, the K^0-meson is composed of a d and an anti-s quark, and the \pi^+-meson is composed of an u and an anti-d quark. I have drawn...
In doing my \phi^{3} theory I didn't know exactly how to count the number of loops in a diagram given the number of vertices, internal and external lines. Is there a general algorithm in doing this? What if we have more than one interaction vertex (e.g. the Standard Model)?
PS. What does it...
I have been researching Feynman and his diagram and really can't find much on the Diagram itself. Could anyone tell me the mathematics and other concepts behind it in excruciating detail? Or at least a site I can find it?
Thanks
I'm pretty new to the particle physics world, and modern physics in general, so bear with me. I also don't have a book yet, so it's kind of messed up I'm a bit confused by a few apsects of feynman diagrams, although my confusion actually lies much deeper. Looking at this diagram...